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Method-for-tone-reproduction-in-image-forming-system

Television receiver including a teletext decorder

A particular object of the invention is to provide a teletext decoder circuit which does not ...

Receiver for television and teletext signals, including a teletext decoder and an adaptive waiting time reduction circuit

What is claimed is: 1. A receiver for television and teletext signals, comprising: an operating ...

Zero crossing detector arrangements

What is claimed is: 1. A zero crossing detector arrangement which is operable on digitized ...

Phase comparator using digital and analogue phase detectors

I claim: 1. A phase detector comprising: a digital phase detector circuit responsive to a first ...

Teletext decoder apparatus including feature of inhibiting generation of an end-of-page signal

What is claimed is: 1. A teletext decoder comprising: means for detecting the page header of a ...

Ideographic teletext transmissions

It is an object of the present invention to provide an ideographic teletext transmission which ...

Combination TV receiver and teletext processor with on-screen message capability

It is an object of the invention to enable the insertion and deletion of on-screen display messages ...

Solid state imaging apparatus and method with expanded dynamic range

What is claimed is: 1. Solid state imaging apparatus comprising: a charge-coupled frame transfer ...

Video system with television receiver and teletext processor capable of switching external RGB signals

What is claimed is: 1. In combination in a video system including a television receiver, control ...

Anti-theft device for hoisting or striking a flag or the like

The present invention relates to a device for automatically hoisting or striking a flag, a pennant, ...

Method for tone reproduction in image forming system

Details

Inventors: Uchiyama, Tadamitsu; Iida, Tetsuya;
Assignee: Minolta Camera Kabushiki Kaisha (Osaka, JP)
Primary Examiner: Walberg; Teresa J.
Assistant Examiner: Rogers; Scott A.
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis

A method for reproduction of a multi-tone color image by combination of chromatic inks of cyan, magenta and yellow together with an achromatic ink of black. In the region of lower tone levels than a prescribed value, the image is formed by the complete under color removal, namely, by the sole use of the achromatic ink. In the region of higher tone levels than the prescribed value, the reproduction of the image is attained by performing the under color removal at a ratio of decrease relative to the rise of the tone levels, namely by causing the chromatic inks to overlap the achromatic ink.

DETAILED DESCRIPTION This invention, conceived in the urge to eliminate the unsatisfactory state of the prior art mentioned above, aims to provide a method for the tone reproduction which, in the reproduction of a color image with a color image forming system such as, an ink jet recording system, enables the color image to be reproduced with multiple tones without inducing the misregistration and reducing the density of the complete black.

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