Distortion- and intensity-invariant optical correlation filter system

Details Distortion- and intensity-invariant optical correlation filter system Distortion- and intensity-invariant optical correlation filter system

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1567..480r&link_type=abstract

Proc. SPIE Vol. 1567, p. 480-489, Applications of Digital Image Processing XIV, Andrew G. Tescher; Ed.

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A new approach to intensity-invariant filter design is introduced. This approach post-processes a distortion-invariant correlation response. The correlation responses of a filter bank are mapped into a 3-D volume matrix where the third dimension is intensity. For each given intensity level the volume matrices are weighted by a complex exponential with unit magnitude and linear in phase. These weighted volume matrices are summed together to form filter volume matrix. Pages or slices from the volume are used as a bank of 2-D correlation filters. Computer simulations are included to quantify the performance of this approach.

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