imageconvolution

PHP 5 >= 5.1.0, PHP 7, PHP 8
imageconvolution - Apply a 3x3 convolution matrix, using coefficient and offset
Manual
Code Examples

Example #1 Embossing the PHP.net logo

<?php
$image = imagecreatefromgif('http://www.php.net/images/php.gif');
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PHP Version:

Example #2 Gaussian blur

<?php
$image = imagecreatetruecolor(180,40);
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PHP Version:


Function imageconvolution:

Image Processing and GD Functions

Most used PHP functions