On Saturday, March 01, 2008 at 17:55, Victor wrote:
> The correction is hard-coded for lens, and if zoomable, for the zoom
> setting, etc. as read through EXIF.
...which gives a theoretical vignetting value without guarantee that
this meets the real situation.
> PTGui does an excellent job, but is calculating the correction on the
> fly and that may be affected by what's in the picture.
The algorithm (based on a paper by Pablo d'Angelo BTW), is pretty
robust and gives very good results - and of course it works on the
real vignetting, not a theoretical value.