I was once involved in the "opposite" idea, measured CAD drawings from
current photos, using what was called the the Rolleimetric MR2
program. As it was a system of software and hardware, fairly expensive
back in the early 1990s and the transition to visual computing was
starting, I looked around. I can't recall the name of the software, I
think at the University of Montreal, it used a known or estimated
distance in a photo, i.e. a window well, and used that digitized
distance to make a drawing from digitized (mouse pointed out) places
on the photo, photos just beginning to be a part of Windows. It was in
development, as was the AutoCAD interface with Rollei, which didn't
"pan out" commercially as universality came into demand in drawing
interchange formats (dxf), the close-range photogrammetric data can be
used inside many CAD programs. I just read Adobe now reads AutoCAD dwg
files and creates very good pdf (portable document) files complete
with layers, a naming standard of which has been proposed for
archaeology so attributes would be on standard named layers for
archiving.
The Fourmilab in Switzerland, run by the co-author of AutoCAD John
Walker has a weekly match-up of old photos from post cards etc., with
modern photos online, overlaid in the window to make comparisons. He
might be a source of information, AutoCAD has built in "cameras" etc.,
in double precision needed for accurate 3D mathematical depiction and
has expanded into rendering, mapping, etc.
http://www.fourmilab.ch/
George Myers
|