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NEC MultiSync LCD2490WUXi2

1. Display Configuration 4 Windows only opens the Display Configuration dialog This is the same as clicking the Display Configure button Target opens the Edit Calibration Target dialog Tools menu Information Window opens the Information window Colorimeter Window opens the Colorimeter window Test Pattern displays a variety of test patterns on the screen that can be used to evaluate the status of the monitor calibration and performance Click the left and right arrow buttons to select different test patterns or use the and keyboard keys Select this menu again to turn off the test pattern or click the X button Ambient Light Measurement opens the Ambient Light Measurement window and is used to measure the ambient light of the viewing environment around the display monitor This feature is only available when using sensors that support this measuring ambient light Monitor Settings opens the Monitor Settings window and is used to access some settings on the display monitor Help menu About displays the About dialog box which shows the software version number shown on the Application menu on Mac OS Check for updates contacts the NEC Display Solutions website and checks to see if a newer version of SpectraView is available If a newer version is available information about the version and download links will be shown An Internet connection is required for this feature to
2. Refresh Rate The number of times the display screen is electronically scanned or painted each second Expressed in Hertz Hz Saturation An expression of the amount a color deviates from being achromatic neutral in color such as gray For example red is a saturated color while pink is less saturated and white has no saturation SECAM Sequentiel Couleur Avec M moire Sequential Color with Memory A standard for encoding video signals used mainly in France and Eastern Europe Soft Proof Previewing on a display monitor what an image will actually look like when print ed on a particular printer Subtractive Primaries Cyan magenta and yellow colors such as dyes or inks that subtract light reflecting off objects giving the appearance of color For example magenta ink subtracts green light When combined together cyan magenta and yellow produce black Tone Response Curve A graph representing the relationship between the input and out put of a system or device In SpectraView Tone Response Curves represent the relationship between the intensity of a color within an application and the light intensity displayed on the monitor USB Universal Serial Bus A communication bus used to connect up to 127 devices such as keyboards mice scanners color sensors etc Viewing Booth See Lightbox White point Specifies the color of pure white on a display usually as a Color Temperature expressed in Kelv
3. 120 150 cd m The LCD2690WUXi2 will adjust the white point as well as the Intensity 36 SPECTRAVIEW USER S GUIDE About Targets SpectraView can also create custom Targets which can then be exchanged with other SpectraView display users providing identical calibrated displays A Target consists of up to four specifications that describe the color characteristics of the display e Gamma or Tone Response Curve TRC e White Point e Intensity e Contrast Ratio Gamma and Tone Response Curves TRC The Gamma or Tone Response Curve of a display is the relationship between the video input signal level and the light output brightness displayed on the monitor The display monitor is a nonlinear display device In simple terms this means that doubling the level of the video input signal to the display does not double the light output For CRT based displays the light output follows a mathematical power function of the input video signal This power function has an exponent called gamma which is commonly used to describe the relationship between the video input signal and light output of the screen A gamma value of 1 would result in a perfectly linear display doubling the signal level doubles the light output and the Tone Response Curves would be straight lines The particular Tone Response Curves of a display will change with the display color settings and may vary from one display to the next If accurate color matching i
4. Kelvin value is only meaningful for colors that are near the black body radiator locus such as most shades of white Sample Color By selecting this group a custom color can be shown in the measurement area To interactively adjust the color click and drag within the color circle or use the arrow keys Use the vertical slider control to adjust the Intensity Specific Red Green and Blue values can also be entered 31 SPECTRAVIEW II USER S GUIDE Ambient Light Measurement window k Ambient Light Measurement ISO 12646 makes the following recommendations about the ambient lighting conditions for displays used in color critical applications When Viewing Monitor and Hard Copy Images 1 Ambient illumination should be less than 32 Lux 2 The color temperature of the ambient light should be within 200K of the viewing booth illumination When Viewing Monitor Images Only 1 The luminance of the area surrounding the monitor should be less than 20 and preferably even less than 3 of the monitor white luminance Intensity 2 Ambient illumination should be less than 25 of the monitor white luminance Intensity Sensor Ambient Light Measurement Luminance 23 Lux Color Temperature 4400 K The Ambient Light Measurement tool allows measurements to be taken of the ambient light of the viewing environment around the display monitor This feature is only available when using a supported color sensor Currently supported c
5. Measurement Area Csin Continuous CIE XYZ X 318 25 7 Z 362 43 CIE xyY x 0 313 y 0 331 Y 336 57 cd m Color Temperature 6484 K 0 001 Auv MI Sample Color Red 255 fl 5 Green 255 f Blue 255 Reset rrr Color Picker et ee ee Close The Colorimeter tool allows measurements of colors displayed on the screen to be taken with the calibration sensor and is accessed from the Tools menu The measurement results are displayed in a variety of useful formats To take color measurements using the Colorimeter place the calibration sensor to the screen so that it is centered on the large white area in the Colorimeter window Measure e Single clicking this button will take a single color measurement and display the results e Continuous selecting this will take repeated measurements automatically and display the results The CIE XYZ and xyY fields show the calibration sensor s measurements translated into each of the respective color spaces These color spaces are device independent color spaces which means that they are not relative to any specific device as opposed to dependent color spaces such as RGB which is relative to the device that is displaying the color The Color Temp field shows the corresponding correlated black body radiator temperature of the measurement in Kelvin The Auv Delta uv value indicates how far the measurement is from the blackbody radiator locus The
6. a display monitor and the screen output luminance Typically the screen luminance follows a mathematical power function of the input video signal the exponent of which is called the gamma Gamut The range of colors that can be reproduced on a particular device such as a monitor or printer or that can be distinguished by a sensing device such as a scanner or the human eye Hue The basic attribute of color such as red green yellow blue or purple ICC International Color Consortium a color industry group working on standards for color management technology ICC Profile A file conforming to the standards set by the ICC that contains a description of the color characteristics of a device such as a monitor printer or scanner In Windows ICC profiles have the file extension icm Image Color Management ICM The Color Management System built into the Microsoft Windows operating systems Intensity Intensity specifies the luminance or brightness of white when displayed on the screen Kelvin An absolute temperature scale denoted by K Zero Kelvin OK is equivalent to 273 Celsius Lab See CIE Lab LED Light Emitting Diode LCD Liquid Crystal Display Lightbox An enclosure with controlled lighting conditions used to evaluate proofs transpar encies and other printed materials Typically a lightbox is illuminated to approximate a standard illuminant such as D50 or 5 Luminance A m
7. a wide color gamut display together with the standard gamut screen on my MacBook Colors in Safari look oversaturated when the window is on the wide gamut display What is wrong Answer The color management in Safari and some other Mac applications will only apply color correction for the primary display the display with the menu bar When a window is moved to the secondary display the correct color correction for that display is not applied This causes the images to be oversaturated on the secondary display To display colors correctly on the wide color gamut display it must be made the primary display Use the Mac OS System Preferences Displays to configure the display as the primary Question lm using two different displays and calibrating both to the same target however the white points do not match exactly What can do to improve this Answer This issue can be caused by the different spectral outputs of the two displays causing the human eye to see color differences differently than the color sensor used to calibrate the displays In this case the numerical measurements from the color sensor are identical on both displays but they do not visually match Manually visually matching one display to another can usually avoid this issue The basic steps to take are as follows 1 Calibrate both displays 2 Pick one of the displays to be a reference Call this display 1 3 Select display 2 in SpectraView and open the Custom White Point
8. allowing images to be transferred between systems with different monitor settings without loosing any color information or restricting the color gamut of the image Photoshop will convert colors on the fly when it displays the image on the SpectraView monitor so the colors you see accurately reflect the file s working color space The selection of an RGB color workspace will depend on the application For details of the standard color workspaces included in Photoshop consult the online help in Photoshop Note that typically the color workspace will be different to that of the display monitor Do not attempt to load the CC ColorSync monitor profile as the color workspace in Photoshop When editing an image in CMYK format Photoshop uses the monitor color characteristics to perform the CMYK to RGB conversion necessary to display the image accurately on the display monitor which uses a RGB device dependent color space When editing or viewing an image in RGB format Photoshop also uses the display monitor color characteristics together with a set of printer separation tables or printer CC ColorSync profile to perform the RGB to CMYK conversion necessary to preview or soft proof a print the image Printer separation tables are usually provided by the printer manufacturer or other third party or can be generated using a 3rd party printer profiling application 41 SPECTRAVIEW II USER S GUIDE Frequently Asked Questions Calibration Questio
9. dialog Use the Visual Match tool to adjust the white color so it visually matches white shown on display 1 4 When a visual match is achieved put the sensor over the measurement area and click Measure This will enter the value that the sensor perceives into the White Point Save this as a new Target 5 Recalibrate display 2 with this new Target From now on always use the respective Target to calibrate each display 42 SPECTRAVIEW II USER S GUIDE Question Each time calibrate my monitor receive a different Delta E result Should recalibrate again if receive a value that is high Answer For Delta E values of less than 2 there is almost certainly no need to recalibrate For values higher than 3 it is important to understand what the cause is and if it is significant The calibration and adjustment process has inherent variability due to many factors such as the repeatability of color sensor measurements and changes within the display as it is adjusted The basic accuracy and repeatability specifications for most sensors is typically 0 002 or higher for CIE xy and 2 for luminance These variances alone can give rise to Delta E values of up to 2 or 3 When a specific Intensity value is being used for the calibration the Delta E value is comprised of the luminance and color differences Differences in color are much more critical than a difference in relative luminance Look at the results of the calibrat
10. een 0 90 _ include Dark Values 320 M Show Average 280 NM N gt Output Luminance 120 80 40 Delta E CIE94 The Color Tracking tab shows graphically how well the grayscale colors from black to white of the display is conforming to the currently selected Target Ideally all points along a grayscale measured on the display should have the same white point chromaticity and should follow the luminance curve of the Target Deviations from this ideal can result in grayscale color tracking errors which can be seen as shifts in chromaticity along the grayscale and or shifts in luminance The Delta E values are a mathematical measure of these deviations A Delta E value of 1 is considered to be just perceptible to 50 of users Values under 3 are generally considered excellent for display calibration Values above 3 will be highlighted in yellow or red and may indicate a problem with the display s calibration The graph shows the displays actual measured grayscale color tracking using measurements taken while generating an ICC ColorSync monitor profile of the display The horizontal axis shows the Delta E values for each measured point on the grayscale The vertical axis shows the luminance for each of the measured points on the grayscale Note that since the Delta E values are calculated based on the currently selected Target If a Target using Intensity Specific Level is being used and the dis
