Adobe® Photoshop® 7.0 Classroom in a Book®

Removing a color cast

Some images contain color casts (imbalanced colors), which may occur during scanning or which may have existed in the original image. This photograph of the window has a blue cast. You’ll use the Auto Color feature in Photoshop 7.0 to correct this. (ImageReady does not include the Auto Color command, so this task must be done in Photoshop.)

Note

To see a color cast in an image on your monitor, you need a 24-bit monitor (one that can display millions of colors). On monitors that can display only 256 colors (8 bits), a color cast is difficult, if not impossible, to detect.

For an illustration of color casting, see figure 3-1 ...