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Printing Apparatus Modified to Correct for Non-Ideal Inks

IP.com Disclosure Number: IPCOM000056296D
Original Publication Date: 1980-Nov-01
Included in the Prior Art Database: 2005-Feb-14

Publishing Venue

IBM

Related People

Authors:
Melz, PJ [+details]

Abstract

This article relates to digital color reproduction which is characterized by scanning the color information source and transforming the scanned information into a form which controls a reproduction (color printing) process. Color sources are usually scanned by partitioning the colors into primary components, i.e., red, green, and blue, and signal processing the components in parallel paths. Each scanned component is thresholded to control a binary printer for one of the three primary subtractive colors, cyan, magenta and yellow. To compensate for grey-scale error made by the binary printer, the error is fed back, spatially distributed by an appropriate filter and combined with new scanned information.