11. match a reference if necessary To interactively adjust the color of the display click and drag within the color circle or use the arrow keys Use the vertical slider control to adjust the Intensity Specific Red Green and Blue values can also be entered Once a visual match is found the adjusted white point must be measured by clicking the Measure button and measuring the white circle with the color sensor This will update the Target white point values with the new White Point values 18 SPECTRAVIEW II USER S GUIDE Note Due to the technology limitations of the color sensor compared to the human eye for some applications it is sometimes better to visually match a white point using this interactive method and then measure it using the color sensor Preferences dialog The Preferences dialog is accessed from the Edit menu 44 Windows and SpectraView II application menu Mac OS It is divided into 5 different tabs The default settings for the entire Preferences can be restored by clicking the Defaults button SpectraView Il Preferences Calibration ICC Profile Interface Display Sensor type XRite iOne Display gt Auto Detect Model NEC MDSVSENSOR Custom iOne Display v2 Serial 951011 Note If the Calibration Sensor was connected after launching this application it may be necessary to restart this application in order to detect the sensor Mi Average low luminance measurements Improves
12. shows the best fit line between all the calculated JND per DDL values as a line on the graph Ideally this line should be horizontal indicating equal steps in JDN per DDL along the display s grayscale 29 SPECTRAVIEW II USER S GUIDE 0 0 Information Display 1 LCD3090WQxi 0 Summary Color Gamut Curves Color Tracking DICOM Conformance 4 Graph JND per DDL Contrast Response JND per DDL Average 2 324 Std Dev 0 125 Contrast Response Max Error 2 25 at JND Index 57 1 Mi Show Barten Model vi Show 10 Limits M Show 20 Limits dL L for a JND 0 70 140 210 280 350 420 490 560 630 700 JND Index Contrast Response Max error shows the highest percentage error deviation from the Barten Model curve as well as the JND Index of the highest error point Show Barten Model shows the Barten Model curve on the graph The Barten Model curve is calculated based on the measured Intensity white luminance and black level values Show 10 Limits shows two lines representing 10 error deviations from the Barten Model curve Medical displays used for Primary Class image viewing should be within the 10 deviation curves Show 20 Limits shows two lines representing 20 error deviations from the Barten Model curve Medical displays used for Secondary Class image viewing should be within the 20 deviation curves 30 SPECTRAVIEW USER S GUIDE Colorimeter window Ml spectraView Colorimeter Measure
13. 990SX 19 LCD monitor LCD1990SXi 19 LCD monitor LCD1990SXp 19 LCD monitor e LCD2090UXi 20 LCD monitor e LCD2180UX 21 LCD monitor e LCD2180WG LED 21 LED wide color gamut LCD monitor e LCD2190UXi 21 LCD monitor e LCD2190UXp 21 LCD monitor e LCD2490WUXi 24 LCD monitor e LCD2490WUXi2 24 LCD monitor e LCD2690WUXi 26 wide color gamut LCD monitor e LCD2690WUXi2 26 wide color gamut LCD monitor e LCD3090WQxXi 30 wide color gamut LCD monitor e LCD4020 40 LCD monitor e LCD4620 46 LCD monitor e LCD5220 52 LCD monitor LCD6520 65 LCD monitor e M40 M40B and M40 2 40 LCD monitors e M46 M46B and M46 2 46 LCD monitors X461UN 46 LCD monitor X461HB 46 LCD monitor P401 40 LCD monitor P461 46 LCD monitor P521 52 LCD monitor P701 70 LCD monitor e P221W 22 wide color gamut LCD monitor e PA241W 24 wide color gamut LCD monitor e PA271W 27 wide color gamut LCD monitor Microsoft Windows Microsoft Windows 2000 XP XP x64 Server 2003 Vista and Vista x64 Windows 7 and Windows 7 x64 Most recent ATI Nvidia Matrox S3 Graphics and Intel graphics adapters Digital DVI output is highly recommended See README file for details SPECTRAVIEW USER S GUIDE 8 System Requirements SpectraView has the following system requirements Apple Mac OS X v10 3 9 or high
14. IDE 1 MultiSync PA Series Information The SpectraView software supports the MultiSync PA241W and PA271W monitors These models feature a custom designed color processor called the SpectraView Engine This sophisticated processor combined with internal luminance temperature and time monitoring of the monitor and individual characterization and calibration of each unit during production results in an unparalleled level of color control accuracy and stability When SpectraView II is used to calibrate these models e The 5th of the 5 selectable Picture Modes is always automatically selected and used to store the calibration made by SpectraView II e The Custom 3 memory location is always used to store the calibration This location will be automatically named Spectra Viewll e The SpectraView software can be used together with the MultiProfiler software When MultiProfiler is with SpectraView II the CC ColorSync profile generated by SpectraView will always be activated by MultiProfiler when the Picture Mode calibrated by SpectraView II is selected For all other Picture Modes the ICC ColorSync profiles generated by MulitProfiler will be used e The number of Calibration and Profile steps set in the Preferences does not increase or decrease the accuracy of the grayscale calibration when calibrating the display This is because the monitor s internal calibration is used The MultiProfiler available for free from Wwww necdispla
15. OM TG18 GC test pattern has a number of useful features that allow very detailed analysis of the monitor grayscale performance in one pattern The main features of this pattern are described below Line pair patterns for resolution evaluation having pixel values of 0 255 and 128 130 ERA ERA MIHE 3AWER JIHEM WE RA 256 level grayscale with 2 lines per level eS SS SSS SS a SS a SE ESS FE t aA da Els Grey background of pixel value 128 ERIH Ma OF JYER E Sixteen luminance patches with pixel values QUALITY CONTROL characters varying from 8 to 248 for luminance response with decreasing contrasts at minimum evaluation Each patch contains four small mid point and maximum pixel values 10x10 pixel corner patches at 4 of pixel value for simple low contrast evaluation at difference from the background 4 in upper left three luminance levels Two patches of minimum and maximum pixel value with 13 and 242 pixel value internal patches similar to 5 and 95 areas in the SMPTE test pattern and lower right 4 in lower left and upper right The small patches are used for visual assessment of luminance response Several other patterns are available in SpectraView and can be selected using the buttons at the top left of the screen or using the and keys Pattern 18 White Quality Control 47 SPECTRAVIEW II USER S GU
16. Version SpectraView User s Guide 2 SPECTRAVIEW Il USER S GUIDE Software Updates and Feedback Trademarks and Copyright SpectraView is a registered trademark of NEC Display Solutions of America Inc Adobe the Adobe logo Acrobat and Photoshop are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and or other countries Apple Macintosh ColorSync Mac and the Mac logo are trademarks of Apple Computer Inc registered in the U S and other countries Microsoft Excel and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and or other countries Copyright 2003 10 NEC Display Solutions Ltd The content of this manual is furnished for informational use only is subject to change without notice and should not be construed as a commitment by NEC Display Solutions Ltd NEC Display Solutions Ltd assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual All rights reserved Your rights of ownership are subject to the limitations and restrictions imposed by the copyright laws as outlined below is against the law to copy reproduce or transmit including without limitation electronic transmission over any network any part of the manual except as permitted by the Copyright Act of the United States Title 17 United States Code Under the law copying includes translati
17. acking DICOM Conformance White Point Primary Colors 5 Black Body CIE x y amp CIE x y Target 6506 K 0 313 0 329 Red 0 676 0 311 Calibrated 6584 K 0 311 0 329 Green 0 215 0 688 Delta E 0 63 Blue 0 150 0 058 Display Luminance Contrast Ratio Black Level Intensity 0 Target Monitor Default i Target N A Maximum Calibrated 662 1 2 2 Calibrated 0 50 cd m 333 9 cd m Auto Luminance Off Model LCD3090WQXi Serial 83100160YA Gamma Curve Target 2 20 Firmware 1 00 01 Calibration Steps 32 Current Usage 689 5 hours usage Last Calibration 0 0 hours usage ago oe Calibration Date 12 8 08 1 32 PM File Name LCD3090WQxi S 83100160YA icc Calibration Sensor Description LCD3090WQXi 83100160YA 6 Model NEC MDSVSENSOR Custom iOne Display v2 2008 12 08 13 32 D65 2 20 Serial 951011 Note The graphs shown in the Information window can be panned zoomed and scaled Click and drag to select a zoom area Use the arrow keys to pan Size the dialog to scale the graphs The graphs and information can also be copied to the clipboard and pasted into other document and image editing applications by right clicking and selecting Copy This ts useful for sharing and documenting various results Information window Summary tab White Point The Target values are the currently selected Target s White Point The Calibrated values show the actual measured White Point after the display has b
18. aim of the DICOM response is to have a perceptually linear luminance response Each step along the display s grayscale should have an equally perceptive increase in luminance The actual shape of the DICOM response curve is based on the display s measured Black Level and Intensity since the DICOM response considers the human eye s non linear response to light In DICOM terminology the grayscale level is called the Digital Driving Level and represents the digital output video level from 0 to 255 Each step in Digital Driving Level should result in an equal step in perceived luminance In DICOM terminology a change in luminance that is just perceptible is considered to be 1 JND Just Noticeable Difference So ideally each step in Digital Driving Level should result in an equal change in Just Noticeable Difference value The JND values are calculated using a complex formula from two measured luminance values The display calibration results can be viewed in two different types of graphs JND per DDL and Contrast Response by selecting the corresponding graph type JND per DDL Just Noticeable Difference per Digital Driving Level Average shows the average JND per DDL value The actual value will depend on the Black Level and Intensity of the display Std Dev shows the standard deviation of all of the calculated JND per DDL values Show Average shows the average JND per DDL value as a horizontal line on the graph Show Linear Fit
19. ally illustrates the various tone response and correction curves measured and generated during the calibration process Show Curve Type Target illustrates the target tonal response curve of the currently selected Target This display will be calibrated to match this curve This curve will be disabled and not shown if the Target Gamma is set to Monitor Native Gamma Calibrated illustrates the actual measured tonal response curves of the calibrated display These curves are generated from measurements taken while generating an I CC ColorSync monitor profile of the display no ICC ColorSync profile was generated after the monitor was calibrated then this checkbox will be disabled Uncalibrated illustrates the actual measured tonal response curves of the uncalibrated display without any corrections applied to the Look Up Tables These curves are generated from measurements taken during the calibration process Correction illustrates the correction that is applied to the display s Look Up Tables in order to achieve the selected Target tonal response curve characteristics Show Curve Color The All Red Green and Blue buttons select which curve colors are displayed on the graph 27 SPECTRAVIEW II USER S GUIDE Information window Color Tracking tab 8 0 08 Information Display 1 LCD3090WQXi__ Summary ColorGamut d Curves Color Tracking DICOM Conformance Grayscale Delta E 400 Average 0 59 360
20. ally only useful when a very low Intensity value is used Defaults Cancel OK Calibration and Profile Steps selects the number of measurement steps to take when calibrating and profiling the display A larger number of steps will generally result in a more accurate grayscale calibration but will increase the calibration time 32 steps is the recommended setting for most applications Recalibration Reminder Period sets the interval after the display is calibrated until a calibration reminder message is displayed The default value is 2 weeks Select Never if you do not want to be reminded to recalibrate the display Calibration Priority selects the algorithm used to calculate the display s response curve Options are e Maximize Contrast Ratio will maximize the display s contrast ratio by making black as dark as possible at the expense of grayscale color tracking near black e Best grayscale color tracking will generate the best grayscale color tracking in the black areas at the expense of a slightly reduced contrast ratio This option will not be used if a calibration Target with a Contrast Ratio of other than Default is used Extended luminance stabilization time increases the waiting time for the display to stabilize while the luminance is being adjusted This option can be used if necessary to increase the accuracy of the luminance adjustment when a Target with a Specific Level of Intensity is being used It may sign
