Real time two-dimensional digital correlator

Details Real time two-dimensional digital correlator Real time two-dimensional digital correlator

1982-07-19

1985-03-12

Malzahn, David H.

Boots, shoes, and leggings

G06F 1531

Patent

active

045049238

ABSTRACT:
A technique for correlating two images, differing in size, but of identical spatial content. The technique is based on the Cauchy-Schwarz Inequality and is derived in such a way as to eliminate the requirement for division, thereby realizing practical real time implementation with presently available electronic hardware. In the embodiment disclosed, reference and data image signals require no pre-processing for the removal of mean and gain factors prior to being individually supplied to the correlator. The correlator is built around modules which can be configured serially with delay lines to adapt to virtually any image configuration. Simulation tests have shown the embodiment to be superior to prior art correlators utilizing other algorithms under conditions of noise, offset and gain differences.

REFERENCES:
patent: 3908118 (1975-09-01), Micka
patent: 4347580 (1982-08-01), Bond
patent: 4368456 (1983-01-01), Forse et al.

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