Imagick::evaluateImage

(No version information available, might be only in CVS)

Imagick::evaluateImage — Applies an expression to an image

Description

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

Avertissement

Cette fonction n'est pas documentée et seule la liste des arguments est disponible.

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.

Liste de paramètres

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.

Valeurs de retour

Returns TRUE on success.

Erreurs / Exceptions

Throws ImagickException on error.