21. and black color layers used for printing Color Separation Tables A set of conversion tables used to calculate the separating of RGB images into the CMYK layers necessary for printing Color Space A three dimensional representation of colors Examples are RGB CIE xyY and CIE Lab ColorSync The Color Management System built into the Macintosh Operating System Mac OS Color Temperature The color of light given off by an object Known as a blackbody as it is heated to a given temperature in degrees Kelvin Low color temperatures such as 5000K are reddish whilst higher color temperatures such as 9300K are bluish A color temperature of 6500K is considered to be neutral white Contrast Ratio The ratio of the white luminance Intensity and black luminance Black Level of the display Correlated Color Temperature The closest matching color expressed in Kelvin of a white point that does not lie exactly on the blackbody locus CMYK The subtractive colors used in printing Cyan Magenta Yellow and Black Note that Black is referred to using K to avoid confusion with blue D Illuminants CIE Daylight Standard IIluminants based on approximating daylight The subscript denotes the correlated color temperature of the illuminant For example D50 has a correlated color temperature of 5000K Delta E A E A measurement of how different two colors are to each other In SpectraView Delta E val
22. ation tables as well as the type of inks and paper used all affect how accurate the final prints will be The lighting conditions used when viewing the final print is also absolutely critical and the use of a calibrated lightbox is highly recommended Be aware that it is almost impossible to get an absolute perfect match under all conditions on any color management system or display Before calibrating the SpectraView display the desired color characteristics of the calibrated monitor must be selected In SpectraView these characteristics are called Targets SpectraView then adjusts the monitor to the color characteristics in the selected Target Once the calibration is complete SpectraView can then re measure the display and create an ICC ColorSync profile of the monitor which contains information used by the Color Management System to retain the various color characteristics of the calibrated monitor The calibration target used will depend on the application 35 SPECTRAVIEW USER S GUIDE SpectraView includes several industry standard targets for a variety of applications Target Name Application White Point Tone Response Curve CIE x y Gamma Print Standard Commonly referred toas Proofing D50 0 346 0 359 1 8 Standard Used widely for the proofing of color transparencies or press output Photo Editing Used for editing and previewing D65 0 313 0 329 images in a controlled lighting environment An Intensity of 140 candelas
23. cd m is used Broadcast Video Used for editing images and D65 0 313 0 329 video intended to be displayed on televisions using the NTSC PAL or SECAM standards sRGB Emulation This is a special target that is D65 Factory Preset 2 2 Factory Preset only available when using a supported wide color gamut display This target will switch the display into the sRGB Emulation mode which reduces the color gamut to approximate that of SRGB DICOM Blue Medical Imaging using blue 0 265 0 320 DICOM Curve base film 0 DICOM White Medical Imaging 0 292 0 321 DICOM Curve Digital Cinema Images and video intended for 0 314 0 351 2 6 cinematic projection Note LCD2690WUXi2 will calibrate the white point to D65 instead of using the factory preset Note When using the SRGB Emulation target The Factory Preset white point is used on the following models LCD2690WUXi LCD3090WQxXi and P221W It is not possible to adjust the white point of the sRGB Emulation mode on these models The calibration will only adjust the Intensity and generate an ICC ColorSync profile of the display on these models The resulting Delta E values may be higher than normal because the white point is not adjusted using the calibration sensor e The range of Intensity values that the display can be calibrated to using the sRGB Emulation target is limited on the LCD2690WUXi It may not be possible to achieve low Intensity values below roughly
24. click Advanced 2 Select the Color Management tab on the Display Properties dialog 3 Find the color profile generated by SpectraView and use Set As Default e Amore advanced control panel is available from Microsoft for Windows XP which is much more reliable for checking the assigned monitor profile On the www microsoft com website search for Color Control Panel Applet 45 SPECTRAVIEW II USER S GUIDE NaViSet Administrator nar Using SpectraView with NaViSet Administrator 24 Windows version only The SpectraView software integrates with the NEC DISPLAY SOLUTIONS NaViSet Administrator software to provide remote administration of the display monitors on networked machines NaViSet Administrator will report all of the current SpectraView settings and the current calibration status within the NaViSet Administrator Console application When using the Single Connection feature of NaViSet Administrator to administer a remote machine the SpectraView information will be shown in the monitor metadata report When using the Monitor Asset Report feature to poll and gather information about the display monitors on multiple remote machines the SpectraView information can be included in the Output Monitor Asset Report file by selecting the items to include in the report in the Configuration Wizard Na iSet Administrator Console 1 Ioj x Single Connection Batch Commands Monitor Asset Report Options About M
25. d to create accurate image prints and scans The exact method of loading ICC monitor profiles into the Color Management System will depend on the software application being used Most software applications rely on the operating system Mac OS or Microsoft Windows to provide the current profile information However some applications may have a color management setup where the display monitor profile can be selected SpectraView will automatically select and associate the generated ICC ColorSync monitor profiles with the system s Color Management System Refer to the instructions for the particular software package being used to determine how to correctly load and use the ICC ColorSync monitor profiles generated by SpectraView Adobe Photoshop Overview When combined with accurate printer profiles Photoshop can perform accurate CMYK previews or soft proofs of what an image will look like when printed The hardware based calibration of the SpectraView display monitor will provide superior results compared to the basic visual calibration offered by the Photoshop or ColorSync Control Panels Note that it is not necessary to perform any of the monitor settings in the Adobe Gamma Control Panel since all of the necessary monitor calibration and measurements will be done by SpectraView In Photoshop images are manipulated in what is known as an image color workspace This color workspace is independent of the display monitor color characteristics
26. dapter card for the currently selected display Verify that the correct screen flashes when this button is clicked E Display Configuration This dialog is used to select the relationship between the display desktop and the connected monitor s In some cases it may be necessary to manually specify which display relates to which monitor Click the display below or select from the list Display 2 P221W S N 89000002N7 Display 1 LCD S N 681MT005YB Select the monitor connected to each display device to configure the relationship between display output and monitor s Ree is LCD2690WUXi Attempts to automatically select the monitor for each display Tests the video card LUT support by Test LUT flashing the screen brightness Verify that the correct screen flashes when clicked Tests the monitor communications by flashing the monitor screen brightnes Verify that the correct screen flashes when dicked If the wrong monitor flashes change the mapping relationship above Test Monitor Note Since SpectraView applies all correction curves to the 10 or 12 bit LUT inside the monitor the video graphics adapter card LUT is always set to linear Test Monitor Tests the communications with the currently selected display monitor Clicking this button will send a command to flash the monitor s screen brightness If the wrong display monitor flashes then change the monitor associated with each display can be
27. der to improve the screen luminance and color uniformity This compensation is done at the expense of some screen brightness A higher level of correction will give a more uniform screen but the maximum Intensity brightness that can be achieved will be lower It is recommended to recalibrate if the ColorComp setting is changed 33 SPEC TRAVIEW USER S GUIDE Menus File menu Open Target opens a Target file This is the same as clicking the Target Settings Open button Save Target As saves the current Target Settings to a file This is the same as clicking the Target Settings Save button Calibrate starts the display monitor calibration routine for the currently selected display using the currently selected Target Settings This is the same as clicking the Calibrate button Generate ICC Profile starts the process of creating an ICC ColorSync monitor profile for the currently selected display in its current state without calibrating Validate Calibration measures the current state of the display monitor and compares to the currently selected Target in order to quickly determine if the current calibration is still accurate or if the display should be recalibrated Open previous calibration Opens a previous Monitor Calibration Settings file This is the same as clicking the Calibration Open button Edit menu Preferences opens the Preferences dialog shown on the Application menu on Mac OS
28. dit menu or by clicking on the Display Configure button in the main SpectraView window lf more than one display is being used on Windows it may be necessary to manually configure the relationship between the display layout on the Windows desktop and the display monitors that are connected to the system Correct configuration of this relationship is necessary so that the display monitor adjustments are sent to the correct monitor and that the calibration is performed on the correct part of the desktop A diagram depicting the display desktop layout is shown and the display monitors associated with each desktop screen is shown The monitor associated with each display can be selected using the listboxes Clicking on the display rectangles will also select different displays on the Windows desktop Note Some video graphics adapters may show several duplicate displays due to issues with the video drivers for that adapter In this case the duplicate displays can be selected to None Auto Configure Attempts to automatically detect and configure the display monitors to the display layout on the Windows desktop In most cases this will correctly configure the correct relationship but in some cases it may be necessary to manually configure Test LUT Tests that the video graphics adapter card LUT Look Up Table can be correctly set Clicking this button with flash the screen brightness by setting the LUT in the video graphics a
29. e e Never touch the measurement window in the color sensor e Never disconnect the color sensor while the SpectraView software is running e Always allow the display to warm up for at least 30 minutes before calibrating e Do not adjust the monitor color brightness or contrast controls once it has been calibrated otherwise the color calibration of the monitor may become invalid e Mac OS only Do not use the ColorSync control panel to switch between different display monitor calibrations by selecting different monitor color profiles Always use the SpectraView application to load a previous monitor calibration This is because all of the necessary color adjustments including the Look Up Tables are stored in the display monitor and these must be set by SpectraView The ColorSync profiles generated by SpectraView contain linear Look Up Tables for the video graphics adapter Note This document covers both the Mac OS and Windows versions of the SpectraView Il software The features and functions of both versions are identical unless noted otherwise The majority of the User Interface screen images in this document show the Mac OS version however the Windows version is identical in layout unless noted otherwise 7 SPECTRAVIEW II USER S GUIDE Supported Display Monitors SpectraView supports the following NEC display monitor models LCD1980SXi 19 LCD monitor LCD1980FXi 19 LCD monitor e LCD1
