The Imagick::separateImageChannel() function is an inbuilt function in PHP which is used to separate a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.
Syntax:
bool Imagick::separateImageChannel( int $channel )
Parameters:This function accepts a single parameter $channel which holds the integer value corresponding to one of the CHANNEL constants.
Return Value: This function returns TRUE on success.
Exceptions: This function throws ImagickException on error.
Below programs illustrate the Imagick::separateImageChannel() function in PHP:
Program 1:
<?php // Create a new imagick object $imagick = new Imagick( // Separate the image channel $imagick->separateImageChannel(1); // Display the image header("Content-Type: image/png"); echo $imagick->getImageBlob(); ?> |
Output:
Program 2:
<?php // Create a new imagick object $imagick = new Imagick( // Apply selectiveBlurImage() function $imagick->separateImageChannel(imagick::CHANNEL_GREEN); // Display the image header("Content-Type: image/png"); echo $imagick->getImageBlob(); ?> |
Output:
Reference: https://www.php.net/manual/en/imagick.separateimagechannel.php
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