Method of and apparatus for converting image signals representin

Details Method of and apparatus for converting image signals representin Method of and apparatus for converting image signals representin

1993-12-21

1995-10-24

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358465, 358464, H04N 140

Patent

active

054614902

ABSTRACT:
Sample areas are designated in a plurality of original images. Histograms representing density distribution for each color component are generated on the basis of the density signals for respective sample areas. Representative average density values in highlight-side and shadow-side in respective sample areas are determined from the histograms. A weighted average of respective representative average density values for the sample areas is calculated to obtain representative density values commonly applicable to the plurality of originals. The difference between the representative density values and the respective representative average density values are calculated, and, if the differences are within a predetermined range, reference density values for each color component are obtained on the basis of the common representative density values. The reference density values are used to define color separation rules common to all of the originals.

REFERENCES:
patent: 4369471 (1983-01-01), Hirata
patent: 4514767 (1985-04-01), Kubota et al.
patent: 4562486 (1985-12-01), Suzuki et al.
patent: 4578712 (1986-03-01), Matsunawa
patent: 5062144 (1991-10-01), Murakami
patent: 5065257 (1991-11-01), Yamada
patent: 5115478 (1992-05-01), Sugiura
patent: 5243668 (1993-09-01), Kitamura et al.
patent: 5274469 (1993-12-01), Small et al.
patent: 5359430 (1994-10-01), Zhang

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