Method and apparatus for finding objects within a visual display

Details Method and apparatus for finding objects within a visual display Method and apparatus for finding objects within a visual display

1986-12-16

1988-06-07

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 50, 358282, G06K 938

Patent

active

047502100

ABSTRACT:
A signal processing circuit for enabling a computer to quickly scan a memory having stored signals which represent a video image includes a flag generator responsive to a lit pixel detector for providing a flag signal to the memory to be stored in an address location indicating the presence of at least one lit pixel in that row. Incoming video, which includes data and sync signals, is digitized and examined by the lit pixel detector and a flag signal is clocked into memory at a predetermined address. The computer scans these address locations, which lie in a single column, to determine the identity of rows having a flag signal. This eliminates the need for the computer to scan the entire address space to locate an object of interest.

REFERENCES:
patent: 4547676 (1985-10-01), Suzuki et al.
patent: 4562486 (1985-12-01), Suzuki et al.

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