Color Section
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1. JS ee The Gimp User s Manual Color Section But you can also use a gradient as we have done by coloring the baby s shirt pe ak a eee nee _ el Sree Paes ae Fn TS EEEF P ra Shits r ea ness The Gimp User s Manual Color Section Scatter HSV adds color noise to the image Instead of inverting the colors like in the right click Image Colors Invert command the Value Invert filter will invert the brightness value of each pixel The Gimp User s Manual Color Section EDGE DETECT All of the edge detect filters produce colorful edges Laplace Sobel The Gimp User s Manual Color Section And with the Log filter you can make instant cartoon pictures Sess Se LIGHT EFFECTS Most of the light effects such as Flare FX GFlare and Super Nova produce color lens light effects FlareFX GFlare The Gimp User s Manual Color Section Super Nova RENDER Most of the render filters affect color in one way or another Here are some examples of the outcome of the fantastic IFS Compose filter The Gimp User s Manual Color Section The Gimp User s Manual2. the negative film and develop it to positive images using the Invert command With the Posterize com mand you can reduce the number of colors shades in an image making it less naturalistic Invert Posterize Color balance is a useful color correction tool if your image has distorted colors or if you want to change the colors like we have done with the blue duck The Gimp User s Manual Color Section Hue Saturation is perhaps an even better tool for correcting color problems It s also a great tool for chang ing colors As you can see our yellow truck has turned blue without any change in the other colors in the image Curves is another color control tool Here we have turned day into night or is it the other way around Curves Hue Saturation Levels is an excellent tool for enhancing 3 D effects by adding highlights or shadow You can also use it the other way around and make the image flat using less contrast when it comes to color highlights and shad ows Desaturate takes away the color information but you are still in RGB space Desaturate is excellent when you want to accentuate a certain part of the image If the surroundings are desaturated the colored part will catch the viewer s focus Levels Desaturate The Gimp User s Manual Color Section Normalize Contrast Auto stretch and Auto stretch HSV are three ways of enhancing faded or dull color photos Normalize Co
3. COLOR SECTION Color Section THE GALLERY Creating objects You can easily create different versions of the same basic design by using different color modes or by applying a gradient map Thr GNU iraga marija iragai ng pe The Gimp User s Manual Color Section Creating the illusion of glass water and reflection using 2 D image manipulation requires some skill and planning The main difficulty lies in mak ing the composition convincing in the areas where water meets an object and in keeping the balance between reflection glitter and shadow The Gimp User s Manual Color Section Transforming a photo into a drawing is a simple way of creating stunning graphics A sketch is also much more personal than an ordinary photograph To achieve this end there are many different techniques ranging from cartoon style to crayon drawings Just remember that you are the artist and not the computer The Gimp User s Manual Color Section As you can see the different red yellow and white layers really make the horse glow The key as usual is to create several layers and combine them a oe P i vs e Ar i 41 t P The Gimp User s Manual Color Section aide onthe Wid side FX is another favorite Light effects are powerful eye catchers and sometimes you may want to maxi mize your image as in our wild ride image T
4. d The Gimp User s Manual Color Section Color Exchange lets you exchange one color to another You can set the width of the desired color spec trum i e how many shades should be exchanged for the specified color The Colorify effect is like putting a transparent color slide on top of your image The Gimp User s Manual Color Section Color Map Rotation is a powerful color exchange filter Original Rotated The Gimp User s Manual Color Section Filter Pack is the darkroom filter It s perfectly suited for adjusting miscolored photographs i jimi ees oi i te gt a ue e Pea ira a E _ puma win i F a uma an e renr a a fea sae p Ps iial Eriin miah ra m m Co 4 Huy m i j Si 4 _ _ j j aj Sal mcr wien F im ma ei Hra ai Original The Gimp User s Manual Color Section The Gradient Map filter will map an image against a gradient in the Gradient Editor ie Burning_Transparency The Gimp User s Manual Color Section Max RGB will only display the color that has the highest or lowest value Original Min Max The Gimp User s Manual Color Section If you want to colorize an old black and white photo then Sample Colorize is the tool to use You use a sample a color photo as source for colorizing an old black and white photo M h 1 jii ajm Hii peii a ee P oraj panunen ppm
