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

# Imagick::evaluateImage

(PECL imagick 2.0.0)

Imagick::evaluateImage — Applies an expression to an image

### Descripción

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

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

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.

### Lista de parámetros

`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.

### Valores retornados

Returns `TRUE` on success.

### Errors/Exceptions

Throws ImagickException on error.

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