"Bill Pragnell" <bil### [at] hotmailcom> wrote:
> "Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> > > > Maybe post some details of your difficulties, or if you'd like you can email
> > > > me directly.
>
> Here's a pair of angular maps that demonstrate my issue (scaled down to 512x512,
> but it's still evident). I've marked corresponding pixel locations with red
> crosses.
>
> http://www.infradead.org/~wmp/angular_eg.png
>
> It's interesting, now I come to actually look at this in detail, it seems to be
> most pronounced on the horizontal. This suggests to me that keeping the ball
> more central will definitely help...
>
> Bill

Actually, by the looks of it, I think that the technique I described may help
for this as there does appear to be lopsided distortion in the rotated image,
as I would expect from perspective distortion.  Give it a try, let me know if
you need any help getting it to work.
What is your ball size to distance ratio?

-tgq

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