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 ] )
Внимание

К настоящему времени эта функция еще не была документирована; для ознакомления доступен только список аргументов.

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.

Список параметров

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. Refer to this list of channel constants.

Возвращаемые значения

В случае успешной работы возвращает TRUE.

Ошибки

Бросает ImagickException при ошибке.


The Imagick class
PHP Manual