On Fri, Aug 08, 2008, Anthony Thyssen wrote: > Of course, It would be better to implement BOTH, and then let the user > decide rather than just replacing one for another.
That seems like a very reasonable > The most important thing being that a remainer method of distribution be > used, so that any integer rounding is taken into account. Your patch > does not seem to take that into account. though that is also probably > easily fixed. Yes. I was wary of propagating 100% of the error because I did not know how the quantiser would react (I have seen ImageMagick choose weird colours when dealing with restrictive palettes). But after thinking more about it, I think it would do no harm. I'll update the patch. > Then again there is a variety of ways of distributing the error > than just the Floyd-Steinberg method. It was just the first, and in > many papers was not regarded as the best of this type. True (though I have shown in a recent paper that it was actually one of the best of this type). I have also collected and implemented a lot of different error diffusion methods for testing purposes, you may have a look at them here: <http://libcaca.zoy.org/study/part3.html>. If you believe one of them might be interesting for ImageMagick, let me know, I should be able to provide reasonable patches for most of them. Regards, -- Sam. _______________________________________________ Magick-developers mailing list Magick-developers@imagemagick.org http://studio.imagemagick.org/mailman/listinfo/magick-developers
