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Bug #34980 imageconvolution ignoring div and offset
Submitted: 2005-10-25 20:47 UTC Modified: 2005-10-26 01:01 UTC
From: jaanus at underwerks dot com Assigned: pajoye (profile)
Status: Closed Package: GD related
PHP Version: 5.1.0RC3 OS: Linux 2.6.13
Private report: No CVE-ID: None
 [2005-10-25 20:47 UTC] jaanus at underwerks dot com
Description:
------------
imageconvolution ignores the values supplied for div and offset. Basically it works as if div=1 and offset=0.

The formula for the conversion has been chacked in photoshop, and should work as intended.

Reproduce code:
---------------
<?PHP
$img=imagecreatefromjpeg("image.jpg");
imageconvolution($img,array(array(-1,-1,-1),array(-1,16,-1),array(-1,-1,-1)), 8,0);
imagejpeg($img,"test.jpg");
?>

Expected result:
----------------
Sharpened image that retains normal color etc.

Actual result:
--------------
Eccsessivly sharpened image, mostly white with some color in the high-contrast areas.

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2005-10-25 20:54 UTC] tony2001@php.net
Assigned to the maintainer.
 [2005-10-26 01:01 UTC] pajoye@php.net
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.

Thanks for the notice :)

Fixed in 5.1-cvs, you can test it again with the next snapshots.
 
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