PHP


<?php
       header('Content-type: image/jpeg');
       $i = imagecreatefromjpeg('carl.jpg');
       imagefilter($i, IMG_FILTER_NEGATE);
       imagejpeg($i);
?>

Original

IMG_FILTER_NEGATE

IMG_FILTER_GRAYSCALE

IMG_FILTER_BRIGHTNESS

IMG_FILTER_CONTRAST

IMG_FILTER_COLORIZE

IMG_FILTER_EDGEDETECT

IMG_FILTER_EMBOSS

IMG_FILTER_GRAYSCALE + IMG_FILTER_EMBOSS

IMG_FILTER_GAUSSIAN_BLUR

IMG_FILTER_SELECTIVE_BLUR

IMG_FILTER_MEAN_REMOVAL

IMG_FILTER_SMOOTH