The Imagick::convolveImage() function is an inbuilt function in PHP which is used to apply a custom convolution kernel to the image.
Syntax:
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.
- $channel: This parameter stores the value of the channel. The value of default channel is Imagick::CHANNEL_DEFAULT.
Return Value: This function returns True on success.
Original Image:
Below program illustrates the Imagick::convolveImage() function in PHP:
Program:
<?php   // require_once('path/vendor/autoload.php');   /*Imagick Object*/$image = new Imagick(   $Matrix = [-1, -1, -1, -1, 8, -1, -1, -1, -1, ]; $image->setImageBias(1 * \Imagick::getQuantum());   /*convolveImage*/$image->convolveImage($Matrix);   /*Image Header*/header('Content-type: image/png');   // Display output image echo $image; ?> |
Output:
Reference: http://php.net/manual/en/imagick.convolveimage.php
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