Newsgroups: sci.image.processing
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From: k9ape@eecs.nwu.edu (Sheldon L. Epstein)
Subject: Re: skew rotation 
Message-ID: <D0D9qv.F4B@eecs.nwu.edu>
Keywords: angle correction after scanning
Sender: usenet@eecs.nwu.edu
Organization: EECS Department, Northwestern University
References: <D06GBu.1yp@si.hhs.nl>
Date: Tue, 6 Dec 1994 02:04:06 GMT
Lines: 32

In article <D06GBu.1yp@si.hhs.nl>, Gink <v912069@si.hhs.nl> wrote:
>Hello !
>
>I'm currently working on a music score recognition program. So far I've been able
>to read in the PCX-file containing the music score. The program can also determine
>the angle of displacement of the music score (displacement during scanning). I'm
>looking for an algorithm which corrects this displacement.
>
>I've already found an algorithm which works with blocks of pixels but this distorts
>the music score too much. If somebody has an algorithm which works pixel by pixel
>that would be of great help. Any pointers to literature are also greatly appreciated.
>
>Thanks in advance,
>		Arjen van Gink
>
>
Hello Arjen,

	I suggest that you look at books and articles that are listed under:

		Geometry, Affine
		Geometry, Projective

A few months ago, some listed C source code for the Affine Transform.  You
might want to ask for a re-transmission.

		Best Wishes,

			Shel Epstein, k9ape@eecs.nwu.edu
			Chief Engineer
			Epstein Associates

