Rotation-invariant discrimination between almost similar objects.
A modified circular harmonic filter may be used for the rotation-invariant discrimination of a target from another object which contains the same pattern as the target. The method is illustrated by the experimental rotation-invariant detection of the letter F in the presence of the letter E.
Arsenault
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Universite Laval, Departement de Physique, Laboratoire de recherches en optique et laser, Quebec, P. Q. GlK 7P4.
Hsu
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