[Ffmpeg-devel] [PATCH] DV image quality improvement (original) (raw)

Rich Felker dalias
Mon Feb 27 18:05:00 CET 2006

On Sat, Feb 25, 2006 at 11:26:35PM +0100, Christian Iversen wrote:

Having read the paper on the Universal Image Quality Index (did I get that name wrong?), I've seen examples where images there were very clearly completely different in quality got the exact same PSNR rating. I think it's

Yes, I'm quite aware of it. However, if you perform those same tests, but for each test hold the type of distortion fixed and just vary the amount of it, PSNR will correlate rather well with the visual quality. Where PSNR particularly sucks is for comparing different types of distortion.

Rich

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