[FFmpeg-devel] donation for snow
malc at pulsesoft.com
Thu Nov 20 00:47:18 CET 2008
"Jason Garrett-Glaser" <darkshikari at gmail.com> writes:
> 2008/11/6 Michael Niedermayer <michaelni at gmx.at>:
>> On Thu, Nov 06, 2008 at 04:39:45PM -0800, Baptiste Coudurier wrote:
>>> Jason Garrett-Glaser wrote:
>>> >> Do you have any comparision data ? I would, too, be interested in having
>>> >> these comparisions, also knowing which jp2k encoder was used, test
>>> >> material, etc...
>>> > I remember being linked to a paper on the topic a while back which had
>>> > the numbers I was using (though I don't remember them exactly).
>>> > However, I don't trust PSNR anyways, and if you wanted to do a real
>>> > comparison, I would say that a visual test would be the only one worth
>>> > bothering with.
>>> I understand, what puzzles me is that D-Cinema guys, who are know to be
>>> really picky about picture quality (choosing 12 bit XYZ is a thing),
>>> chose jp2k over other codecs, having done many extensive visual tests
>>> (they don't trust PSNR, Im not sure they care about it).
>> heres a comparission, i hope ill find more. The one i meant was older,
>> ill try to find some more latr ...
>> a brief look found in the pdf (the xls are just crashing my openoffice)
>> Results ? SVC against JPEG2000
>> Similar PSNR for 1088p25
>> Visual comparisons to be performed for each resolution
>> Based on this and that wavelet artifacts look more pleasing than
>> blocking artifacts i suspect but may be wrong that j2k beats h264 SVC for
>> intra coding.
> I know its been a while, but I just did a small JPEG-2K vs JPG vs x264
> comparison for unrelated reasons, so I figured I'd post it. It can be
> found here:
> The results are embarrassing.
> Dark Shikari
And some more material:
mailto:av1474 at comtv.ru
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