deep file depth compression
Larry Gritz <[email protected]>
| Newsgroups | gmane.comp.video.openexr.devel |
|---|---|
| Message-ID | <[email protected]> |
This isn't a question about the OpenEXR file format or library per se, but since it's the main way everybody is storing deep images... If you're generating deep images out of a render, and you're starting with large numbers of samples per pixel, a "raw" deep image can be unnecessarily huge. I'm assuming that it's common practice to "compress" them somehow by decimating/combining the samples in each pixel. I've tried combining samples that were closer than a certain threshold in depth, as well as dropping samples that are below some opacity threshold (combining their slight opacity with the next one, say). But I'm still not fully satisfied with this, haven't hit on threshold values that give an accuracy vs file size tradeoff that I'm aiming for. Is anybody inclined to comment on what sample decimation strategies they have found to work well? -- Larry Gritz [email protected]