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PHP | Imagick convolveImage() Function

  • Difficulty Level : Easy
  • Last Updated : 24 Apr, 2020
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The Imagick::convolveImage() function is an inbuilt function in PHP which is used to apply a custom convolution kernel to the image.


bool Imagick::convolveImage( $kernel, $channel )

Parameter: This function accepts two parameters as mentioned above and described below:

  • $kernel: This parameter stores the value of the convolution kernel as an array.
  • $channel: This parameter stores the value of the channel. The value of default channel is Imagick::CHANNEL_DEFAULT.

Return Value: This function returns True on success.

Original Image:

Below program illustrates the Imagick::convolveImage() function in PHP:


// require_once('path/vendor/autoload.php');
/*Imagick Object*/
$image = new Imagick(
$Matrix = [-1, -1, -1, -1, 8, -1, -1, -1, -1, ];
$image->setImageBias(1 * \Imagick::getQuantum());
/*Image Header*/
header('Content-type: image/png');
// Display output image
echo $image;



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