Correlation peak degradation for out-of-plane rotation in an optical pattern recognition system

Helgard R. Honiball; Filippus S. Roux

doi:10.1117/12.175672

1 September 1994 Correlation peak degradation for out-of-plane rotation in an optical pattern recognition system

Helgard R. Honiball, Filippus S. Roux

Author Affiliations +

Optical Engineering, Vol. 33, Issue 9, (September 1994). https://doi.org/10.1117/12.175672

Abstract

Optical correlation is sensitive to out-of-plane rotations of the object in the input image. Such an out-of-plane rotation causes the correlation peak to degrade. Here, the degradation of this correlation peak is investigated and a model is proposed to explain its behavior for arbitrary convex objects. First an analytical expression is derived for the peak degradation caused by out-of-plane rotations of flat objects, which is equivalent to a scaling in one dimension. This analytical result compares favorably with experimental results obtained from computer simulation. The 1-D theoretical model is then generalized to explain the behavior of the correlation peak for out-of-plane rotations of arbitrary convex objects. Experimental results for the latter case are also provided.

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Helgard R. Honiball and Filippus S. Roux "Correlation peak degradation for out-of-plane rotation in an optical pattern recognition system," Optical Engineering 33(9), (1 September 1994). https://doi.org/10.1117/12.175672

Published: 1 September 1994

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