Real-time transformation of incoherent light images to edge-enha

Details Real-time transformation of incoherent light images to edge-enha Real-time transformation of incoherent light images to edge-enha

1980-11-21

1983-02-01

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

3401463AE, 356376, G06K 958

Patent

active

043718663

ABSTRACT:
Cross-correlation of an image with a reference pattern is done in order to etermine recognizable content and gives a sharp correlation peak whenever both image and pattern are edge-enhanced, darkfield representations. Incoherent light, conventional optics and electronics are used to obtain edge-enhanced, darkfield representations which are obtained by sending the light from the object through a dual-aperture unit to a lens so that a recording medium located forward of the focusing plane of the lens will receive light blocked alternately by the regular (perimeter) stop and the central stop and will record the difference.

REFERENCES:
patent: 3016518 (1962-01-01), Taylor
patent: 3366926 (1968-01-01), Silsby et al.
patent: 3882454 (1975-05-01), Marie et al.

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