array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'en', ), 'this' => array ( 0 => 'imagick.getimagechanneldistortions.php', 1 => 'Imagick::getImageChannelDistortions', 2 => 'Gets channel distortions', ), 'up' => array ( 0 => 'class.imagick.php', 1 => 'Imagick', ), 'prev' => array ( 0 => 'imagick.getimagechanneldistortion.php', 1 => 'Imagick::getImageChannelDistortion', ), 'next' => array ( 0 => 'imagick.getimagechannelextrema.php', 1 => 'Imagick::getImageChannelExtrema', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/imagick/imagick/getimagechanneldistortions.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

Imagick::getImageChannelDistortions

(PECL imagick 2 >= 2.3.0, PECL imagick 3)

Imagick::getImageChannelDistortions — Gets channel distortions

Description

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

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

Return Values

Returns a float describing the channel distortion.

Errors/Exceptions

Throws ImagickException on error.