Color image processing with undercolor removal suitable for use

Details Color image processing with undercolor removal suitable for use Color image processing with undercolor removal suitable for use

1991-02-19

1992-06-30

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358443, H04N 146

Patent

active

051268388

ABSTRACT:
An image processing apparatus extracts an edge or line portion of an image, judges grayness of the image, and processes the image according to outputs of the means used for the edge- or line-extraction and grayness-determination. The further processing may, for example, comprise undercolor removal and/or black-addition. Edge extraction can be performed by use of a Laplacian. The grayness can be judged by, for example, providing a colorlessness signal formed from two color component signals. Extraction of a line region, instead of Laplacian edge extraction, can be performed, for example, by use of an Hadamard transformation. Also, the invention more generally includes detecting grayness of an image, detecting other characteristics of the image, and judging additional characteristics of the image according to the first two determinations.

REFERENCES:
patent: 4213150 (1980-07-01), Robinson et al.
patent: 4547811 (1985-10-01), Ochi et al.
patent: 4642681 (1987-02-01), Ikeda
patent: 4663662 (1987-05-01), Sekizawa et al.
patent: 4682216 (1987-07-01), Sasaki et al.
patent: 4700399 (1987-10-01), Yoshida
patent: 4724477 (1988-02-01), Ellis et al.
patent: 4742400 (1988-05-01), Tsuji
patent: 4878125 (1989-10-01), Katayama et al.

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