Very good idea, Pablo. With some suitable averaging, multiple inputs
could be used to beat down the systematics which no doubt vary based on
setup and shooting technique.
> Scope of database:
>
> 1. Distortion correction:
> radial distortion, same as PTLens, 3 parameter radial polynmial, described
> in detail at:
http://wiki.panotools.org/Lens_correction_model> Varies mainly with focal length. Parameters can be estimated at several
> focal lengths and interpolated in between. Each focal length requires a
> single image for calibration.
>
> 2. Vignetting correction:
> radial correction, radial vignetting correction by division:
> I = I / (1 + b*r^2 + c*r^4 + d*r^6)
> The parameters vary with both focal length and aperture.
> Each focal length and aperture setting require 2 or 3 images for
> calibration.
Aren't there 2 other parameters, center of correction, for each of these
(separately) as well? Or are these assumed to vary by camera?
JD
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