Correlation detector for images

Details Correlation detector for images Correlation detector for images

1991-07-17

1993-02-23

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

364819, 365149, 382 30, G06K 964

Patent

active

051897121

ABSTRACT:
A correlation detector for images including: a unit for converting pixel signals of two images into digital data; a unit for deriving either an absolute value of a difference between the two pixel signals or a product of the two pixel signals from a table in accordance with pixel signal values of the two images; a unit for converting the derived value into an analog value; and a unit for storing electric charges while converting the converted analog value into a current value which is proportional to the converted analog value. Since the correlation between the two images are calculated using a table and the addition is performed in terms of storing electric charges, the correlation detector can be down-sized with simple circuits and its operation speed is improved as well.

REFERENCES:
patent: 4574357 (1986-03-01), Pastor et al.
patent: 4623923 (1986-11-01), Orbach
patent: 4939575 (1990-07-01), Childers
patent: 4998286 (1991-03-01), Tsujiuchi et al.
patent: 5007101 (1991-04-01), Iwahashi et al.

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