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A comment on DwarFS: A fast high compression read-only file system. Parent comment

Re:DwarFS: A fast high compression read-only file system by jandrese on Sunday November 29, 2020 @08:45PM (#25249959)
The RAWs aren't compressible? Are they LZ encoded on the camera?
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Re:DwarFS: A fast high compression read-only file system by kortex on Sunday November 29, 2020 @09:50PM (#25250300)
RAW imagery I have worked with is about 25-50% losslessly compressible on average. Most of your gains in image compression are from quantizing the gamut in clever, (usually) imperceptible ways.

Raw imagery contains a lot of entropy that usually doesn't affect the appearance perceptually, but still has sig figs that frustrate compression.

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Re:DwarFS: A fast high compression read-only file system by spaetzleesser on Sunday November 29, 2020 @10:56PM (#25250586)
My Fuji has lossless RAW compression and as far as I know quite a few others too.
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Re:DwarFS: A fast high compression read-only file system by bufferoverflow on Sunday November 29, 2020 @10:43PM (#25250515)
I just tried compressing one with 7-zip ultra level compression. Saved maybe 5%. Wouldn't get even that with realtime compression.
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