PanoTools mailing list archive

PanoTools NG: Re: Sigma 8 F3.5 and its sharpness Hans Nyberg 2007-May-16 11:23:30

--- In #removed#, "Roger D. Williams" <roger@...> wrote:

> camera on a unipod, there are up to six degrees of freedom for the
> relative camera movements between shots. Since it would take at least
> two points to define each degree of freedom, that makes at least 12
> points at each seam as an absolute mininum. In view of the warping
> that is also going on, I would have thought double that to be no more
> than a safe minimum.

Roger
With a perfect optimized panohead and your lens  calibrated for corrections and shift you 
only need 2 control points per pair.
1 for the yaw and pitch and 1 for the rotation.

Of course handheld panos is another case.

Here is a test you can see.

1. http://www.panoramas.dk/panorama/test/PTgui-autocontrolpoints.html
Stitched with PTGui using auto controlpoints 15 per pair. Manually optimized for lens 
corrections and for yaw-pitch and roll.

2. http://www.panoramas.dk/panorama/test/PTgui-2-controlpoints.html
Stitched with PTGui using 2 manually controlpoints per pair. Template with my standard 
lens correction applied, optimized for only yaw, pitch and roll

Note that this is just a raw stitch.
If you want to see the final pano optimized with "digital lightning" and for color and 
sharpness it is here. First one from Elmelunde
http://www.panoramas.dk/church-murals/index.html

Hans
www.panoramas.dk



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