Snippets
Grayscale image ( Anthony 23/6/2008 )
Use a filter to change an image to grayscale. There are other filters check the link below. Note: needs php 5.
GD code:
<?php
$image = imagecreatefromjpeg( "input.jpg" );
imagefilter( $image, IMG_FILTER_GRAYSCALE, $args );
imagejpeg( $image, 'output.jpg' );
imagedestroy( $image );
?>