30. easure of the brightness or intensity of light usually expressed in units of Candelas per meter squared cd m or foot Lamberts Look Up Table LUT A table used to translate input values to output values SpectraView displays use 10 or 12 bit internal LUTs to apply Gamma corrections and Tone Response Curves MCS Monitor Calibration Settings file A file used by SpectraView II to store the results of the calibration including the monitor settings and measurements Metamerism A phenomenon in which two color samples appear to match in color under cer tain lighting conditions but not in others MPCD Minimum Perceptible Color Difference A unit of measure developed by the CIE to define the change in light and color required to be just noticeable to the human eye Nit A unit of luminance equal to Candelas per meter squared cd mz NTSC National Television Standards Committee A standard for encoding video signals used widely in North America and Japan 51 SPECTRAVIEW USER S GUIDE PAL Phase Alternation by Line A standard for encoding video signals used in Western Eu rope and parts of Asia Phosphors Materials that emit light when struck by radiation of certain wavelengths CRT displays use phosphors that give off red green and blue light to display an image on the screen Profile A file containing a description of the color characteristics of a device such as a moni tor printer or scanner
31. ed on the lower future black level and Intensity The value used will depend on the display its usage and the time interval until it is expected to next be re calibrated Custom Curve Advanced and custom response curves can be selected from presets or created by importing a table of values Click the Edit button to open the Custom Gamma Curve dialog 15 Intensity The Intensity selects the luminance or brightness of white for the calibration Options are Maximum possible calibrates the display to the maximum possible luminance that it can achieve The actual value achieved will depend on the display s type its age and the white point used This is not recommended when trying to exactly match two or more displays since there may be a difference between what Intensity each display can achieve Specific Level calibrates the display s Intensity to a specified target value If the display can not achieve the specified value it will be calibrated to the closest possible Intensity and a message will be displayed after the calibration has completed Note If you are unsure about what level to use for the Specific Level for a particular application it is possible to interactively adjust both the White Point and Intensity using the Visual Match feature in the Custom White Point dialog Contrast Ratio Contrast Ratio allows a particular contrast ratio to be used if necessary The contrast ratio is the ratio of white to black
32. een calibrated The Delta E value is the calculated color difference between the Target and Calibrated White Point using both the color and luminance This is calculated using the Delta E CIE 94 color formula A Delta E value of 1 is considered just perceptible to 50 of users Values under 3 are generally considered excellent for display calibration 24 SPECTRAVIEW USER S GUIDE Primary Colors Red Green and Blue CIE x y shows the measured color coordinates of the display s primary colors These values represent the color gamut of the display The source of the color measurements will depend on the Primary Colors Chromaticity Source setting in the Preferences dialog Display Luminance The Target values show the currently selected Target s Black Level and Intensity The Calibrated values show the actual measured Black Level and Intensity after the display has been calibrated Contrast Ratio The Contrast Ratio is the ratio of the Intensity to the Black Level The Target value shows the currently selected Target s Contrast Ratio For LCD display monitors this is set to N A since the monitor s Black Level is fixed The Calibrated values show the actual contrast ratio calculated using the actual measured Black Level and Intensity after the display has been calibrated Gamma Curve Target shows the type or gamma value of the Target Gamma Curve Calibration Steps shows the number of calibration steps used to meas
33. er Mac OS 10 5 2 or higher required for some Mac models See README file for details All Apple standard video graphics cards including most newer PowerBooks Digital DVI output is highly recommended See the README file and NEC website for the latest information on Macs with DisplayPort video output Operating System Video Graphics Adapter Video Color Depth At least 24 bit color Millions of colors At least 24 bit color native resolution highly recommended 1280x1024 1600x1200 1680x1050 1920x1080 1920x1200 2560x1440 or 2560x1600 depending on monitor Displays e GretagMacbeth Eye One Display V1 e X Rite GretagMacbeth Eye One Display V2 e X Rite GretagMacbeth Eye One Monitor Eye One Pro e X Rite ColorMunki e Monaco OptixXR X Rite DTP 94 e ColorVision Datacolor Spyder 2 e Datacolor Spyder 3 Displays native resolution highly recommended 1280x1024 1600x1200 1680x1050 1920x1080 1920x1200 2560x1440 or 2560x1600 depending on monitor e GretagMacbeth Eye One Display V1 e X Rite GretagMacbeth Eye One Display V2 e X Rite GretagMacbeth Eye One Monitor Eye One Pro e X Rite ColorMunki e Monaco OptixXR X Rite DTP 94 e ColorVision Datacolor Spyder 2 e Datacolor Spyder 3 Video Resolution Supported Color Sensors At least one available USB port for At least one available USB port for Color Color Sensor Sensor 9 SPECTRAVIEW USER S GUIDE Introduction
34. ess is started The display monitor can be calibrated to the current Target Settings by clicking the Calibrate button Note that this Calibrate button will be disabled if either no supported color sensor or display monitor was detected See the Troubleshooting section for more information Status shows the current calibration status of the display monitor either Calibrated Uncalibrated or Calibration Off Last shows the date and time that the display monitor was last calibrated Next Due shows the number of days until the display is next due for recalibration or the number of days past when it was last due for recalibration This is based on the date of last calibration and the Recalibration Reminder Period in the Preferences dialog the display is not currently in a calibrated state the Calibration On checkbox will be unchecked If the monitor OSD controls are locked using the Lock OSD Controls option in the Preferences dialog the OSD controls will be automatically unlocked when the Calibration On checkbox is cleared Selecting the checkbox will automatically re configure the display monitor to its previously calibrated state The Open button will open the Previous Monitor Calibration dialog which shows all of the previous calibrations that have been performed It is possible to view the detailed results of each calibration as well as manually selecting a previous calibration to load Loading a previous Monitor Calibration
35. et dialog A custom White Point can be created by either specifying it as a Black Body radiator temperature in Kelvin as CIE xy chromaticity Coordinates or by interactive visual adjustment and measurement Values between 2500K and 10000K may be entered in the Black Body K field The corresponding CIE xy coordinates are automatically calculated and displayed for reference CIE xy chromaticity coordinates can be entered by selecting the CIE Coordinates radio button and entering the x and y values The corresponding correlated black body radiator temperature and Auv Delta uv values are automatically calculated and displayed for reference The Delta uv value indicates how far the xy coordinates entered are from the black body radiator locus A custom White Point may be measured using the calibration sensor and automatically entered in the CIE xy chromaticity coordinate fields by clicking the Measure button This is useful for cloning the white point of another monitor The color sensor can be placed over the white circle on the right of the dialog in order to take a measurement of the white point by clicking the Measure button The circle can also be used to visually compare the white point to another reference such as a lightbox If a larger area of white reference is needed selecting White Screen Background will fill the entire screen background with white The luminance and color of the display can be interactively adjusted to visually
36. evel is near to or above the maximum possible Intensity of the display Defaults Cancel OK Lock OSD On Screen Display controls when calibrated selects if the monitor s On Screen Display control buttons are locked when the monitor is calibrated Locking the controls can be useful to prevent accidental or unauthorized adjustment of the monitor once it is calibrated Options are Don t lock e Lock all except Bright and Contrast e Lock all Note The controls will be unlocked if the calibration is turned off in the main window Use Auto Luminance if supported enables the Auto Luminance sensor circuit inside the display monitor to increase the Intensity brightness stability as the display ages and warms up This feature will not be used for Targets with Maximum Possible Intensity selected or if the Target Intensity falls outside the range that the Auto Luminance circuit is capable of controlling This feature is only available on the following models LCD2490WUXi LCD2490WUXi2 LCD2690WUXi LCD2690WUXi2 and LCD3090WQXi The MultiSync PA Series of displays automatically always use Auto Luminance to maintain the stability of the monitor 23 SPECTRAVIEW USER S GUIDE Information window The Information window is accessed from the Tools menu It will also be automatically displayed after a display calibration is completed 8 0 0 Information Display 1 LCD3090WQXi gt lt Color Gamut 4 Curves Color Tr
37. he Product may vary Therefore suitability of a Product for a specific purpose or application must be determined by consumer and is not warranted by NEC DISPLAY SOLUTIONS Federal Communications Commission FCC Notice U S Only WARNING This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions e This device may not cause harmful interference e This de
38. hite Point os Intensity 4 Using SpectraView Launching Selecting a calibration Target Modifying Targets Calibrating and Profiling the Display Profiling the Display Validating the current Calibration 5 Outside of SpectraView Using ICC ColorSync Monitor Profiles Adobe Photoshop Overview Contents 41 1 43 43 45 45 46 47 48 Frequently Asked Questions Calibration Troubleshooting Installation and Setup Using SpectraView with NaViSet Administrator NaViSet Administrator Test Pattern Guide MultiSync PA Series Information 9 10 Glossary 6 SPECTRAVIEW USER S GUIDE Precautions e The LCD display monitor screen is fragile and can be easily damaged if force is applied Never use suction cups to attach a color sensor to the display Always use the supplied cable or sling and counterweight to gently rest the color sensor on the face of the display e During the display calibration procedure highly sensitive light measurements are made on the screen using the color sensor High ambient light levels such as direct sunlight on the screen may affect measurements and cause an inaccurate display calibration Changes in ambient lighting can alter how images on the screen are perceived Locate the display away from bright direct lighting whenever possible and keep a constant ambient lighting level e Always store the color sensor in the holder when not in us
39. ht level Modifying Targets The parameters of Targets can be modified using the Edit Target button which will display the Edit Target dialog Note that modifying a Target will require the display monitor to be recalibrated to the new Target parameters 39 SPECTRAVIEW USER S GUIDE Calibrating and Profiling the Display more than one supported display monitor is connected select the display to be calibrated from the Display listbox Note that each display has an independent Target Click the Calibrate button to start the calibration process The software will provide instructions for placing the calibration sensor on the screen and provide updates as the calibration progresses Once the calibration process has been completed an CC ColorSync profile will be generated if the Generate profile after calibration option in the Preferences dialog is selected The profile will automatically be associated with the system s Color Management System The results of the calibration process will then be displayed in the Information window is also good practice to use the Test Patterns to quickly visually verify the integrity of the calibration Profiling the Display An ICC ColorSync monitor profile of the display can be generated without calibrating the display by selecting Generate ICC Profile from the File menu Non SpectraView displays can be profiled but not calibrated by SpectraView Validating the current Calib
40. ificantly increase the calibration time and is normally only useful when a very low intensity value is used Try selecting this option if the calibrated Intensity is significantly different than the Target value due to the display stabilizing during the calibration and profiling steps 20 SPECTRAVIEW USER S GUIDE Preferences dialog ICC Profile tab SpectraView Preferences Calibration Sensor Calibration 166 Profile Interface Display Ml Generate ICC Profile after calibration If the applications you use do not take advantage of an ICC display profile you can deselect this option to skip the generation of the profile when the display is calibrated ICC Profile file name Set automatically Prompt for file name and description Storage Location Per user of this computer 65 Shared by all users of this computer Source of primary color chromaticities for ICC Profile Automatic Automatically selects the optimal setting based on the color sensor model and the display monitor type Calibration sensor measurements Uses the measurements taken by the color sensor to encode the color gamut information in the ICC profile generated This setting is suitable for all sensors on standard gamut displays Some sensors are inaccurate when measuring wide color gamut displays and this may cause color shifts when viewing images in color managed applications Factory measurements Use the measu
