Lars, Thank you for the explanation, that makes sense.
-Mio S. On Fri, Aug 7, 2015 at 8:54 AM, Lars O. Grobe <[email protected]> wrote: > Hi Mio, > > from my understanding (important disclaimer...), such an option would not > be possible or usefult. The response function maps the pixel value to a > sensor signal (sensor illuminance) by comparing the values of pairs of > pixel values at different exposure settings. If e.g. the pixel coordinate > on the CCD x1y1 has leads to a pixel value of 100 at an exposure time of > 100ms, and of 50 at an exposure time of 50ms, the response would be flat. > So the idea of reconstructing the response curve is based on the assumption > that you have several frames of the same scene to compare, and that the > exposure differs between those frames. Even if you got the response time of > your camera, it would not be useful - as you are assuming to work with raw > sensor data. So what is in the file should be what the sensor gave as a > signal. > > Cheers, Lars. > > All, > > Does anyone know if there is a -r option (to write/use a camera response > function) for raw2hdr like there is for hdrgen? Using -r with raw2hdr now > gives me an error message that states that -r is not a supported option. > > Thank you, > Mio Stanley > Graduate Student, University of Colorado Boulder > > > _______________________________________________ > HDRI mailing > [email protected]http://www.radiance-online.org/mailman/listinfo/hdri > > >
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