The command automatically
stretches the histogram values in the active layer. For each channel
of the active layer, it finds the minimum and maximum values and uses
them to stretch the Red, Green and Blue histograms to the full contrast
range. The bright colors become brighter and the dark colors become
darker, which increases the contrast.
This command produces a somewhat similar effect to the
Normalize command, except that
it works on each color channel of the layer individually. This usually
leads to color shifts in the image, so it may not produce the desired
result. “Stretch Contrast” works on layers of RGB,
Grayscale and Indexed images. Use “Stretch Contrast” only
if you want to remove an undesirable color tint from an image which
should contain pure white and pure black.
This command is also similar to the
command, but it does not reject any of the very dark or very bright
pixels, so the white might be impure.
Activate the Command
“Stretch Contrast” Example
Image after the command