UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hello,
I played around creating master flats with APP and have the following questions:
1) When directly using the NEF-files to create a master flat, the MF turns out to be a greyscale image with an odd looking pixel pattern. Is that correct?
2) When converting the NEF files into TIFF and creating a master flat, the MF is a RGB image and displays as one would expect (vigneting, dust artefacts, etc.).
3) Why is the MF so different (greyscale vs. RGB) when using NEF or TIFF?
4) When using NEF, does APP account for the orientation/rotation of the frames? Does APP rotate the individual frames when they are originally orientated differently, before creating a master flat?
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Thanks!
Chris
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1) When directly using the NEF-files to create a master flat, the MF turns out to be a greyscale image with an odd looking pixel pattern. Is that correct?
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Yes. If you zoom in on a RAW (NEF for Nikon) image without RAW processing, you will see a the colour filter array (CFA) pattern. The RAW image is actually a greyscale image. Its the position of the pixels that determine whether the pixel is a red, green or blue pixel.
The master flat is an averaging of the RAWs, pixel-for-pixel.
2) When converting the NEF files into TIFF and creating a master flat, the MF is a RGB image and displays as one would expect (vigneting, dust artefacts, etc.).
3) Why is the MF so different (greyscale vs. RGB) when using NEF or TIFF?
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You are not supposed to convert the RAW because then 4 grey pixels representing R, G, G and B are blended into 4 colour pixels, each one containing R, G and B components. To calibrate your lights, you use the RAWs to create a master calibration frame that is applied to the light RAW, pixel-for-pixel grey level before colour conversion.
4) When using NEF, does APP account for the orientation/rotation of the frames? Does APP rotate the individual frames when they are originally orientated differently, before creating a master flat?
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Regardless of the orientation of the picture when taken - this is meta data in the RAW file, the RAW file image data will always be the same, so orientation is always relative to the physical sensor and so does not need to be considered in calibrating and stacking.
