Newsgroups: sci.image.processing
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From: c3768bd@ecf.toronto.edu (CHAN  STEVEN TZE YEUNG)
Subject: Re: What's a Helmert transform
Message-ID: <D383q0.M2K@ecf.toronto.edu>
Sender: news@ecf.toronto.edu (News Administrator)
Organization: University of Toronto, Engineering Computing Facility
Date: Mon, 30 Jan 1995 14:46:46 GMT
Lines: 12

I believe that a Helmert transformation is the
same as a 2D Similarity transformation. ie.

    x' = ax + by + c
    y' =-bx + ay + d

where a,b,c,d are the parameters of the xformation.

---
Steve Chan
Geopower Technologies Inc.
schan@geopower.com
