There's new function in PHP 5 CVS, imagefilter(),
I'd guess this would be good addition into that one..
--Jani
On Mon, 24 Nov 2003, Paul Troughton wrote:
>Hello,
>
>I was surprised to find that, although the GD image-handling functions
>shipped with PHP do many useful things very well, there's no function
>to sharpen an image. I found a few posts bemoaning this absence, and
>therefore attach a patch which adds the function
>
> int imagesharpen ( resource im, int pct )
>
>It performs the sharpening in-place. pct is the degree of sharpening to
>be applied: 0 does nothing; 100 gives a quite noticeable effect. Values
> >100 can be used for stronger sharpening. Negative values are treated
>as 0.
>
>The routine only sharpens truecolor images, as it rarely makes sense to
>attempt the operation on palletted images.
>
>It's a simple linear sharpening routine using a 3x3 kernel, rather than
>the more flexible, but slower, unsharp masking approach used in e.g.
>Photoshop, Imagemagick. However it's very effective at making resampled
>photographic images (such as thumbnails) look a little more crisp.
>
>I've built and tested it using gcc 3.3 under Mac OS X 10.3.1. There's
>nothing I'd expect to be platform-dependent in it. The attached patch
>is against php4-STABLE-200311202030, but it should work with most
>varieties of php-4.3.4, as the new code is fairly self-contained.
>
>This is my first patch for PHP. Is there anything else I should do,
>beyond posting it here?
>
>Many thanks,
>
>
>Paul.
>
>
--
PHP Internals - PHP Runtime Development Mailing List
To unsubscribe, visit: http://www.php.net/unsub.php
