PHP | Imagick getImageChannelDistortion() Function Last Updated : 19 Nov, 2019 Comments Improve Suggest changes Like Article Like Report The Imagick::getImageChannelDistortion() function is an inbuilt function in PHP which is used to compare image channels of an image to a reconstructed image and returns the specified distortion metric. Syntax: float Imagick::getImageChannelDistortion( Imagick $reference, int $channel, int $metric ) Parameters: This function accept three parameters as mentioned above and described below: reference: It specifies the Imagick object to compare with. channel: It specifies the channel constant that is valid for your channel mode. To apply more than one channel, combine channeltype constants using bitwise operators. metric: It specifies one of the metric type constants. List of METRIC constants are given below: imagick::METRIC_UNDEFINED (integer) imagick::METRIC_MEANABSOLUTEERROR (integer) imagick::METRIC_MEANSQUAREERROR (integer) imagick::METRIC_PEAKABSOLUTEERROR (integer) imagick::METRIC_PEAKSIGNALTONOISERATIO (integer) imagick::METRIC_ROOTMEANSQUAREDERROR (integer) Exceptions: This function throws ImagickException on error. Return Value: This function returns TRUE on success. Below programs illustrate the Imagick::getImageChannelDistortion() function in PHP: Program 1: php <?php // Create two new imagick object $imagick1 = new Imagick( 'https://media.geeksforgeeks.org/wp-content/uploads/20190823154611/geeksforgeeks24.png'); $imagick2 = new Imagick( 'https://media.geeksforgeeks.org/wp-content/uploads/20191112223241/trans9.png'); // Get the distortion with METRIC constant as imagick::METRIC_MEANABSOLUTEERROR $distortion = $imagick1->getImageChannelDistortion($imagick2, 0, 1); echo $distortion; ?> Output: 122728 Program 2: php <?php // Create two new imagick object $imagick1 = new Imagick( 'https://media.geeksforgeeks.org/wp-content/uploads/20190823154611/geeksforgeeks24.png'); $imagick2 = new Imagick( 'https://media.geeksforgeeks.org/wp-content/uploads/20190823154611/geeksforgeeks24.png'); // Get the distortion with METRIC constant // as imagick::METRIC_MEANABSOLUTEERROR $distortion = $imagick1->getImageChannelDistortion($imagick2, 0, 1); echo $distortion; ?> Output: 0 Note: In the second example output comes 0 because both of the image are same. Reference: https://www.php.net/manual/en/imagick.getimagechanneldistortion.php Comment More infoAdvertise with us Next Article PHP Syntax G gurrrung Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-Imagick Similar Reads PHP Tutorial PHP is a popular, open-source scripting language mainly used in web development. It runs on the server side and generates dynamic content that is displayed on a web application. PHP is easy to embed in HTML, and it allows developers to create interactive web pages and handle tasks like database mana 9 min read BasicsPHP SyntaxPHP, a powerful server-side scripting language used in web development. It’s simplicity and ease of use makes it an ideal choice for beginners and experienced developers. This article provides an overview of PHP syntax. 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