This post is a demo of what the imagefilter() PHP function can do for you. http://www.phpied.com/image-fun-with-php-part-2/
Description bool imagefilter ( resource $image , int $filtertype [, int $arg1 [, int $arg2 [, int $arg3 [, int $arg4 ]]]] ) imagefilter() applies the given filter filtertype on the image.
phpThumb() uses the GD library to create thumbnails from images (JPEG, PNG, GIF, BMP, etc) on the fly. The output size is configurable (can be larger or smaller than the source), and the source may be the entire image or only a portion of the original image. True color and resampling is used if GD …