Applying special color effects to images
The Desaturate, Invert, Equalize (Photoshop), Threshold (Photoshop), and Posterize (Photoshop) commands change colors or brightness values in an image but are typically used for enhancing color and producing special effects, rather than for correcting color.
Special color effects A. Original B. Desaturate C. Invert D. Equalize E. Threshold F. Posterize G. Gradient Map
Note: You can also make color adjustments by blending colors from different channels. (See Mixing color channels (Photoshop).)
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