5680Re: number of images at non-zero pitch?
- Jan 3, 2007--- In PanoToolsNG@yahoogroups.com, "Erik Krause" <erik.krause@...> wrote:
> On Wednesday, January 03, 2007 at 20:21, pedro_silva58 wrote:
> > this is just what i needed! i guessed there should be a cosine
> > somewhere, but didn't quite know where. oh, and subtracting half the
> > vertical fov is a very thoughtful touch, but may not be strictly
> > necessary. with it, we get the minimum overlap, without, an average
> > overlap (i think).
> In my example with 20° horizontal FoV you would need only 12 images
> at 60° but 16 images at 45° (lower edge). 12 images cover 240°
> (without overlap!) but at 45° you need 254° (=360*cos(45)). This
> means you won't have any overlap at the bottom side.
i appreciate your efforts in getting this right. i agree that
subtracting half the vertical fov, while not _always_ necessary, is
the right way to do it, and is safer.
on the other hand... how many images you need, depends on overlap
(yes, of course ;-) ). i understood your example to be an
illustrative example only. if you regularly shoot for only 20%
overlap you are a braver man than i am.
- << Previous post in topic Next post in topic >>