41. illustrates the color gamut of the display for comparison purposes as a 2D representation of the 3D color gamut volume The display s color gamut can be compared to the color gamut of several popular color spaces The source of the color measurements for the display s color gamut will depend on the Primary Colors Chromaticity Source setting in the Preferences dialog Selecting a reference color space will overlay the color gamut onto the display s Colorspace e CIE xy shows the gamut projected in CIE xy colorspace This is probably more familiar to most users however it does not allow color differences to be easily judged because this projection overemphasizes differences in green colors and underemphasizes differences in blue colors e CIE u v shows the gamut projected in CIE u v colorspace This is projection is an improvement over CIE xy in that different colors are more equally represented in scale Show back body curve shows the black body locus as yellow curve Show Target white point shows the White Point of the currently selected target as a green X 26 SPECTRAVIEW II USER S GUIDE Information window Curves tab O 0 Information Display 1 LCD3090WQXi Summary Color Gamut H A Curves Color Tracking DICOM Conformance Show Curve Type Target vi Calibrated Uncalibrated Correction Show Curve Color Output Luminance Input Level The Curves tab graphic
42. in or as CIE xy chromaticity coordinates NEC Copyright 2003 10 NEC Display Solutions Ltd All rights reserved USA and Canada www necdisplay com Australia www spectraview nec com au
43. ion and generation of the ICC profile A larger number will generally result in a more accurate calibration but will increase the calibration time At least 16 steps are recommended and 32 is sufficient for most applications Recalibration Reminder Period Weeks B Sets the duration after calibration until a reminder to re calibrate the monitor will be displayed when the application is launched Calibration Priority Maximize Contrast Ratio Minimizes the calibrated Black Level of the monitor and hence maximizes the Contrast Ratio at the expense of color tracking near absolute black The color temperature of absolute black of most displays is close to D65 Best grayscale color tracking Improves the color tracking grayscale of the monitor near absolute black at the expense of a slightly increased Black Level and hence reduced Contrast Ratio This option may provide better results if the display is used in very dark environments and if the target white point not close to D65 This option will not be used if a calibration Target with a Contrast Ratio of other than Default is selected Extended luminance stabilization time Increases the waiting time for the display to stabilize while the luminance is being adjusted This option can be used if necessary to increase the accuracy of the luminance adjustment when a Target with a Specific Level of Intensity is used It may significantly increase the calibration time and is norm
44. ion shown in the Information window to determine if the high Delta E value is caused mainly by a shift in color or in luminance High Delta E values can also occur if a specific Intensity value is being used for the calibration and the display is not capable of achieving the specified Intensity value The calibration will always aim to achieve the specified White Point even if the Intensity value could not be reached If the display can not be calibrated to achieve the specified Intensity value modify the value accordingly In some situations the display Intensity will drift slightly for several minutes after it is adjusted Since the measured value used to calculate the final Delta E result is taken up to one or two minutes after the display was adjusted a higher Delta E value may be shown even though the calibration process achieved the specified Target values during the calibration process Selecting the Extended luminance stabilization time option in the Preferences can be used to try and minimize this effect Question The Delta E result values shown in SpectraView are higher than those shown in other display calibration applications Does that mean they are better at calibrating the display than SpectraView Answer No SpectraView calculates the Delta E values using both the luminance and color differences for more realistic and accurate values Other applications may calculate Delta E differently Question After calibration manually adj
45. isplayed and the last calibration settings can be reset This checking operation will take several seconds each time SpectraView is launched 22 SPECTRAVIEW USER S GUIDE Delay loading of SpectraView Il Gamma loader on Windows Startup 4 Windows version only selecting this will delay the loading of the SpectraView Gamma Loader when Windows starts by 60 seconds in order to allow other applications and utilities to initialize first Select this option if you are experiencing monitor detection or video blanking issues only when the SpectraView Gamma Loader runs as Windows starts Preferences dialog Display tab M SpectraView Il Preferences Calibration Sensor Calibration ICC Profile Interface Lock OSD On Screen Display controls when calibrated Do not lock 63 Lock all except Brightness and Contrast Lock all Selects if the display monitor s On Screen Display control buttons are locked when calibrated Locking the controls can be useful to prevent accidental or unauthorized adjustment of the monitor once it is calibrated Mi Use Auto Luminance if supported Enables the Auto Luminance feature on the display to increase the Intensity brightness stability by constantly compensating for luminance drift This feature is only available on the LCD2490WUXi LCD2690WUXi LCD2690WUXi2 and LCD3090WQXi models This will not be used for Targets with Maximum Possible Intensity selected or if the Target Intensity l
46. l users of this computer the profile is stored in the shared profile folder that is accessible by all user accounts Source of primary color chromaticities for ICC Profile selects what values are used for the Primary Color Chromaticities that are stored in the CC ColorSync monitor profile The values are used to describe the color gamut of the display 21 SPECTRAVIEW USER S GUIDE Options are e Automatic the optimal setting based on the color sensor model and the display monitor type is automatically used e Calibration Sensor uses the values measured by the calibration sensor For normal color gamut displays this is the recommended option since the calibration sensor can accurately measure these primary colors For wide color gamut displays some colorimeter based calibration sensors may not be able to accurately measure the primary colors and it is recommended to use the Factory Measurement option For spectral based calibration sensors either option can be used e Factory Measurements uses the measurements taken during production of the display monitor to encode the color gamut information in the generated ICC Profile These measurements may be more accurate than those of some color sensors when measuring wide gamut displays such as the P221W LCD2180WG LED LCD2690WUXi LCD2690WUXi2 and LCD3090WQXi Preferences dialog Interface tab SpectraView Preferences Calibration Sensor Calibration ICC P
47. luminance Selecting Monitor Default will calibrate the display to the highest possible contrast ratio which is limited by the display technology the selected White Point Intensity value and other factors In some applications such as simulating low contrast images such as in newsprint it is useful to have a lower contrast ratio than the display s native value Contrast Ratios in the range of 50 1 to 500 1 can be selected Note If the selected contrast ratio is higher than what the display is actually capable of achieving then the display will calibrate to the highest possible contrast ratio If a specific Contrast Ratio is selected it is recommended that the number of Calibration and Measurement Steps be set to at least 32 in the Preferences dialog Contrast Ratio Black Level Q A 500 1 450 1 400 1 350 1 300 1 250 1 200 1 150 1 100 1 75 1 50 1 16 SPECTRAVIEW II USER S GUIDE Custom Gamma Curve dialog Custom Gamma Curve 6 iQ f sRGB L NTSC Video SMPTE 240M Import Output Luminance Input Level The Custom Gamma Curve dialog is accessed by clicking the Edit button in the Gamma Curve section of the Edit Calibration Target dialog Advanced response curves can be selected from presets or custom curves can be created by importing a table of values The following preset curves are available e SRGB A curve based on the sRGB specification that includes the off
48. n How often do need to calibrate my monitor Answer The answer will depend on how critical a color accuracy is necessary how long the monitor is used per day environmental conditions and the characteristics of each individual monitor Some users working in highly critical color applications may calibrate their displays every couple of days Others may only need to do it once a month The recommended and default re calibration period is every 2 weeks The Validate Calibration feature can always be used to verify the display s white point and Intensity and determine if the monitor needs to be re calibrated Always remember to allow the monitor sufficient time to warm up and reach optimum color performance before performing any color critical work or calibrating the display Question 2 Mac OS only Why can t use the ColorSync control panel to switch between different display calibrations like can do with other monitors Answer When used with the SpectraView software NEC display monitors store all of the necessary color adjustments internally including the 10 or 12 bit Look Up Tables The ColorSync utility switches the display color settings by changing the Look Up Tables in the video graphics adapter The ColorSync profiles generated by SpectraView contain linear Look Up Tables for the video graphics adapter Therefore the SpectraView software must be used to update the display monitor Question Mac OS only I m using
49. ns link It is not necessary to manually configure the monitor as all of the necessary settings are made by the software e High bit depth internal Look Up Tables LUTs each LCD display monitor supported by SpectraView ll features three internal 10 12 or 14 bit LUTs depending on the model These tables allow very precise adjustments to be made to the display s Tone Response Curve without reducing the number of displayable colors or introducing color banding artifacts e Multiple Calibration Sets Different display monitor calibrations can be instantly loaded allowing quick and easy switching between different calibration settings without the need to re calibrate the display Each time a calibration set is loaded the necessary monitor settings and ICC ColorSync profiles are automatically updated e Informative At the end of each display monitor calibration an information window is displayed which shows the results of the calibration and includes a wealth of information about the display such as the measured color gamut grayscale color tracking Delta E and luminance values Additional information about the display monitor such as the model name serial number and the total number of hours that it has been in use are also displayed e Calibration status validation SpectraView will query each calibrated monitor to see if any controls have changed since the last calibration If anything has changed the previous calibrated state can be re
50. olor sensors are e X Rite GretagMacbeth Eye One Display V2 e X Rite GretagMacbeth Eye One Pro e X Rite ColorMunki e Datacolor Spyder3 These measurements are useful in determining the optimal viewing conditions for the area surrounding the display monitor Ideally the ambient light level and color temperature should not influence the viewing of images on the display screen Follow the instructions on screen for configuring the color sensor for Ambient Light measurement mode Measurements are taken every few seconds and updated on the display as both a Luminance value and approximate color temperature value Note The Datacolor Spyder3 ambient light sensor measures luminance only and not color temperature 32 SPECTRAVIEW USER S GUIDE Monitor Settings window Monitor Settings Power LED Indicator LED Color Blue C Green LED Brightness Maximum ColorComp Screen Uniformity Correction M Use ColorComp Correction Level I Minimum Maximum White Screen Background The Monitor Settings window provides access to some of the display monitor control settings if supported by the display The Power LED Indicator controls can be used to change the color of the LED and also adjust the brightness The brightness can be reduced as necessary in dim environments if the LED is distracting The ColorComp control adjusts the screen uniformity correction applied to the display in or
