[FFmpeg-devel] donation for snow

[Jason Garrett-Glaser]

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 ...
>
> http://wftp3.itu.int/av-arch/jvt-site/2007_04_SanJose/JVT-W110.zip
>
> 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:

http://forum.doom9.org/showpost.php?p=1214866&postcount=12

The results are embarrassing.

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