On Wed 19-Dec-2012 at 12:13 +0100, Frederic Da Vitoria wrote:
But now that I think of it more closely, I understand that JohnPW's question is still unanswered and that my answers completely missed the point. I expect the faux-bracketing to keep the lightest parts of the darkest exposure and the darkest parts of the lightest exposure.
I'm not entirely sure what you are trying to do, but Hugin will extract 'bracketed' exposures from any photo. By default it uses a 'sigmoidal' camera response curve to map the data to linear space, multiply and then map back again - This curve will be quite accurate if you have calibrated your camera photometric parameters.
All you have to do is load your photo and increment Eev for the input or output.
You can then enfuse these brackets, but this process only really makes sense if you start with 16bit per channel data created from RAW.
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