[ptx] hugin interpolator problems

[Rich]

Rich wrote:
> while trying out different interpolators, i noticed some problems and 
> weird things.
> 
> 1. sinc 256 produces artifacts in the sky
> 
> this seems similar to problem enblend used to have
> http://enblend.sourceforge.net/banding.htm
> though artifacts are different here.
> 
> a quick picture fragment with artifacts : sinc_256_screen.jpg

of course, it should have been like this :
http://evf.lv/stuff/sinc_256_screen.jpg
(though it seems that artifacts are not visible in a browser - they are 
visible in gimp, kuickshow and probably other programs)
...
-- 
  Rich