On Mon 01-Feb-2010 at 10:15 -0800, Chris Parrish wrote:
Ok, so perhaps I've found a Hugin bug. The EV's I posted earlier were auto calculated by Hugin when I added my JPEGs to the project. I just selected them all now and did a reset in the camera tab (selecting only to reset the EXIF values), and now they are all properly (consistently) calculated. When I get some free time, I'll see if I can reproduce it.
These diffent values could be the result of the photometric optimisation step in the Hugin Align process.
So my only questions are: * Is Hugin somehow getting EXIFTOOL to output more precise values (like 0.333333s vs 0.3) or is Hugin just making its own assumptions?
Hugin uses the exiv2 library for reading EXIF, it only uses exiftool in the stitching process to copy metadata to the output files.
* Should Hugin be calculating EV taking ISO speed into account?
I think it probably should. I had noticed this too with auto-exposed photos, but ignored it.
Hugin should also assume missing values. With my manual lens the camera only writes shutterspeed and ISO information and leaves the aperture field empty, the result is that if I load a bracketed set the EV values are all 0.0 despite there being enough information to get the relative Exposures correct.
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