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Hue/Saturation

The Hue/Saturation command lets you adjust the hue, saturation, and lightness of color components in an image. Additionally, you can adjust all the colors in an image simultaneously. This command can work in two ways:

  • To adjust colors in an image that appears slightly out of phase or skewed toward a color, such as an image that appears to have a blue overcast
  • To create stylistic changes by dramatically changing colors in an object, such as trying out different combinations of colors in a logo

When combined with a selection command (such as Color Range), the Hue/Saturation command can be used to enhance colors selectively in an image.

Let's give the command a try.

  1. Close any open files, and then open the file Ch10_Hue_Saturation.tif from the Chapter 10 folder (see Figure 29). You'll subtly tweak the color in the motorcycle.
  2. Choose Select > Color Range and click the motorcycle body to make an initial selection (see Figure 30). Hold down the Shift key to add to the selection. Adjust the Fuzziness slider to soften the selection. Use the Localized Color Clusters option to further constrain the selection. Click OK when you have a suitable selection.
  3. Click the Hue/Saturation button in the Adjustments panel to add an adjustment layer (see Figure 31).
  4. The two color bars at the bottom of the dialog box represent the colors in the color wheel. The upper bar shows the initial color; the lower bar shows the new color. Drag the Hue slider to the left until maroon appears under red (see Figure 32).
  5. Additionally, you can adjust Saturation (the intensity of the color) and Lightness (which adds white or black to the image). Increase Saturation to +15 and decrease Lightness to -20. Figure 33 shows the results.

Tinting a Photo

You can also use the Hue/Saturation command to tint an image. If you're working with a grayscale image, you need to convert it to an RGB image first.

  1. Close any open files, and then open the file Ch10_Tint.tif from the Chapter 10 folder (see Figure 34).
  2. Add a Hue/Saturation adjustment layer.
  3. Click the Colorize box to tint the image (see Figure 35).
  4. Adjust the Hue slider to try different color combinations. Adjust Saturation and Lightness to refine the tint.
  5. The adjustment layer automatically has a layer mask attached, which allows you to mask the effect. Click the Layer Mask icon for the Hue/Saturation adjustment layer (see Figure 36).
  6. Select your Brush tool and press D to load the default colors of black and white.
  7. With a small black brush, paint the flowers so the original red shows through (see Figure 37). If you make a mistake, press X to toggle back to white for touch-up.
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