The Imagick class
PHP Manual

Imagick::evaluateImage

(PECL imagick 2.0.0)

Imagick::evaluateImageApplies an expression to an image

Descrição

bool Imagick::evaluateImage ( int $op , float $constant [, int $channel = Imagick::CHANNEL_ALL ] )
Aviso

Esta função não está documentada; somente a lista de argumentos está disponível.

Applys an arithmetic, relational, or logical expression to an image. Use these operators to lighten or darken an image, to increase or decrease contrast in an image, or to produce the "negative" of an image.

Parâmetros

op

The operator

constant

The value of the operator

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.

Valor Retornado

Retorna TRUE em sucesso.

Erros

Dispara ImagickException em erro.


The Imagick class
PHP Manual