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RD-OPT enhancement #629
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Referring to my own comments under mozilla/mozjpeg#182, whether or not such an enhancement could be considered for libjpeg-turbo would depend on several things:
Generally speaking, corporate funding for libjpeg-turbo happens at much lower levels than the CEO, because such funding will generally come out of an organization's R&D budget. CEOs of big corporations generally won't be involved with software development on a deep enough technical level to understand the pros and cons of specific JPEG features. The best I can do right now is flag this issue with "funding needed" and "help wanted" and hope that other parties will step forward to lay the groundwork, as described above. Once a patch exists, then I can review it and get an idea of whether it's something that can be integrated and, if so, how much time it would take. |
RDOPT is no longer state of the art; I'll plug OptD-HDQ as well from the other thread, which outperforms RDOPT at a fraction of the complexity. See "Quantization Table Design Revisited for |
Can someone please summarize the tradeoffs? The libjpeg-turbo General Fund for this year is exhausted, so I don't have time to dig into any pure research. I was interested in RD-OPT mainly because there might have been preexisting code I could use. |
I compared rdopt source files from this archive and maked into one. This will be useful for reverse engineering the code. @zvezdochiot did git for version 2.0, I also compared files from version 3.0. I compared the dates of creation, the size of the files, further the content with the WinMerge. |
I know it's a hard job, could you implement the RD-OPT algorithm in jpeg-turbo?
Would any company be able to pay for your work on this?
What amount would you price implementing this feature at?
A request for you guys to write to ceo's of companies that use jpeg-turbo to support the idea with donations etc.
Last year, I found the source code and papers in .pdf regarding RD-OPT and QCLIC at: https://lost-contact.mit.edu/afs/cs.wisc.edu/p/qclic/. It looks like the site is taken down for good. I attach copies of the files and the most important pdfs in the links below.
Overview of RD-OPT
Source code
List of papers concerning RD-OPT/QCLIC
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