Apply a 3x3 convolution matrix, using coefficient and offset in PHP
Description
The following code shows how to apply a 3x3 convolution matrix, using coefficient and offset.
Example
<?php//ww w .ja v a2 s. co m
$image = imagecreatefromgif('http://www.php.net/images/php.gif');
$emboss = array(array(2, 0, 0), array(0, -1, 0), array(0, 0, -1));
imageconvolution($image, $emboss, 1, 127);
header('Content-Type: image/png');
imagepng($image, null, 9);
?>
The code above generates the following result.
