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Proceedings Paper

Scanner motion error detection and correction
Author(s): Chengwu Cui
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Paper Abstract

By design, a typical desktop scanner scans a document, line by line. Therefore, in addition to scanner lens distortion, motion distortion can also be a problem if not controlled well. In particular, when a paper document is fed via an automatic document feeder at high speed, such motion errors can be large and may cause unpleasant visible artifacts in the form of jaggy oblique edges, uneven compressed horizontal lines, unpleasant moire patterns, local color misregistration, and etc. In this paper, we report a method to measure and characterize scanner motion errors. Motion errors are categorized into two types: slow drift errors and sudden change errors. We attempt to investigate their respective impact on perceived image quality. We further report the principle and method to correct such errors via software.

Paper Details

Date Published: 29 January 2007
PDF: 6 pages
Proc. SPIE 6494, Image Quality and System Performance IV, 64940R (29 January 2007); doi: 10.1117/12.703613
Show Author Affiliations
Chengwu Cui, Lexmark International Inc. (United States)

Published in SPIE Proceedings Vol. 6494:
Image Quality and System Performance IV
Luke C. Cui; Yoichi Miyake, Editor(s)

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