Method and system for achieving enhanced gray levels in a screen

Details Method and system for achieving enhanced gray levels in a screen Method and system for achieving enhanced gray levels in a screen

1998-08-31

2000-04-11

Popovici, Dov

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 12, G06F 1500

Patent

active

06049395&

ABSTRACT:
A method and system for digitally reproducing an image on a printing plate that includes enhancing gray levels so that plate may be imaged at lower resolutions and therefore higher speed. An image is scanned and a two dimensional array of optical density values. A comparison is made with a screen cell array having a repetitive pattern of a plurality of different screen cells. Each screen cells includes screen comparison values which when arranged in a sequence of increasing values are interleaved with values in a similarly arranged sequence of values from one of the different screen cells of the screen cell array. Pixel comparisons generate a binary value which is used to selectively operate a laser beam to expose microdots on a printing plate.

REFERENCES:
patent: 5187594 (1993-02-01), Deutsch et al.
patent: 5274473 (1993-12-01), Kidd et al.

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