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이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
(PECL gmagick >= Unknown)
Gmagick::gammaimage — Gamma-corrects an image
$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.
gamma
The amount of gamma-correction.
The gamma corrected Gmagick object.
错误时抛出 GmagickException。