51. on into another language or format The above is not an inclusive statement of the restrictions imposed on you under the Copyright Act For a complete statement of the restrictions imposed on you under the copyright laws of the United States of America see Title 17 United States Code Revision 100414 3 SPECTRAVIEW USER S GUIDE HARDWARE LIMITED WARRANTY NEC DISPLAY SOLUTIONS warrants the SpectraView Hardware hereinafter Product or Products to be free from defects in material and workmanship and subject to the conditions set forth below agrees to repair or replace at NEC DISPLAY SOLUTIONS s sole option any part of the enclosed unit which proves defective for a period of three 3 years from the date of first consumer purchase Spare parts are warranted for ninety 90 days Replacement parts or unit may be new or refurbished and will meet specifications of the original parts or unit This warranty gives you specific legal rights and you may also have other rights which vary from state to state This warranty is limited to the original purchaser of the Product and is not transferable This warranty covers only NEC DISPLAY SOLUTIONS supplied components Service required as a result of third party components is not covered under this warranty Service required as a result of abuse or improper usage is also not covered under this warranty In order to be covered under this warranty the Product must have been purcha
52. onitor 1 NEC LCD2180U DDC CI Disconnect Save Report As Software Wersion Calibration Status Degauss Auto Setup Target Gamma Type Monitor Power On Time at last calibration Factory Reset Last calibration Hext Calibration Due Color Reset Geometry Reset Calibration Sensor S M Average Low Light hile ature ments Edit Asset ags tring Generate profile after calibration Advanced Options Automatically save profile Set as Adobe Photoshop Monitor Profile Yes Read All Settings Set as Windows System Monitor Profile Unlock OSD Lock Level Don t Look Power State B Orn Calibration Results Parameter Target Calibrated C Off Parameter Tag Spectra view Information 1 0 0 Calibrated Untitled Target DICOM Curre 69 Days 3 Hours 1659 Hours 23075 01 33 14 5 Gretag iOne Display 2 103163 Yes A tu Wu 2 7 fu tu J an White Point tky 9312 Help White Point CIE xy 0 283 0 297 0 283 0 297 Example metadata report showing the SpectraView settings using the Single Connection feature 46 SPECTRAVIEW II USER S GUIDE Test Pattern Guide The SpectraView software includes several test patterns that are useful in evaluating the monitor calibration It is also good practice to use the Test Patterns to quickly visually verify the integrity of the calibration A pattern based on the DIC
53. operate 34 SPECTRAVIEW USER S GUIDE Calibration Overview Introduction to display monitor calibration Computer display monitors display images by giving off light from the screen On LCD display monitors light is emitted from a backlight source such as fluorescent lamps or array of LEDs Light Emitting Diodes and passes through individual red green and blue filters for each pixel on the screen Combining red green and blue light known as additive primary colors creates the color that appears as an image on the screen Different colors are displayed by varying the relative brightness of the three additive primary colors The range of colors that can be represented on a display is Known as the color gamut Printers create images by applying inks or dyes known as colorants to paper These colorants absorb or subtract light of certain wavelengths stopping it from being reflected Cyan magenta and yellow colorants known as subtractive primary colors are used to create color prints Each colorant absorbs light of its color complement For example magenta ink absorbs green light while cyan ink absorbs red light and yellow ink absorbs blue light Sometimes an additional black colorant is used to improve the overall color gamut possible with a printer It is because of these fundamental differences between displaying an image on a computer display monitor and printed media that a Color Management System such as Apple Colo
54. play was not able to actually achieve the Target s specified Intensity value then this will result in large Delta E values Delta E Average shows the average of all the calculated Delta E values Maximum shows the maximum of all the calculated Delta E values Include Dark Values selects if the graph and average Delta E value calculation include measurements taken near absolute black having a luminance of less than 5 cd m on the display Typically these values are not included since the low luminance can cause measurement errors that may cause artificially high Delta E values to be shown Selecting this option will cause all measured values to be included Show Average shows the average Delta E value as a vertical line on the graph display 28 SPECTRAVIEW II USER S GUIDE Information window DICOM Conformance tab e090 Information Display 1 LCD3090WQxi Summary ColorGamut 4 Curves Color Tracking DICOM Conformance Graph 69 JND per DDL Contrast Response JND per DDL Average 2 324 Std Dev 0 125 M Show Average Mi Show Linear Fit Contrast Response Max Error 2 25 JND per DDL at JND Index 7 1 en Mods 0 32 64 96 128 160 192 224 256 Digital Driving Level The DICOM Conformance tab shows graphically and numerically how well the calibrated display conforms to the ideal DICOM Digital Imaging and Communications in Medicine response when a DICOM Target curve of is used The
55. rSync or Microsoft Image Color Management and acolor calibrated display monitor are necessary The Color Management System ensures that what is displayed on a monitor is representative of what will be printed In order to accurately view and exchange images with others with confidence that the images look identical when displayed on different systems and at different locations the display monitors used should be calibrated to a known state The Color Management System being used must also know the current state of the monitor so that it can determine how to accurately display images on that particular monitor Once the display has been calibrated and the Color Management System knows the color characteristics via the use of the CC ColorSync monitor profile the display can be used to preview or soft proof what images will look like when printed In order to do this the Color Management System must also know the color printing characteristics of the printer being used This is usually done by an ICC printer profile or Printer Color Separation Tables supplied by either the printer manufacturer or a third party Various desktop publishing and image editing software packages such as Adobe Photoshop have CMYK preview modes to soft proof images It is important to be aware of the limitations of soft proofing Many factors will limit the accuracy to which prints will match what is displayed on the screen The accuracy of the printer profile or color separ
56. ration The current state of the display monitor can be measured and compared to the currently selected Target in order to quickly determine if the current calibration is still accurate or if the display should be recalibrated A series of measurements will be taken on the display and a brief report will be shown of the results The Information window will also be updated with a more detailed analysis of the results Note Several factors can influence the results of the validation process and a Delta E values of 3 5 do not always indicate that the display needs to be recalibrated Even very slight differences in the positioning of the sensor from when it was calibrated and the length of time the monitor has been powered on and the basic measurement repeatability accuracy of the sensor itself all impact the results Also keep in mind that the Delta E value is comprised of the luminance and color difference Differences in color are much more critical than a difference in relative luminance 40 SPECTRAVIEW II USER S GUIDE Outside of SpectraView Using ICC ColorSync Monitor Profiles The ICC ColorSync monitor profiles generated by SpectraView are used to inform the Color Management System of the color characteristics of the display monitor Color Management Systems use this information to determine how to display images on screen Depending on the image editing software package being used profiles for printers and scanners can also be utilize
57. rements taken during production of the display monitor to encode the color gamut information in the generated ICC profile These measurements may be more accurate than those of some color sensors when measuring wide color gamut displays Defaults Cancel OK Generate ICC Profile after calibration selecting this will automatically generate an ICC ColorSync monitor profile after the display is calibrated This option should be checked for most applications Set as Windows Color Management System Monitor Profile A Windows version only selecting this will automatically associate the generated ICC monitor profile with the Windows Color Management System This option should be checked for most applications ICC Profile file name selects how the ICC Profile file is named when an ICC Profile is generated for example after calibration e Set Automatically the profile will be automatically given a name and description This is the default setting as it is not normally necessary to manually name the profile file Prompt for file name and description a prompt will appear and the file name and description can be entered manually Storage Location Mac OS only specifies where the generated ICC ColorSync profiles are stored Options are e Per User of this computer the profile is stored in the User s profile folder Profiles in this folder are typically not accessible from other user accounts e Shared by al
58. revity CIE The Commission Internationale d Eclairage International Commission on Illumination An organization that sets many of the standards used in color and color measurement CIE Lab A color space that is relative to a reference white point The L value represents light ness a represents Red Green and b represents Yellow Blue Lab is almost perceptually uni form in that differences between colors expressed in Lab correlate to equally perceived color differences CIE uv chromaticity coordinates Coordinates in the CIE uv color space which are derived directly from CIE xyY color space CIE uv is more perceptually uniform than CIE xy CIE xy chromaticity coordinates Coordinates in the CIE xyY color space representing color independent of luminance CIE xyY A standard color space in which the Y component represents luminance The x and y components represent color Color Gamut See Gamut Colorimeter An optical measurement device used to measure color that responds to light by separating it into red green and blue components Color Management System CMS Software used to control the handling of color between scanner monitor and printer ColorSync is an example of a CMS used on the Macintosh Mi crosoft Image Color Management ICM is an example of a CMS used on Windows systems 49 SPECTRAVIEW II USER S GUIDE Color Separation The separating of a color image into the cyan magenta yellow
59. rofile interface Display Luminance Units Candelas Foot Lamberts W Automatically load settings on Target change Automatically loads the most recent Monitor Caibration Settings when a different Target is selected if a calibration for that Target has been performed previously M Confirm display calibration status each time application is launched Queries the display monitor each time the application is launched to see if any of the settings have changed since the last calibration If the settings have been changed a warning message will be displayed and the last calibration settings can be reset Checking the monitor settings will take several seconds each time the application is launched Defaults Cancel 6 OK J Luminance Units selects the units that luminance values are displayed in Options are e Candelas cd m e Foot Lamberts fL Automatically load settings on Target change automatically loads the most recent Monitor Calibration Settings when a different Target is selected and will generate a new corresponding ICC Profile Using this option allows different Targets to be selected and the monitor will be automatically configured Confirm display calibration status each time application is launched selects if the current monitor settings should be checked and compared with the settings for the last calibration when SpectraView is launched If the monitor settings are different a warning message will be d
60. s to be performed the display s Tone Response Curves must be accurately measured and compensated for SpectraView uses the color sensor to automatically measure the Tone Response Curves of the display Note If you are unsure what gamma value to use for a Target try 2 2 which is the most popular on Windows and on Macs for most applications A value of 1 8 is popular for some printing applications on Macs Normally a standard Gamma value is required when working with images For example the SRGB standard color space target specifies a display Gamma value of 2 2 Since the Gamma value of the display may be different than the required Gamma value a correction needs to be applied so that the apparent display Gamma matches that of the required Target In SpectraView this correction is applied to the LUTs Look Up Tables inside the monitor SpectraView also uses the monitor s LUTs for targets that have Tone Response Curves which do not follow a normal Gamma curve An example is DICOM which uses a curve that changes shape based on how bright the display is White Point The White Point specifies the color of pure white on a display Since there is no unique perceptual or physical definition of what white is it must be defined in terms of a standard or device independent color space to be measured and reproduced There are several methods of specifying a white point including using a blackbody radiator color temperature or as a loca