5. dient Editor allows you to create your own gradients where you ll have absolute control over all parameters so this is a very useful tool for advanced image manipulation COLOR If you want to learn to use an image manipulation program like Gimp to its full capacity you must learn how colors work in the digital world and to understand the different color models These pictures will help you understand the Color Models and Pre press chapters ry CHYKE The Gimp User s Manual Color Section Vclbow Vellus teal YIK Gr ci Hed ROG REO NCS color model Complementary colors Complementary colors RGB model Natural model It is essential to understand that different color models devices have different gamut areas An RGB monitor can display many more colors than a printer CMYK can Finally you can perceive more colors with your eyes than a monitor can display The image below visualizes these facts Moar Great BB Peri Garen The Gimp User s Manual Color Section IMAGE MENU The Image menu commands execute most operations in either RGB or HSV color space The Equalize command can be used enhance contrast and to find hidden colors in old fading photos Dark input Output after equalize AM Light input Output after equalize The Gimp User s Manual Color Section Invert will make a color image look like a photo negative This means that if you have a slide scanner scan
6. esaturation ov K N Wiewd Erditu Giniieiniain breraa A i fy Dandelion Haf Erhihitinm Ondine Aaa 258 AA E This duotone image was created using a blue and a yellow channel The Gimp User s Manual Color Section PLUG INS Plug ins commonly referred to as filters are an important part of Gimp Many filters use color transforma tion or affect the colors in the image in other ways Artistic Filters All of the artistic filters affect color However only the Newsprint filter changes the way that color is used The Newsprint filter separates colors either to RGB or to CMYK mode in order to build the half tone pattern of an AM screening printer Color Filters Naturally color filters must be shown in color This section should be your companion when you read the color filters chapter Adjust Fgrd Bkgrd is a simple color rotating filter The Gimp User s Manual Color Section Alien Map is a psychedelic color rotating filter that rotates and phase displaces colors using cosine and sine functions Alien Map only works in RGB color space Alien Map Original Frequency 2 Cosine Phase disp 1 25 The Gimp User s Manual Color Section Alien Map2 has nearly the same functions as Alien Map but this filter also works in HSV color space Here we have aged a green spring leaf prematurely Color Mapping is a more advanced implementation of Adjust Fgrd Bkgr
7. ntrast Auto stretch Auto Stretch HSV The Gimp User s Manual Color Section Compose and Decompose in the Image Channel Ops menu let you compose and decompose images to and from different color models The RGB original to the left has been used for all decompose operations All decomposed images are grayscale images because they are representation of the color models different channels RGB original Value composed as Hue The printed result of each CMY plate The Gimp User s Manual Color Section MODES The color images shown here are a necessary complement to their black and white counterparts which are shown in the Modes chapter Normal Mode Dissolve Mode Lighten Only Saturation The Gimp User s Manual Color Section Comparing Modes Si ae a aan pe x J CPEE b Ane A phy ee i Dp be ee T 2 a J Her Normal Mode color Dissolve Mode color Color Saturation Value A layer containing a green leaf pattern was combined with the portrait layer These images show the differ ence between Color and Hue mode Pi oa E Color The Gimp User s Manual Color Section CHANNELS These figures show the result of adding color to a channel The yellow channel would look like the black and white image to the right if you copied and pasted it to a new image If the yellow image had been a reg ular layer it would look like the gray image after d
8. o make things a bit more surreal we have turned a horse into a leopard Layers is the key to creating images like this one All effects are created by combining a multitude of layers in different ways The Gimp User s Manual Color Section Chevelle Rygi i The Chevelle photo montage is a classic poster art work The technique of making montages is commonly used by graphic designers in advertisements The method of blending two or more images using layers and layer masks is the tool that makes this possible The standard procedure when you create this kind of design is to work with a combination of an illustration program and an image manipulation program If you use both program types you can easily change type face and other objects that are better represented as vector drawings We wanted to show that you can do all of that within Gimp The Gimp User s Manual Color Section PAINT TOOLS When it comes to color tools the color palette is among the more useful Think of it like the palette that you use for making ordinary paintings Choos ing colors from the color dialog is much too ineffec tive and you can t be that sure that you get the same color each time GRADIENTS The Gradient Editor is the key to making smooth color transitions and it is used as a base for many kinds of important operations in Gimp You can use gradients to blend two images through layer masks or as a dis tort map image The Gra
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