Same problem here. Some monochrome 8bit images are not shown in the browser. Others do show up. I do not see any difference between those shown and those not shown.
I found the issue. RT 4.2 is unable to “see” JPEGs saved as ‘Grayscale’ (original program was Adobe PS CS3). When I save the image as ‘RGB’, RT 4.2 is able to see the image.
Is there any plan for supporting single-channel images in the future? Lot of my old images are grayscale TIFFs where the difference between RGB and single-channel 16b image size is huge (70MB per image for 16Mpixel)
Photoshop CS3, my main RAW processor, does not support JPEG 2000/JPEF.
No plan as far as I’m aware (it’s RawTherapee not MonochromeTiffOrJpegTherapee, so the people involved are generally interested in enhancing raw support), but if you submit a patch which does that I will support accepting it.
What do you suggest for raw files coming out of Leica Monochrom, which are single-channel grayscale?
I am not a software programmer, but only a user, so I cannot help with the patch but I find the scope of RT much greater than just a raw processor and almost a complete image processing tool.
“The camera is able to alter the captured image to apply three toning effects (called sepia, cold, and selenium).”
So the camera produces RGB JPEGs too.
Your options:
Patch RawTherapee,
Use a JPEG mode in the camera which saves RGB JPEGs, or batch-convert the single-channel JPEGs to RGB JPEGs, using e.g. ImageMagick’s convert command,
Don’t shoot JPEG on a $5000+ camera. Shoot raw (DNG).
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but I find the scope of RT much greater than just a raw processor and almost a complete image processing tool.