Re: WANTED: Algorithm to fit data points to ellipse

Article View: sci.math.num-analysis

Article #157

Back to sci.math.num-analysis Previous Next

#157

From: Dick Rinewalt
Date: Fri, 31 Jul 1992 16:13

18 lines
1292 bytes

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

Technical Details

Message-ID: <1992Jul31.161307.21857@riogrande.cs.tcu.edu>

Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!convex!riogrande.cs.tcu.edu!nuntius

References: <1992Jul30.235659.23179@terminator.cc.umich.edu>

Show Full Headers

Complete Article Headers

Newsgroups: sci.math.num-analysis
Path: arc1-ca.pugleaf.net!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

Reply to Parent Message