Back to articles
Articles
Volume: 18 | Article ID: art00047_1
Image
Scanner-based Measurement of Print Line Placement
  DOI :  10.2352/ISSN.2169-4451.2002.18.1.art00047_1  Published OnlineJanuary 2002
Abstract

Exact placement of print lines is extremely important to reduce density banding and color misregistration in a high-speed thermal tandem printer that employs separate print stations for each color. We propose a flatbed scanner method for precisely estimating the errors of line placement and print velocity. Our approach uses a model for the scanned data that translates line placement errors into phase variations. A classical phase estimation algorithm is then employed to robustly estimate the line placement error in the presence of print artifacts such as noise and thermal history effects. The optical distortion of the flatbed scanner is measured and the spatial frequency bands that contain large scanner errors are excluded from the analysis of the printer. We present examples that show the usefulness of this method in identifying problems in printer transport systems, and in verifying the effectiveness of solutions to these problems.

Subject Areas :
Views 4
Downloads 0
 articleview.views 4
 articleview.downloads 0
  Cite this article 

Suhail S. Saquib, Dirk W. Hertel, James W. Slack, Brian Busch, Richard G. Egan, "Scanner-based Measurement of Print Line Placementin Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP18),  2002,  pp 195 - 199,  https://doi.org/10.2352/ISSN.2169-4451.2002.18.1.art00047_1

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2002
72010410
NIP & Digital Fabrication Conference
nip digi fabric conf
2169-4451
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA