note 47235 deleted from ref.image by tularis
| From: | tularis@php.net | Date: | Sun, 29 Jun 2008 21:10:50 +0000 |
| Subject: | note 47235 deleted from ref.image by tularis | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-140966@lists.php.net to get a copy of this message | ||
Note Submitter: Lost at LostLord dot com [Morteza Zafari]
----
A simple image compare function.
It scans 2 images pixel by pixel, from left to right and from top to bottom, if all pixels have
equal colors it will return 'True', otherwise it will return 'False'.
$img1 and $img2 must be of type image. (see usage)
----------------------------------------------
function imagecompare($img1, $img2) {
if (imagesx($img1)!=imagesx($img2) || imagesy($img1)!=imagesy($img2)){
return false;
}
for( $x=0; $x<imagesx($img1 ); $x++ ){
for ($y=0; $y<imagesy($img1); $y++) {
if(imagecolorat($img1,$x,$y)!=imagecolorat($img2,$x,$y)){
return false;
}
}
}
return true;
}
----------------------------------------------
Sample usage:
$im1=imagecreatefromgif("test1.gif");
$im2=imagecreatefromgif("test2.gif");
echo imagecompare(&$im1,&$im2);