Imagick::compareImageChannels

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

Imagick::compareImageChannels — Returns the difference in one or more images

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

Warning

This function is currently not documented; only its argument list is available.

Compares one or more images and returns the difference image.

image: Imagick object containing the image to compare.
channelType: 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.
metricType: One of the metric type constants.

Returns TRUE on success.

Throws ImagickException on error.