Hi.
As many fuji users know, the HDR function of x-t4 and x-t5 cameras, produces an internal rendition of the scene by merging 3 shots in a single HDR image and it works quite well if I may.
I never used this mode until recently just to try it and I noticed (I have an x-t5), that it produces a single raw file about 2.5 times the size of a normal raw, plus the final JPG.
I was hoping to get all the 3 single raws used internally by the camera to compute the final HDR JPG, as I would do manually, but you get this massive file instead.
Then I learned that darktable CAN open this massive raw file but it reads only one of the image that it contains (the middle exposure one I think).
It would be great if DT could recognize this kind of āspecialā raw file and give you a way to edit the single shots one by one and/or compute the final HDR from them within darktable with its own hdr engine.
I read somewhere that some guy found a way to manually identify and separate the single images inside the big raw file due to some markers inside the file itself (and it seems plausible to me), so it could/should also be possible to automate that in theory.
How can I submit this feature request to the DT team?
Iām not a developer at all, but I can provide some test shots from my camera.
PS: excuse me for my English, Iām italian and I donāt use english very often.
There have been similar requests made before, e.g. related to Pentax multi-shot raw files as well:
Unfortunately, no developer has yet stepped up to completely solve this workflow from rawspeed to darktable in a generic and consistent fashion, soā¦ PRs are always welcome
I donāt own a Fuji camera but a online search suggests you may have to use FUJIFILM X RAW STUDIO to process these files. BTW, in my experience in DT the ability to process a single exposure RAW that has captured the highlight details well negates the need and possibly the advantage of HDR processing. HDR processing was very important in the early days when we usually shot jpg images rather than raw. It would be worth comparing the results you can obtain from DT with your RAW file against the cameraās HDR produced JPG. Maybe you might like to provide an example of the cameras JPG and provide the raw file in the PlayRaw category of this forum to see what can be done.
This depends of the actual camera/sensor used. HDR bracketing can help eek out a bit more DR when using smaller formats like APS-C and M43, and make the image more comparable to FF for example in terms of editing latitude and quality. Whatās even more neat is that some cameras, instead of bracketing in e.g. exposure time (separate readouts/files, possible misalignment), do in-sensor merging of signals w/ different gains and produce a single raw image w/ increased DR (which is not just about highlights).
In any case, please free to open a feature request on github and make sure to provide a link to a sample HDR file, you never know when someone might start poking at itā¦
