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Imagick::evaluateImage()

Imagick::evaluateImage - Applies an expression to an image

Syntax

bool Imagick::evaluateImage (int $op, float $constant, int $channel)

Arguments

  • 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.

Description

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.

Version

PHP PECL imagick 2.0.0

Return value

Returns TRUE on success.