Quote:
Originally Posted by avandonk
The very dim unresolved stars show up as a faint green with HDR and DSLR's as DSLR's have twice as many green pixels as red or blue. If it was light pollution it would be far more uniform.
Bert
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Do you have any references to support your statements?
Surely if the dominant colour from hydrogen is towards the red end of the spectrum, wouldn't a prolonged exposure give greater pixel well filling for those pixels under the red filter of the bayer chip, which would then give a greater red colour to the processed pixel? If you were dealing with unprocessed FITS files, I would seem plausible that the greater number of green pixels would have an impact?
The data you are applying the HDR algorithm is from compressed JPEGS of a stack of colour converted images from a Bayer chip. There are a number of mathematical processes that this data has undergone, which could result in an artefact - hence my original question.
I'm not trying to take away from the beauty of this image, but am wondering if you are trying to read to much into this potentially compromised data?
DT