61. sed in the U S A or Canada by the original purchaser This warranty only covers Product distribution in the U S A or Canada by NEC DISPLAY SOLUTIONS No warranty service is provided outside of the U S A or Canada Proof of Purchase will be required by NEC DISPLAY SOLUTIONS to substantiate date of purchase Such proof of purchase must be an original bill of sale or receipt containing name and address of seller purchaser and the serial number of the product NEC DISPLAY SOLUTIONS SHALL NOT BE LIABLE FOR DIRECT INDIRECT INCIDENTAL CONSEQUENTIAL OR OTHER TYPES OF DAMAGES RESULTING FROM THE USE OF ANY NEC DISPLAY SOLUTIONS PRODUCT OTHER THAN THE LIABILITY STATED ABOVE THESE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES OR THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU This Product is warranted in accordance with the terms of this limited warranty Consumers are cautioned that Product performance is affected by system configuration software the application customer data and operator control of the system among other factors While NEC DISPLAY SOLUTIONS Products are considered to be compatible with many systems specific functional implementation by the customers of t
62. selected using the listboxes 14 SPECTRAVIEW II USER S GUIDE Edit Calibration Target Configuration dialog El Edit Calibration Target White Point Gamma 2s Wit Edit O onitor Native Gamma Gamma Curve Value Color Temp 6506 K 0 000 A uv fa CIE 0 3127 y 0 3290 ae IE xy x 0 0 329 T i C DICOM Curve Intensity 056 Scale Factor Maximum Possible 1 00 w Specific Level C Custom Curve 100 0 cd m Edit Contrast Ratio Black Level 0 Default B The Edit Edit Calibration Target dialog is accessed by clicking the Edit Target button on the main SpectraView Il window or by selecting Target from the Edit menu Custom Targets can be created using this dialog After a new Target has been created the display must be Calibrated to it It is possible to share Target files with other users of SpectraView on both Windows and Mac OS platforms White Point White Point selects the Target white point for the calibration gt Calibr Several popular industry standard White Point values such as D50 and D65 are provided White Pa D50 D55 A Native option is available that can be used to leave the White 5 Edit Point at the display s native characteristic white point This is Ea Re 0 000 Aw useful when the maximum possible luminance is desired but 4500K 7 ay the white point is not critical 5000K 3127 y 0 3290 5500K A custom white point can be specified b
63. set transition and slope components e L Acurve based in the Lab specification The L curve is intended to be more perceptually uniform than a simple gamma value curve e NTSC Video A curve based on the SMPTE 170M specification for NTSC that includes the offset transition and slope components e SMPTE 240M A curve based the SMPTE 240M specification for 1125 line HD video that includes the offset transition and slope components Custom curves can be created and imported into SpectraView by creating a text file with a list of numerical values The text file must conform to the following specifications e Must contain between 3 and 256 values e Each value must be on a separate line e The first value must be 0 e Values must be monotonically increasing When imported the values will be automatically scaled and interpolated to create a Target curve 17 SPECTRAVIEW II USER S GUIDE Custom White Point dialog Custom White Point White Point Measurement Area Black Body 6506K K 0 0001 Auv CIE Coordinates gt 3497 o y 0 3290 6l Measure Visual Match Adjust the screen color visually to match your reference Click Measure when done n Red 255 Green 255 69 Blue 255 Reset l White screen background Cancel 06 The Custom White Point dialog is accessed by clicking the Edit button in the White Point section of the Edit Calibration Targ
64. stored automatically e Flexible SpectraView provides many features and options that make it flexible enough to be used in a large variety of applications including full DICOM support for medical imaging The display luminance can be adjusted to either a specific value or to the maximum possible that the display can achieve Network support Windows only SpectraView integrates with the NEC NaViSet Administrator network software available separately from your NEC representative to provide remote network access and monitoring of display monitors NaViSet Administrator is able to read display and log the current 10 SPECTRAVIEW II USER S GUIDE calibration settings and status of displays a LAN This feature is particularly useful for large installations where central monitoring and asset management is needed e Monitor locking Once calibrated the OSD On Screen Display controls for the display monitors can be locked to prevent accidental or unauthorized adjustment which may invalidate the calibrated state of the monitor e Monitor Profiling After calibration the display is automatically profiled and highly accurate ICC ColorSync color profiles are generated and automatically registered with the Color Management System These profiles use the Bradford Chromaticity Adaptation matrix e Colorimeter function The software features a Colorimeter function which allows direct measurements to be taken by the color sensor and
65. that the monitor is associated with the correct Windows desktop display 44 SPECTRAVIEW II USER S GUIDE Problem No supported calibration sensor was detected Solution e Try reconnecting the calibration sensor and click the Auto Detect button in the Preferences dialog to re detect the sensor e It may be necessary to close and re launch the SpectraView application 12 the drivers for the X Rite iOne devices are installed by the SpectraView setup application Drivers for other devices must be installed manually Problem Severe color banding appears after calibrating on images and when the test pattern is shown Solution e Always use a DVI video output if possible e If an analog video signal must be used perform the following steps once prior to calibration 1 Display something on the screen that has both full black and full white such as the Test Pattern in SpectraView 2 On the monitor s On Screen Display select and operate the AUTO CONTRAST control 3 Proceed with the calibration Problem 44 Windows The ICC profile generated by SpectraView does not appear to be correctly installed and recognized in Windows Solution e This problem may occur especially when using a multi monitor configuration In some cases updating the video driver may fix this issue e The profile can be manually assigned if necessary as follows 1 In the Windows Display Properties control panel select the Settings tab and
66. the accuracy of low luminance measurments by taking several measurements and averaging them Selecting this option will increase the monitor calibration time Defaults Cancel 6 Preferences dialog Calibration Sensor tab Sensor Type selects the model of calibration sensor to use and shows the current model being used Auto Detect attempts to detect the selected model of calibration sensor SpectraView will automatically detect the calibration sensor when the application is started however if the sensor was not connected at that time or if it was being used by another application then it may be necessary to re detect it Note that if the sensor was not attached when SpectraView was launched then it may be necessary to exit the SpectraView application and launch it again Model and Serial shows the model and serial number of the currently selected calibration sensor device Average low light measurements will average several color sensor measurements to improve the accuracy of low luminance measurements below 10 cd m Selecting this option will increase the monitor calibration time 19 SPECTRAVIEW II USER S GUIDE Preferences dialog Calibration tab SpectraView Il Preferences Calibration Sensor Calibration ICC Profile Interface Display Calibration and Profile steps 32 Default HH Sets the number of steps used to measure the monitor grayscale during calibrat
67. the other output connector e Always use a DVI video output if possible Mac OS e See the README file included with the software for further information about any specific incompatibilities or issues Note that some Macs require at least OS 10 5 2 in order support the functionality necessary with SpectraView AA Windows e Some video graphics adapter cards may not support the necessary functions for SpectraView to communicate with the display monitor For Windows systems verify that the video graphics adapter is supported by SpectraView by checking the Windows Graphics Chipset Compatibility Information See the README file included with the software for further information e Install the latest video drivers for the video graphics adapter card e Communications with the display monitor requires a special driver to be installed This is installed and configured when SpectraView is installed however any of the following changes may necessitate that SpectraView be re installed to re configure the driver e Updating the video graphics adapter card driver e Changing the monitor model e Changing the video port that the monitor is connected to e Check the display configuration by clicking the Display Configuration button In the Display Configuration dialog confirm that your model of display monitor is listed If it is not listed then there is a problem communicating with and detecting the display monitor If it is listed confirm
68. the results displayed in a variety of different formats e Ambient Light Measurement function Allows measurements to be taken of the ambient light of the viewing environment surrounding the display monitor This is useful in determining the optimal viewing conditions for the display monitor so that the ambient light level and color do not influence the viewing of images on the screen 11 SPECTRAVIEW II USER S GUIDE Dialogs Settings and Menus Main SpectraView II window The SpectraView II window shows the current settings and status of the display calibration All of the features of SpectraView are accessed from this window and the menus Edit Target Opens the Calibration Target Configuration dialog box used to modify Target settings Open Target Opens a Calibration Target file Targets listbox Selects an existing 40 0 Target setting Target Settings Targets that have been calibrated have w Broadcast Video ver SpectraView Il Save Target saves the current Target Settings to a Calibration Target fil green check mark White Point 5 di 4 Gamma 2 20 it Intensity Maximum Contrast Ratio Monitor Default Calibration Status Calibrated scene On Last 12 8 08 1 32 PM urns e alsSpla calibration nek a O Previ Monit Calibration pen revious onitor Calibration T be loaded and viewed l Shh The display settings and Calibrate ERA 0 profi 08
69. tion in a device independent color space SpectraView allows the white point to be specified either as a black body radiator color temperature in Kelvin as a CIE standard illuminant or as CIE xy chromaticity coordinates A White Point expressed as a black body radiator color temperature in Kelvin represents the light given off by an object known as a blackbody as it is heated to a given temperature Low color temperatures such as 5000K are reddish while higher color temperatures such as 9300K are bluish A color temperature of 6500K is considered to be neutral white A CIE Standard Illuminant is a defined white color based on a known light source In SpectraView the D or Daylight Illuminant series can be used to specify a white point Daylight IIluminants are named according to their corresponding correlated color temperature For example D50 is very close in color to a 5000K blackbody radiator 37 SPECTRAVIEW USER S GUIDE Intensity Intensity specifies the luminance or brightness of white when displayed on the screen The maximum Intensity value of the display will depend on the color temperature of the White Point selected the type of monitor and its age The choice of Intensity value will depend on the application and viewing environment If the display is being used in a very bright environment and there is no visual reference such as a proof in a lightbox then the Intensity generally can be selected to the maxim
70. to SpectraView Overview Designed for professionals with color critical applications SpectraView combines the award winning NEC display monitor technology with a color measurement sensor and sophisticated software The result is highly accurate reliable repeatable and feature rich display calibration and profiling solution The SpectraView system uses a color sensor to take color measurements of the display screen during calibration The software analyzes these measurements and sends color adjustment commands directly to the display monitor This means that color adjustments are made in the monitor rather than in the video graphics adapter resulting in full use of the number of colors available on the graphics adapter and a much brighter image with the maximum possible color gamut With SpectraView the video graphics adapter is not used at all to make any gamma or Tone Response Curve corrections to the display so the full color resolution and fidelity of the system is maintained Main Features and benefits SpectraView provides the following features and benefits e Automatic calibration SpectraView communicates with the display monitors using Display Data Channel Command Interface DDC CI which is a two way communications link between the video graphics adapter and display monitor using the normal video signal cable No extra cables are necessary All adjustments to the monitor settings are done automatically using this communicatio
