Imagick::gammaImage

(PECL imagick 2.0.0)

Imagick::gammaImage — Gamma-corrects an image

Descripción

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

Warning

Esta función no está documentada actualmente, solamente se encuentra disponible la lista de parámetros.

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.

Lista de parámetros

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.

Valores retornados

Returns TRUE on success.

Errors/Exceptions

Throws ImagickException on error.