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87/365 (or: could someone please fix Sigma Foveon DNG handling in darktable?)
Yesterday I decided to take my criminally neglected Sigma SD Quattro for a spin again. The camera and its #Foveon sensor may have their share of quirks, but the results still blow me away completely. There is really nothing comparable out there, and I sincerely hope that Sigma finds a way to resurrect the technology. Unfortunately the moment I picked it up I remembered that #darktable has an annoying bug which makes handling Sigma DNG files a somewhat frustrating and needlessly […]Could it be a workaround to throw AdobeDNG converter at them? I'm not sure if converts from DNG to DNG though.
My GH6 produces RW2 RAW that cannot be read by almost anything but Adobe products.
The Windows application recommended by Panasonic is “SILKYPIX Developer Studio” and it is bad. Very bad.
I don't understand why these camera manufacturers don't contribute to dcraw or libraw.
@nielso@digitalcourage.social I’m not sure if that can work; Sigma’s DNGs are linear DNGs (because Foveon sensors have no bayer matrix; they derive colours through the different depths in which colour wavelengths penetrate the silicon).
I’ll give it a try though. But really the simplest solution would be to fix #darktable. The source of the problem is kind of obvious. If I didn’t already have three different lifes at the same time, I’d tackle it myself, but I can’t possibly make time for yet another project.
The problem with Japanese companies is patents upon patents upon patents. I know because I worked for one. It’s hell on earth. They patent just about anything, so it’s a complicated and tangled mess to make something open source or even contribute to open source.
(Fun fact: I once had to take out a function of a program which reads the preview JPEG that’s embedded in RAW data and displays it in a grid view. Because someone has a patent for reading the preview JPEG that’s embedded in RAW data in order to display it to the user in a grid view. That’s the extent of how bad it is. It’s a wonder that nobody has patented breathing in Japan yet)
I’m sure there are people at Sigma who would be very much in favor of contributing to dcraw or libraw, but it’s most certainly not possible because 12 different parties have some kind of stake in the way the technology works.
Ah, sad story. But interesting sensor concept by Sigma/Foveon.
Another such story is raw video data, which is basically blocked by the American company RED holding a patent on compressing raw video data that has not been debayered. The compression algorithms they use are standard, they developed none of them. So the invention in their patent is: „take sensor readout, throw standard compression at it.” Video pixel peepers go crazy at them in regular intervals.
Apple tried to sue RED for this BS, but were not successful .
I also should be more involved in open source contributions. Can't do the programming, but I should interact more with my Pipewire bug reports, creating the information they say they need… but I just don't find the time and energy, even though I'd like to.
Having spent around 70 hrs on editing/mixing an album lately, I can't imagine to interweave this process with chasing bugs in audio device support. I'd just go (even more) nuts with it.