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Values reported #4

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jossi opened this issue Oct 11, 2013 · 2 comments
Open

Values reported #4

jossi opened this issue Oct 11, 2013 · 2 comments

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@jossi
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jossi commented Oct 11, 2013

Using other tools such as Avisynth with the SIMM plugin we get different values

Car_ImageWarp.png / Car_source.png
SSIM: 0.9829

pyssim reports 0.987784

Using AviSynth coupled with a few plugins

AviSynth 2.5.8 from http://sourceforge.net/projects/avisynth2/files/AviSynth%202.5/AviSynth%202.5.8/Avisynth_258.exe/download
Latest ffms2 plugin from https://github.com/FFMS/ffms2/releases
SSIM plugin from http://forum.doom9.org/showthread.php?p=370323
@jterrace
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I wonder if that could be floating point error. pyssim is using 32-bit floats. Any idea if Avisynth is using 64-bit floats?

@jterrace
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Looks like they're using doubles. Can you post those two images here and I'll see if switching to numpy.float64 matches their values?

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@jterrace @jossi