[ptx] Nona vs. PTStitcher accuracy

[John Bäckstrand]

Am I right in believing that PTStitcher has got much better accuracy 
than nona? I get pretty serious "jaggies" between images with nona, and 
a much better result (almots perfect) with PTStitcher, on the same 
panorama. Is this rounding-errors or something else?

I love enblend, so it would be nice to be able to use nona with the same 
results.

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John Bäckstrand