OBJECT RECOGNITION USING SIGNATURES
Date
1996-10-01
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Abstract
A method is described for quickly detecting the similarity between
planar shapes. By normalizing the distance from boundary to its geometric
center, a 2D shape can be represented as a 2$pi$ periodic function which
is invariant to both translation and scaling. In this function, the
orientation of the original shape is converted to the translation only
in one direction. In this way, it becomes easier to handle. The
similarity measurement is the minimum value over the translation from 0
to 2$pi$. Experimental results are included for the comparison of a
group of 24 shapes.
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Computer Science