💾 Archived View for lasse.nerdcamp.net › static › dng-in-lightroom-ohne-demosaicing › index_en.gmi captured on 2023-01-29 at 15:46:24. Gemini links have been rewritten to link to archived content
⬅️ Previous capture (2022-07-16)
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To get the most out of my E-500_Panchromat, I had to develop each image with DCRAW.
../olympus-e-500-panchromat-umbau-auf-monochrom/index_en.gmi
../e-500-panchromat-raw-dateien-entwickeln/index_en.gmi
That left me with an additional 16MB TIFF file for every 13MB RAW file, which is not especially space efficient really. Using the Adobe DNG Converter instead yields a nice, losslessly compressed DNG around 8MB each.
http://www.adobe.com/support/downloads/product.jsp?product=106&platform=Windows
After some hours of fiddling I finally managed to convince Lightroom into treating them like files from the Leica Monochrom, so that there is no demosaicing taking place anymore! Here's what you have to do:
- Set the value of the Tag 262 (PhotometricInterpretation) to 34892. It's supposedly 32803; if not, you're probably looking in the wrong IFD.
- Remove the Tags 50721 (ColorMatrix1) and 50722 (ColorMatrix2) altogether. They're in the other IFD ;)
Big question is where to get a decent TIFF tag editor? I didn't find one and eventually stopped searching. Since the TIFF spec's are open and downloadable from Adobe, I finally put together a little tool for myself. Not pretty, but gets the job done.
https://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
Here's such a modified file for your personal enjoyment.
2015-05-18 created
2021-12-26 on gemini