Half-tone image reproducing method of improving gradation withou

Details Half-tone image reproducing method of improving gradation withou Half-tone image reproducing method of improving gradation withou

1989-03-10

1990-11-13

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, 358457, H04N 146

Patent

active

049705865

ABSTRACT:
Input data on a colored or monochromatic image having a gradation are recorded on a light transmissive sheet to prepare mask originals. The data on the colored image are separated into data corresponding to red, green and blue color components and the data on each of the color components are converted to dither data. At least two mask originals are prepared for each color on the basis of the dither data associated with the color. Photosensitive pressure-sensitive recording paper coated with microcapsules each encapsulating a chromogenic material is exposed to light through the mask originals and is then subjected to development under pressure, whereby the image is reproduced thereon. The mask originals carry at least two different patterns of image data for each color.

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patent: 4663662 (1987-05-01), Sekizawa
patent: 4710822 (1987-12-01), Matsunawa
patent: 4730185 (1988-03-01), Springer
patent: 4758897 (1988-07-01), Hiratsuka
patent: 4809063 (1989-02-01), Moriguchi et al.
patent: 4810614 (1989-03-01), Sangyoji et al.
patent: 4864326 (1989-09-01), Kawamura et al.
patent: 4875073 (1989-10-01), Ueda et al.
patent: 4875074 (1989-10-01), Sangyoji et al.

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