Imagick::equalizeImage
Imagick::flattenImages
The Imagick class
PHP Manual

# Imagick::evaluateImage

(PECL imagick 2.0.0)

Imagick::evaluateImage — Applies 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. Defaults to `Imagick::CHANNEL_ALL`. Refer to this list of channel constants.

### Valor Retornado

Retorna `TRUE` em sucesso.

### Erros

Dispara ImagickException em erro.

Imagick::equalizeImage
Imagick::flattenImages
The Imagick class
PHP Manual