IMAGE ENHANCEMENT BY MULTIPLE, ANGLED SEQUENTIAL EXPOSURES
Original Publication Date: 1981-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In order to extend the brightness range of a high contrast process such as xerography, it is known to use halftone imaging techniques in which a continuous tone original is imaged twice, first to the original directly, then through a halftone line screen. Such techniques are known as sequential (SQ) halftoning exposures. It is also known that this method is limited in its effort since both high and low densities of the original cannot be reproduced with good fidelity.