fieldOfView | SPi-V devday - night - positioning a nodal point
Submitted by k_kwiatek on June 8, 2006 - 00:08.
Do you know a method to find the position of a nodal point, not after a few hours but after a few weeks?
I am writing about a script similar to "day-night" where the 2nd panorama was
taken after a few hours.
How can I do this with taking a tripod to home and after a long time take a parorama in exactly the same position (in order not to see differences between panoramas in SPi-V).
Do you have easy methods, not photogrammetric/geodetic ones.
Karol Kwiatek
Use a Laser Pointer
I would hang a cheap $15 laser pointer or plum line from the hook on the base of your tripod. This should mark the center of the trypod and therefore the nodal point. Mark the place someone, and when you go back it setup your tripod make sure the markers line up. I must admit that I have not tried this as of yet, but I will tommorow and let you know how it goes.
Tony
Not much difference
There's not much difference in shooting within a couple of hours or a couple of weeks difference... I shot mine handheld, using a plumb wire or 'Philopod'.
When stitching it helps to first stitch one, and then use this stitched image as an anchor for the second panorama; adding control points not only to each pair of images from the second panorama, but also between the images of the second panorama and the first, stitched panorama.
That is, if you are using PTGui or PTMac...