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Optical Scanning of Continuous Tone and Line Documents with Spatial Frequency Separation for Improved Data Handling and Compaction

IP.com Disclosure Number: IPCOM000069644D
Original Publication Date: 1978-May-01
Included in the Prior Art Database: 2005-Feb-21

Publishing Venue

IBM

Related People

Authors:
Schindler, HR Soo, SS White, JM [+details]

Abstract

The described scanning system provides separation of high and low spatial frequency components of image with binarization algorithms to utilize such separated information to define high-contrast sharp edges filled in with low resolution pseudo-halftone gray scale information. High and/or low frequency components may then be readily selected for facsimile transmission and/or data compaction. Compaction of separated data may be more effective than of combined data.