Imagick::gammaImage

(PECL imagick 2.0.0)

Imagick::gammaImage — Gamma-corrects an image

설명

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

Warning

이 함수는 현재 문서화 되어있지 않습니다; 인수 목록만을 제공합니다.

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.

인수

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.

반환값

성공시에 TRUE를 반환합니다.

오류/예외

오류시에 ImagickException이 발생합니다.