note 87965 added to function.imageconvolution

Here is something that you will find extremely handy while beta testing your convolution filters. It's very time consuming to have something like: $aFilter = array( array(-1, 2, -1), array(2, 4, 2), array(-1, 2, -1) ); Because every time you're making a change you have to jump around a lot, and are forced to be careful with your edits to avoid destroying the array format (such as accidentally deleting a parenthesis or comma). That's not fun at all and very counter productive. Wouldn't it be good if you could just type the matrix out in text form and separate the entries with either spaces or tabs or newlines? Ie any of the following: -1 2 -1 2 4 2 -1 2 -1 or -1 2 -1 2 4 2 -1 2 -1 Well, now you can! I'd like to emphasis that you should only use this function for development purposes, while trying out different convolution matrices! And without further ado: <?php function convFilter($saFilter) { $aParts = preg_split('/\s+/s', $saFilter, -1, PREG_SPLIT_NO_EMPTY); if (count($aParts) != 9) { return false; } $aMatrix = array_chunk($aParts, 3); return $aMatrix; } // Usage: $aFilter = convFilter(" 1.0 2.0 1.0 2.0 4.0 2.0 1.0 2.0 1.0 "); imageconvolution($rImg, $aFilter, 16, 0); ?> Enjoy! You can now type your matrices out in any way you want (even floats), as long as any form of whitespace separates the various numbers. Once you are done testing, just type the matrix out as a normal array to save on processing time. And please post your convolution filters if you come up with some useful ones so they can be implemented by others. ;-) ---- Server IP: 80.67.2.2 Probable Submitter: 217.73.106.170 ---- Manual Page -- http://www.php.net/manual/en/function.imageconvolution.php Edit -- https://master.php.net/note/edit/87965 Del: integrated -- https://master.php.net/note/delete/87965/integrated Del: useless -- https://master.php.net/note/delete/87965/useless Del: bad code -- https://master.php.net/note/delete/87965/bad+code Del: spam -- https://master.php.net/note/delete/87965/spam Del: non-english -- https://master.php.net/note/delete/87965/non-english Del: in docs -- https://master.php.net/note/delete/87965/in+docs Del: other reasons-- https://master.php.net/note/delete/87965 Reject -- https://master.php.net/note/reject/87965 Search -- https://master.php.net/manage/user-notes.php