[Numpy-discussion] nd_image.affine_transform edge effects

Stefan van der Walt stefan@sun.ac...
Tue Mar 13 03:55:40 CDT 2007


Hi James

On Fri, Mar 09, 2007 at 08:44:34PM -0300, James Turner wrote:
> Last year I wrote a program that uses the affine_transform()
> function in numarray to resample and co-add datacubes with WCS
> offsets in 3D. This function makes it relatively easy to handle
> N-D offsets and rotations with a smooth interpolant, which is
> exactly what I wanted. However, I am finding that the results
> contain edge effects which translate into artefacts in the
> middle of the final mosaic.

Is this related to

http://projects.scipy.org/scipy/scipy/ticket/213

in any way?

Code snippets to illustrate the problem would be welcome.

Regards
Stéfan


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