(the bug in itself is a long story, tl;dr: The white balance setting is wrong, and unfortunately this can’t be mitigated using a preset due to a peculiarity of the white balance module)
The script provides a single “Fix Foveon DNG” button which corrects the white balance setting of the chosen image in a way that Sigma Foveon DNGs are displayed correctly.
This part functions just fine. But of course what I’d really like is a function that corrects a batch of just imported DNGs so that I don’t have to do it manually.
And here’s the problem. As I understand it, I would have to switch to the darkroom view to remote control the white balance module from my lua script.
Open an image and turn off color calibration and set white balance to as shot. Save it as a style, then you could apply it after import using a while loop. Or, just select all the images and apply the style from the styles module.
Different option.
How about we set the script to make the change when the image is loaded into darkroom? When the images are imported the thumbnails are pulled from the images to populate the lighttable. It’s when you go to process the image that you need the fix. So, you could catch the darkroom-image-loaded event and then check if color calibration is enabled. If it is, apply your fix. If it’s not, then you’ve probably already applied your fix. Or, you could attach a tag darktable|Foveon Fix Applied when you fix it, then just add a check for the tag. This way it acts like an auto apply preset.
dt.register_event("fix_sigma_foveon_dngs", "darkroom-image-loaded",
function(event, clean, image)
if clean then
fix_image(image)
end
end
)
Alas, no. When choosing “As Shot” in the White Balance modules, not the fact that “as shot is selected” gets saved in the preset (or style), but the actual white balance value. That’s kind of the whole problem
But…
Different option.
[…]
Great idea, works like a charm! Thank you thank you thank you
I’ll clean up the script and then make it available for everyone (just in case there are other Sigma Foveon Quattro photographers besides me who would like to use darktable ;-))
Thank you thank you thank you 