https://bugs.kde.org/show_bug.cgi?id=444442
--- Comment #3 from Lukas Jirkovsky <l.jirkov...@gmail.com> --- I'm not saying RawTherapee is not doing some funky business – I don't have good enough understanding of the format. However looking at the embedded raw data using rawpy I see that there are some usable data which are missing in DNG. The only explanation I can think of (with my zero knowledge of the format) is that these data are outside of region of interest defined in EXIF so digiKam throws them away assuming they are not usable. That's what I'm seeing with the Canon CR2 – with CR2 a different crop is present but the cropped area is empty, ie. no Bayer filter. So no data lost. To show the difference – this is how the raw data extracted from ARW look like: https://drive.google.com/file/d/1fivJ0q8Lc-ZDZbZLkRUKmg5lrJ0ljOyh/view?usp=sharing And this is how the raw data from DNG look like: https://drive.google.com/file/d/1rHQ6GQ5dls1xmIV8ZfCqIPC8Ks0aOrQj/view?usp=sharing I just bumped the exposure on both files so that they are not pitch black, no other changes. If you examine the right border you will see that there are more usable data in the ARW file. It seems a shame to throw useful data away. If my theory of these data being outside of the crop defined in EXIF, maybe digiKam could have an option to preserve these data? -- You are receiving this mail because: You are watching all bug changes.
