Image analysis – Histogram processing – For setting a threshold
Patent
1990-06-04
1991-11-05
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
2502081, 382 46, 382 68, G06K 900
Patent
active
050636057
ABSTRACT:
A method for scale and rotation invariant pattern recognition. The method involves the recogniziing of patterns, such as visual images of objects, irrespective of scale or two-dimensional orientation. A prior art format for representing data known as a polar exponential grid or PEG format is utilized. For storage, patterns are centered, transformed into a PEG representation, and the centered PEG representation is stored in an associative memory. For recall, patterns are likewise centered and transformed into a PEG representation. They are then first scaled up until the outer layer of the PEG grid is activated, and then incrementally rotated until either a desired level of match is found with some stored pattern, or until a 360 degrees rotation has been completed without a match. Hardware implementation for the PEG transformation and for the incremental rotation and scaling are described.
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"Toward the Robot Eye" Schenker Brown University Technical Report Jul./Oct. 1981, pp. 8 et seq.
Atlass Michael B.
Boudreau Leo H.
Honeywell Inc.
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