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PHP GD image convolution

This example shows how to convolution an image in php gd.


$image = imagecreatefromjpeg('images.jpg');

$emboss = array(array(2, 0, 0), array(0, -1, 0), array(0, 0, -1));

imageconvolution($image, $emboss, 1, 127);

header('Content-Type: image/jpeg');

imagejpeg($image, null, 9);


After running the program you will get the following output



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