71. ttings then the resulting calibration will have a contrast ratio of 320 1 38 SPECTRAVIEW USER S GUIDE Using SpectraView Launching NEC Display Solutions Windows Select SpectraView II from the NEC Display Solutions program group on the Windows Start menu Mac OS Double click the SpectraView II application icon in the Applications folder As SpectraView launches it will automatically search for any supported displays and a supported color sensor SpectraView is unable to detect either a supported display or the last selected color sensor an error message will be displayed and the Calibrate button will be disabled Refer to the Troubleshooting section of this manual Selecting a calibration Target A Target specifies the color characteristics of the display for the calibration process A Target can be either predefined or custom defined Existing Targets can be selected in the main SpectraView window from the Target listbox 00 K SpectraView Target Settings V o Broadcast Video r DICOM Blue 7 DICOM Clear Digital Cinema J Photo Editing Mum Print Standard tor Default sRGB Emulation Status Calibrated a CA JAIJAA 4 84 MAS Selecting a Target will automatically configure the White Point Tone Response Curves Intensity and Black Level if applicable The choice of Target depends on the particular application and viewing conditions such as the ambient lig
72. ues are derived by calculating the distance between two colors in Lab color space using the CIE 94 formula A Delta E value of 1 indicates a just perceptual difference between two colors Delta uv A uv A measure of how different two colors are irrespective of luminance In SpectraView Delta uv values are used to indicate how far a white point is from the blackbody locus CIE uv color space is used instead of CIE xy because it is more perceptually uniform or linear Device Dependent Color A color space that is tied to the color rendering capabilities of a specific device Examples are RGB color spaces that depend on the phosphor or filter colors used on the display Another example is CMYK color spaces that are dependent on the types of inks and paper used Device Gamut The range of colors that a device can produce Device Independent Color A color space that can describe color independently of the capa bilities of a specific device An example is the CIE xy color space DDC CI Display Data Channel Command Interface is a two way communications link be tween the video graphics adapter and display monitor using the video signal cable DICOM Digital Imaging and Communications in Medicine Foot Lamberts fL A unit of luminance One foot Lambert is equal to 1 Candela per meter squared divided by 10 76 T approximately 3 43 50 SPECTRAVIEW USER S GUIDE Gamma The relationship between the input video signal to
73. um possible setting However if the display is being used in controlled lighting environment and there is a visual reference being used then normally a lower specific Intensity value is used Using a specific value will allow the display to be calibrated to the same value each time provided it is within the capable range of the display Contrast Ratio The Contrast Ratio of the display is the ratio of the measured Intensity to the measured Black Level The Black Level is the luminance or brightness of black when displayed on the screen For LCD monitors the minimum or native Black Level is typically fixed in ratio to the Intensity value due to the display technology SpectraView allows the Contrast Ratio to be selected for applications that require a specific contrast ratio However the calibrated contrast ratio can not be higher than the native contrast ratio since the minimum Black Level that the display can achieve is limited by the display technology For most applications the highest possible Contrast Ratio is most suitable and can be achieved by selecting Monitor Default as the Contrast Ratio Specific Contrast Ratios in the range 50 1 to 500 1 can be selected Note If the selected contrast ratio is higher than what the display is actually capable of achieving then the display will calibrate to the highest possible contrast ratio For example if you select 500 1 but the display only capable of say 320 1 with the current Target se
74. ure the grayscale when the calibration was performed ICC Profile File Name shows the name of the ICC ColorSync profile if one was generated after the display was calibrated Description shows the description tag text of the CC ColorSync profile if one was generated after the display was calibrated Display Monitor Model shows the model name of the currently selected display Serial shows the serial number of the currently selected display Firmware shows the internal firmware version of the currently selected display Current Usage shows the total number of hours that the currently selected display has been in use Last Calibration shows the number of hours that the currently selected display has been used since it was last calibrated Calibration Date shows the date and time that the monitor was last calibrated to the currently selected target Calibration Sensor Model shows the model name of the calibration sensor used when the calibration was performed Serial shows the serial number of the calibration sensor used when the calibration was performed 25 SPECTRAVIEW II USER S GUIDE Information window Color Gamut tab 6068 9 _Information Display 1 LCD3090WQXi Summary gt ColorGamut 4 Curves Color Tracking DICOM Conformance 2 A Show Gamut Display Colorspace 69 CIE xy QO CIE u v Show black body curve _ Show Target white point The Color Gamut tab graphically
75. usted some of the monitor controls to get a better color match for my particular application What happens the next time calibrate the monitor Answer The manual adjustments will be reset by the calibration process In general it is not a good idea to manually adjust the monitor after calibration because it not only invalidates the calibration and ICC ColorSync profile but also means that the adjustments will be lost the next time the monitor is calibrated you still feel it is necessary to tweak the display after calibration a much better approach is to create a new Target file based from the measurements of the display after it has been manually adjusted That way the monitor will be automatically calibrated to that particular set of characteristics the next time it is calibrated Use the Custom White Point tool to measure and set the white point and Intensity values 43 SPECTRAVIEW II USER S GUIDE Troubleshooting Installation and Setup Problem Calibrate button is disabled Solution The calibrate button is disabled for either of the following reasons e No supported calibration sensor was detected No supported display monitor was detected See the following sections for further explanations Problem No supported monitor was detected Solution e Verify that the display monitor connected is a model supported by SpectraView II e If more than one video output is present on the computer try connecting to
76. vice must accept any interference received including interference that may cause undesired operation 4 SPECTRAVIEW USER S GUIDE 00 NI OD Oo 11 11 13 16 17 18 18 19 20 1 22 23 23 25 26 27 28 30 31 32 33 33 33 33 33 34 34 36 36 36 7 38 38 38 38 39 39 39 40 40 40 Precautions Supported Display Monitors System Requirements 1 Introduction to SpectraView Overview Main Features and benefits 2 Dialogs Settings and Menus Main SpectraView window Display Configuration dialog Windows version only Edit Calibration Target Configuration Aii Custom Gamma Curve dialog Custom White Point dialog Preferences dialog Preferences dialog Calibration Sensor tab l Preferences dialog Calibration tab Preferences dialog ICC Profile tab Preferences dialog Interface tab Preferences dialog Display tab Information window Information window Summary tab Information window Color Gamut tab Information window Curves tab Information window Color Tracking tab Information window DICOM Conformance tab Colorimeter window Ambient Light Measurement window Monitor Settings window Menus 8 File menu Edit menu Tools menu Help menu Introduction to display monitor calibration 3 Calibration Overview About Targets Gamma and Tone Response Curves TRC W
77. will automatically configure the display and re generate the I CC ColorSync profile if one was generated when the calibration was performed This feature can be used to manually switch between different monitor calibrations with different Target settings or to restore a particular calibration Note The Monitor Calibrations are specific to each individual display monitor and can not be used to load the calibrated settings of one display monitor into another even if they are the same model This is because of the individual tolerances and characteristics of each display monitor Display The Display group is used to select the display monitor to calibrate if more than one display is present on the system Displays can be selected from the listbox and the Target Settings and Calibration status will be automatically updated Note that Target Settings are independent for each monitor when multiple monitors are used so each display monitor can be calibrated to different Target settings if desired 1 4 Display Configuration button 4 Windows version only opens the Display Configuration dialog which is used to configure j SpectraView Il if more than one display is used on the system 13 SPECTRAVIEW II USER S GUIDE canranon Un Ss See the following section Display Display 1 LCD2690WUNi Display Configuration dialog 44 Windows version only This Display Configuration dialog is accessed either from the E
78. y clicking the Edit menses 6500K g button to open up the Custom Color Temperature dialog om Mets sible gh K Native 00 peg Tred m Gamma Curve Gamma Curve selects the desired tone response curve of the calibrated display Options are e Monitor Native Gamma No correction is applied and the display s Look Up Tables are set to linear e Gamma Curve Value The response curve will follow a simple gamma curve Values between 1 0 and 3 0 can be entered A gamma value of 2 2 is the most popular for most applications e DICOM Curve The response curve follows the DICOM Digital Imaging and Communications in Medicine specification This response curve is aimed at medical use however it can be used for other applications The goal of the DICOM response curve is to have a visually linear display response SPECTRAVIEW USER S GUIDE Use Scale Factor The DICOM response curve shape is based on the measured black level and Intensity If the black level or Intensity of the display changes then the shape of the DICOM response curve also changes If a display is not expected to be re calibrated for a period of several months this feature can be used to increase the longevity of the DICOM calibration using the knowledge that the displays brightness will decrease slightly as it ages By scaling the black level and Intensity values used to calculate the DICOM response curve using the Use Scale Factor value the response curve can be bas
79. y com multiprofilen Note This version of SpectraView II software does not yet support communicating with the display via USB therefore DDC CI must be used A future update to SpectraView II will add this and other features new to the NEC MultiSync PA Series models 48 SPECTRAVIEW II USER S GUIDE Glossary Achromatic Neutral in color having no hue Additive Primaries Red green and blue light that when combined in different relative inten sities produces different colors See also Subtractive Primaries Backlight the internal light source for a Liquid Crystal Display such as fluorescent lamps or array of LEDs Light Emitting Diodes Blackbody A hypothetical object that absorbs all incident radiation thus any radiation e g light coming from a blackbody must be emitted from it and not reflected Blackbody Radiator Locus The curved formed when the color of light radiated from a black body is plotted at different temperatures on a color space such as CIE xyY Black Level The luminance or brightness of black when displayed on the screen Calibration The process of bringing a device such as a display monitor to an absolute stan dard to ensure consistency over time and with other similarly calibrated devices Candelas cd An international unit of light intensity Luminance can be described in units of Candelas per meter squared cd m but is often referred to as just Candelas or Nits for sake of b
80. yne p Calibrates the currently l for the display will be set selected display to the automatically currently selected Target Settings Display listbox Selects which display to calibrate if more than one display is present 12 SPECTRAVIEW II USER S GUIDE Target Settings The Target Settings group shows the current calibration Target parameters for the currently selected display monitor The Target Settings can be modified saved and loaded using the Edit Open and Save buttons The Target listbox shows all of the available Targets When the display has been calibrated to a particular Target a green check mark appears next to the Target name indicating that the calibration is available Different calibrations can be automatically restored by selecting different Targets that have been calibrated This makes it easy to quickly change between different calibrated Target settings The green check mark will change to yellow once the calibration for that Target has passed the recommended recalibration time indicating it is time to recalibrate that particular Target White Point shows the Target White Point Gamma shows the Target gamma or Tone Response Curve type Intensity shows the Target display intensity value Contrast Ratio shows the Target contrast ratio Calibration The Calibration group shows the current calibration status of the currently selected display monitor and is where the monitor calibration proc

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