2954Re: d e parameters
- Oct 2, 2006On Monday, October 02, 2006 at 10:44, JD Smith wrote:
> How commonly do people find they need to allow non-zero d and e parametersalways and individual for each image. Stitching of scanned images
would be much worse without.
> (which change the center of the radial aberration coefficients a, b, and c)Not only for rectilinear lenses, for all kinds in fact. And not only
> for rectilinear lenses?
for the center of a, b and c correction but for the complete lens
remapping. However, they are not so much needed for longer focal
> How large of a shift is typical? Does anyone haveI simply optimize them and the result is much better afterwards. For
> recommendations for good test images to assess whether d and e should be
> nonzero (standard "building at a distance"?).
a digital camera with a fixed focal length lens optimization of per
image d and e parameters might not be necessary. For our D70 they are
pretty constant at about 13 and 9 pixels...
Resources, not only for panorama creation:
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