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- Newsgroups: sci.math.num-analysis
- Path: sparky!uunet!cs.utexas.edu!convex!riogrande.cs.tcu.edu!nuntius
- From: Dick Rinewalt <rinewalt@gamma.is.tcu.edu>
- Subject: Re: WANTED: Algorithm to fit data points to ellipse
- Message-ID: <1992Jul31.161307.21857@riogrande.cs.tcu.edu>
- Sender: news@riogrande.cs.tcu.edu
- Organization: Texas Christian Univ Comp Sci Dept
- X-Useragent: Nuntius v1.1b3
- References: <1992Jul30.235659.23179@terminator.cc.umich.edu>
- Date: Fri, 31 Jul 1992 16:13:07 GMT
- Lines: 18
-
- In article <1992Jul30.235659.23179@terminator.cc.umich.edu> Dave Reimann,
- reimann@terminator.cc.umich.edu writes:
- >I need an algorithm to fit a general ellipse to a set of data points.
- >By generalized ellipse, I mean one that accounts for any tilt in the
- >major axis wrt the x-axis. The data is expected to have some estimation
- >error, so I need to handle that.
-
- There is an ellipse fitting routine in NIH Image available by anonymous
- ftp from alw.nih.gov in the /pub/image directory. Comments in the Pascal
- code say that the routine is due to
- Bob Rodieck
- Department of Ophthalmology, RJ-10
- University of Washington
- Seattle, WA, 98195
- (206) 543-2449
- The comments also reference
- Cramer, Mathematical Methods of Statistics, Princeton Univ. Press, 945,
- page 283
-