changing the brightness of an images

Hi, I hope this is the right newsgroup for this so if it is not, please, excuse me. I would like to be able to change the brightness of an image using PHP. Here are some more detiails: I would like to load a jpeg file from a webpage, change the brightness of the image, and save it back to a file. I am pretty sure how to load and save the file but I can not figure out how to change the brightness. I am using PHP 4.1.2. Thanx -- Mitko -- --------------------------------------------------- To reply remove all CAPS letters from email address --------------------------------------------------- The little town that time forgot, Where all the women are strong, The men are good-looking, And the children above-average. -- Prairie Home Companion