Hey Terry, I still think there is a market for a convenient tool of this kind. I know a commercial plumbing contractor who would love to measure spaces with photos rather than a tape measure -- 1/8 inch error per 30 feet would be sufficient, that's about 0.02 degrees.
Jan: All you can do from a single point of view is measure angles around that point. Bur a pano should give more accurate angles than a single photo, since the alignment process involves at least partially correcting lens errors. Indeed, a 360 degree pano with 50% overlap and lots of control points might achieve accuracy in the 0.02 degree range without any additional lens calibration (provided there is no wobble in your pano head, lens does not shift on mount or change focus, etc, etc). Two or more such panos taken from different points of view could give you a bunch of good triangulations. Then by measuring just one actual distance you can compute all the others. -- Tom On Nov 24, 9:54 pm, Tduell <[email protected]> wrote: > Hullo Jan, > > On Nov 25, 11:50 am, Jan Martin <[email protected]> wrote: > > [snip] > > > If one knows the size of a single object, e.g. of a car, in a digital image, > > one should be able to measure anything else in it. IS this true for panos > > to? > > I don't think that is possible without having a stereo pair and some > real world 3d coordinates of control objects in the image. > The problem is that a normal digital image, and a derived pano are > only 2D, and while you will be able to a measure relative sizes of > objects on the 2D plane of the image, you don't have the info to know > where the objects are in the 3rd dimension, hence could a small object > close, or a large object further away. > > Cheers, > Terry -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
