Gmagick
PHP Manual

Gmagick::gammaimage

Gamma-corrects an image

Description

public Gmagick Gmagick::gammaimage ( float $gamma )

Gamma-corrects an image. The same image viewed on different devices will have perceptual differences in the way the image's intensities are represented on the screen. Specify individual gamma levels for the red, green, and blue channels, or adjust all three with the gamma parameter. Values typically range from 0.8 to 2.3.

Parameters

gamma

The amount of gamma-correction.

Return Values

The gamma corrected Gmagick object.

Errors/Exceptions

Throws an GmagickException on error.