Image processor and printing apparatus which perform binary codi

Details Image processor and printing apparatus which perform binary codi Image processor and printing apparatus which perform binary codi

1993-10-05

1996-04-16

Razavi, Michael T.

Image analysis

Color image processing

Color correction

382270, 358518, G06K 938

Patent

active

055090850

ABSTRACT:
An image processor and a color printing apparatus to which the image processor is applied, the image processor having the function of binary-coding color tone image data so that the image data can be output to apparatuses not having a pixel-based tone control system. The image processor includes a first-color-component binary-coding means for binary-coding a first color component, a second-color-component binary-coding means for binary-coding a second color component, a second-color-component threshold controlling means for the second-color-component binary-coding means, the second-color-component threshold controlling means increasing or decreasing a second-color-component binary-coding threshold in accordance with a binary-coded result OFF or ON of the first color component, a third-color-component binary-coding means for binary-coding a third color component, and a third-color-component threshold controlling means for the third-color-component binary-coding means, the third-color-component threshold controlling means increasing or decreasing a third-color-component binary-coding threshold by referring at least to the binary-coded result of the first color component or the binary-coded result of the second color component.

REFERENCES:
patent: 4783837 (1988-11-01), Kawamura et al.
patent: 5128748 (1992-07-01), Murakami et al.
patent: 5210602 (1993-05-01), Mintzer
patent: 5243443 (1993-09-01), Eschbach
Digital Techniques for Producing Under-Colored Halftone Images--T. M. Holladay Xerox Disclosure Journal, vol. 8, No. 6, Nov.-Dec., 1983, Stamford, Cn. p. 531.

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