T. Modes wrote:
>> Why does hugin deal with absolute values of exposures of images?
>>
>> Can we bring in all of the images with an exposure of zero and then just
>> apply exposure compensation instead?
>>
>
> When using LDR output (enblend, enfuse) relativ or absolute exposure
> should make no big differences. But when output HDR images you get a
> other output with an ev values of e.g. 13 than with ev 0. But I don't
> know which output is preferred.
The idea was that:
1. A relative exposure compensation cannot be read from the exif data.
Of course this only applies when hugin does read the images correctly.
2. If a "true" hdr needs to be generated, the exposure values of the
camera should be used (unless they are not accurate), because there is
an ambiguity when estimating exposure and response curve at the same time.
3. It becomes possible to directly combine HDR's produced by hugin from
the same camera, regardless of the source exposure, as they are all in
some absolute space. If camera manifactures would use the same
definition for ISO, this would even work across cameras, but probably
today it doesn't.
ciao
Pablo
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