Re: DWA compression
Brendan Bolles <[email protected]>
| Newsgroups | gmane.comp.video.openexr.devel |
|---|---|
| Message-ID | <[email protected]> |
On Aug 16, 2014, at 11:35 PM, Sean Y Chen wrote: > In Brendan Bolles's demo video, it seems that 100000 is the limit for a couple of the images, though one of them goes to 250000 before reaching file size 1. Here's the code for the little program I wrote to generate those sequences. I'm basically doing compression = pow(10.0, frame / 25.0), with frames going from 0-149. I wouldn't say it's perceptually linear exactly, although if you look at the MtTamWest example where I show difference mode, the diff seems to come in pretty linearly. Karl's has a nice write-up on the algorithm at the top of ImfDwaCompressor.cpp. Brendan _______________________________________________ Openexr-devel mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/openexr-devel
main.cpp
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