. . . it just drops a small amount of vertical resolution.
"drop vertical resolution"? How would it?
The tripod is generally level as well (with bubble level) but as we know even bubble level will show some slight tilt in a big pano.
Right - thatÂ´s obvious. But not a problem at all.
Anyway, in spite of this, APP sometimes screws is up because it is not realizing that the images are regular, and thinks they might have more arbitrary and varying roll or pitch when the ones in a row are all the same.
It does this because SIFT sometimes will match up on items displaced by parallax -- yes it happens even on a pano head -- or because they moved. In particular if it happens to get clouds or people it will match and get confused.
Of course thereÂ´s always a problem when objects - like clouds or people - move. ThatÂ´s in the nature of stitching . . .
But you can very well work around that. ThatÂ´s in the nature of stitching . . .
And this is the problem. Yes they feature matching makes it look like the image has a different roll, for example.
No problem at all. The optimization cam handle that very good.
I want to tell it, NO, it never does. If you find a match that makes you look for a solution that implies a different roll (or different focal length etc.) that match is probably wrong, so discard or downrate those CPs.
Look: stitching means that the stitcher manipulates the size/orientation of images in a way they can be stitched. All stitchers do that and without that you canÂ´t stitch images.
The only way to avoid it is the use of a scanner-camera like the Spheron, Seitz Roundshot and one or two others. If you pay around 50000.-â‚¬ for a Spheron youÂ´ll be even able to make precise measurements in the panorama.
ThatÂ´s possible because they A) donÂ´t stitch but scan the whole image as one piece and b) they can shoot stereo from zwo viewpoints around 10cm apart from each other:http://www.spheron.com/en/spheron-cgi/products/3d-measurement.html
When you stitch images for generating a panorama the images always get manipulated in size and orientation - to a very low amount - for being matched. ThatÂ´s in the nature of stitching.
APG does an extremely well job with irregulary shot images - the best way is to use xml positioning when you deal with uniform blue skies, large white walls or comparable situations.