PHP Imagick getImageChannelExtrema () Function

PHP

Syntax:
array Imagick::getImageChannelExtrema (int $channel)
Parameters:This function takes one parameter, $channel,which specifies a channel constant valid for your channel mode. Use the bitwise operator to concatenate the channel type constants.Exceptions:This function will throw an ImagickException on error.Return Value:this the function returns TRUE on success.The following programs illustrate the Imagick::getImageChannelExtrema() functionin PHP:Program 1:   // Create a new imagick object $imagick = new Imagick ( ' https://media.engineerforengineer.org/wp-content/uploads / engineer forengineer-13.png ' );  
// Get extrema with CHANNEL constant equal to 0
// which corresponds to imagick::CHANNEL_UNDEFINED $extrema = $imagick -> getImageChannelExtrema (0); print_r ( $extrema ); ?>
Output:
Array ([minima] = > 0 [maxima] = > -9223372036854775808)
Program 2:  
// Create new imagick object $imagick = new Imagick ( ' https://media.engineerforengineer.org/wp-content/uploads/20190918234528/colorize1.png ' );  
// Get extremum with CHANNEL constant as 6
// which corresponds to imagick::CHANNEL_BLUE $extrema = $imagick -> getImageChannelExtrema (6); print_r ( $extrema ); ?>
Output:
Array ([minima] = > 5654 [maxima] = > 65535)
Link:https://www.php.net/manual/en/imagick.getimagechannelextrema.php



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