Image analysis – Histogram processing – For setting a threshold
Patent
1987-12-17
1989-09-05
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
36472805, 365230, 382 42, G06K 900
Patent
active
048646296
ABSTRACT:
A method and apparatus for controlling a parallel combination of correlation circuits which compare image pixels. A number of correlation circuits are provided, each having its own memory. The memories are loaded with image data with each memory being assigned a different block (region) of the image. Each memory is also loaded with an overlapping portion of an adjacent block so that a pattern can be stepped across the entire block, including a match of the first column of the pattern with the last column of the block. The loading is done by generating addresses corresponding to addresses for the source image with one or more of the most significant bits modified so that the address sequence received by the second and subsequent memories are identical to the address sequence received by the first memory. This allows the various blocks of the image in the different memories to be later simulataneously accessed in parallel using a single address sequence.
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Boudreau Leo H.
Carroll David H.
Colwell Robert C.
Haughey Paul C.
Schlumberger Technologies Inc.
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