note 45523 added to function.imagejpeg

I'm trying to find a function in Php that compares Jpg's files, I don't find it. What I need, is a way to know if a camera moved... Also, I need to be able to set sensibility. If you have any idea or sugestion. Let me know Thanks Dave ---- Manual Page -- http://www.php.net/manual/en/function.imagejpeg.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+45523 Delete -- http://master.php.net/manage/user-notes.php?action=delete+45523&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+45523&report=yes Search -- http://master.php.net/manage/user-notes.php