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WyohKnott / image-formats-comparison

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Lossless Comparison Discrepancy #2

Closed Caspy7 closed 7 years ago

Caspy7 commented 7 years ago

Sorry for filing an issue, but I'm not sure how else to contact you. I was looking at the information here: https://wyohknott.github.io/image-formats-comparison/report.html And see that Daala, AV1, JPEG XR and JPEG 2000 all appear to beat FLIF for compression on lossless images. This surprised me a bit because FLIF had been rated best for lossless compression in the ICIP 2016 Grand challenge. http://people.xiph.org/~unlord/ICIP2016/icip2016grandchallenge.pdf (page 35) That comparison included JPEG XR and JPEG 2000.

I believe I had also seen claims (with numbers) about FLIF beating other codecs for lossless image compression. I have no horse in this game or vested interest, I was just wondering if you have any idea why there is such a difference in the results?

Caspy7 commented 7 years ago

Apologies, I misread the chart. This is no longer unclear. I was wrong about the JPEG codecs.