CHAPTER 2 IMPROVING DIGITAL PHOTOS Figure 2-37.
CHAPTER 2 IMPROVING DIGITAL PHOTOS Figure 2-37. Make a circular selection around one pupil. Without going too deeply into how colors are represented in the GIMP (see Chapter 
, the goal here will be to remove the red color from the pupil without losing the bright reflection. First, click on the toggle button under R. This will restrict the operation to only the red color. (The eyes of animals sometimes show red-eye in colors other than red; if you re trying to fix a demon bunny or kitty, you may want to leave the setting on Master.) Then slide the Saturation control all the way to the left. Desaturating an image means removing all the color, or making it grayscale, though in this case, we re only removing all of the red. The hue-saturation operation only applies to what s selected, if there s a selection otherwise it applies to the whole layer (you can think of it as applying to the whole image, until you begin working with layers in Chapter 3). That s true of most GIMP operations: if a selection is active, then only what s inside the selection will be changed. With the pupil desaturated, the photo looks much better. The red is gone, and for some photos this may be all you need. But in this case, the pupil looks lighter than it should. I d like to darken it a little.
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