On Sat 23-Feb-2013 at 09:25 -0800, David Horman wrote:
> and I suspect doing it like this would avoid the nasty 'whorl'
> artefacts we get at the zenith/nadir (this assumption needs
> testing).
Do you have an example of the whorls?
You see the 'whorls' when you stitch to equirectangular, then look
at the zenith/nadir of this image in another projection:
https://secure.flickr.com/photos/brunopostle/2992823375/sizes/l
https://secure.flickr.com/photos/brunopostle/2772902694/sizes/o
https://secure.flickr.com/photos/brunopostle/3609804177/sizes/l
If these had been stitched directly to stereographic, then there
would be no artefact at the zenith.
--
Bruno
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