Imagick::getImageChannelDistortions

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Gets channel distortions

float Imagick::getImageChannelDistortions ( Imagick $reference, int $metric [, int $channel = Imagick::CHANNEL_DEFAULT ] )

Compares one or more image channels of an image to a reconstructed image and returns the specified distortion metrics This method is available if Imagick has been compiled against ImageMagick version 6.4.4 or newer.

Parameters:

reference

Imagick object containing the reference image

metric

Refer to this list of metric type constants.

channel

Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. Defaults to Imagick::CHANNEL_DEFAULT. Refer to this list of channel constants

Returns:

Returns a double describing the channel distortion.

Exception:

Throws ImagickException on error.

Links:

http://php.net/manual/en/imagick.getimagechanneldistortions.php

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2016-02-24 16:00:59

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