The Imagick class
PHP Manual

Imagick::gammaImage

(PECL imagick 2.0.0)

Imagick::gammaImageGamma-corrects an image

Описание

bool Imagick::gammaImage ( float $gamma [, int $channel = Imagick::CHANNEL_ALL ] )
Предупреждение

Към момента тази функция не е документирана; наличен е единствено списъкът с аргументите й.

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.

Параметри

gamma

The amount of gamma-correction.

channel

Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Defaults to Imagick::CHANNEL_ALL. Refer to this list of channel constants.

Връщани стойности

Връща TRUE при успех.

Грешки/Изключения

Хвърля ImagickException при грешка.


The Imagick class
PHP Manual