[Radiance-general] vignetting correction on a fish-eye image
Lars O. Grobe
grobe at gmx.net
Tue Apr 6 00:37:30 PDT 2010
Hi!
> ***I am curious how to develop a Radiance-based post-process from
> this polynomial function to arrive at a script that will take a HDR
> image and apply a vignette correction.
>
All you have to do is to multiply your pixel values by your f(x) with x
being the radius to the center. This can be done just using pcomb. Make
sure to include the -o switch to eliminate any display settings
(exposure etc).
Be aware that "center" is the optical axis and not necessarily the
center of the sensor, so you must find out the pixel position of it.
Cheers
Lars.
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