Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!wuarchive!cs.utexas.edu!asuvax!ncar!tank!fungus.bsd.uchicago.edu!james From: james@fungus.bsd.uchicago.edu (James Balter) Newsgroups: comp.graphics Subject: Re: how to match 2 views to an object Message-ID: <6668@tank.uchicago.edu> Date: 10 Dec 89 22:26:22 GMT References: Sender: news@tank.uchicago.edu Reply-To: james@fungus.bsd.uchicago.edu.UUCP (James Balter) Organization: University Of Chicago, Dept. of Radiation-Oncology Lines: 16 The problem of finding the projections given two sets of matching points has been demonstrated solvable for radiographic projections in an article by Laura Fencil and Charles Metz published in MEDICAL PHYSICS recently. It states that, in optimal conditions on non-coplanar points, that 8 point pairs are needed to find the original projection information A more interesting problem, though, is how to find the correspondance between two arcs in different projections, where all that is known is that there is SOME overlap to the arcs. James Balter james@rover.bsd.uchicago.edu "If the hat fits, slice it!"