CakeFest 2017 NYC, the Official CakePHP Conference


(PECL imagick 2.0.0)

Imagick::compareImageChannelsReturns the difference in one or more images


array Imagick::compareImageChannels ( Imagick $image , int $channelType , int $metricType )

Compares one or more images and returns the difference image.

Elenco dei parametri


Imagick object containing the image to compare.


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.


One of the metric type constants.

Valori restituiti

Array consisting of new_wand and distortion.


Lancia una ImagickException in caso di errore.

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