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OPTICAL HALFTONING OF SCANNED IMAGES

IP.com Disclosure Number: IPCOM000025193D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

Scanned input images may be optically halftoned prior to photodetection and the required modulation achieved by one of the following techniques: by control of the power source for an illuminator; by control of the light between the illumination source and an associated sensor; or by the addition of a secondary light source into the photodetector.