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Re: find rotation between two images [message #40892 is a reply to message #40702] Fri, 10 September 2004 14:35 Go to previous messageGo to previous message
dcw_yip is currently offline  dcw_yip
Messages: 22
Registered: October 2003
Junior Member
Do some simple feature extraction and then do a least-squares fit.
Look up the paper in IEEE transactions entitled "Least-Squares Fitting
of Two 3-D Point Sets" by Arun, Huang and Blostein. I wrote some code
to do basically what you are describing. Their paper is very clear
and took me about an hour or two to code up. You won't get exact
rotation angles. They'll be within a half a degree or so.

There are also some enhancements to their algorithm to give you
scaling, shearing, etc, etc if you need that.

David

tbeetz@yahoo.com (Tobi) wrote in message news:<7f0cc27.0409011354.45cce42f@posting.google.com>...
> i have several images where i would like to find the rotation and
> shift compared to a reference image. i use an alignment routine to
> seperate the shifting part. however, there is still the remaining
> problem of image rotation. is there a routine available? thanks!

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