Method and apparatus for detecting colored regions, and method a

Details Method and apparatus for detecting colored regions, and method a Method and apparatus for detecting colored regions, and method a

1986-03-06

1988-12-06

Goldberg, E. A.

Image analysis

Histogram processing

For setting a threshold

358106, G06K 900

Patent

active

047900229

ABSTRACT:
A method of color detection, in which electrical signals derived from two quantities, preferably orthogonal quantities, for example (R-L) and (B-L) are digitized. A time-shift is applied to the signals, either before or after digitization, and a difference signal is formed between each original signal, and its time-shifted counterpart. The difference signals are then used as a key to a "lookup" table, to provide an output only when specified combinations of the two difference signals are encountered.

REFERENCES:
patent: 3231860 (1966-01-01), Chatten
patent: 3292149 (1966-12-01), Bourne
patent: 4493420 (1985-01-01), Dennis
patent: 4541114 (1985-09-01), Rutenbar
patent: 4631750 (1986-12-01), Gabriel
patent: 4644584 (1987-02-01), Nagashima

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