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Proceedings Paper

Application of a 3-CCD color camera for colorimetric and densitometric measurements
Author(s): David Brydges; Freddy Deppner; Hansjoerg Kuenzli; Karl Heuberger; Roger David Hersch
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Paper Abstract

Video cameras have been used in the graphic arts industry primarily for quality inspection applications where one is interested only in the macro or large scale appearance defects of the print i.e. acceptable/not acceptable. CCD video cameras also have the potential for use in on-press color-type measurements. The advantages of such measurements are numerous, most notably the ability to accurately determine what has been measured. However, despite the advantages current CCD cameras are not designed to measure colors directly. One of the major drawbacks to the use of standard 3- CCD cameras for such measurements is that the spectral response of the cameras differ from standard densitometric or colorimetric responses. Additionally, the dynamic range of the CCD camera is not suitable to accurately measure the densities attainable in high quality sheet-fed printing. This paper discusses techniques which have been used, and results obtained, in an attempt to acquire both densitometric and colorimetric measurements from a standard 8-bit 3-CCD camera for use in newspaper printing.

Paper Details

Date Published: 2 January 1998
PDF: 10 pages
Proc. SPIE 3300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III, (2 January 1998); doi: 10.1117/12.298292
Show Author Affiliations
David Brydges, Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Freddy Deppner, Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Hansjoerg Kuenzli, Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Karl Heuberger, Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Roger David Hersch, Swiss Federal Institute of Technology (Switzerland)


Published in SPIE Proceedings Vol. 3300:
Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III
Giordano B. Beretta; Reiner Eschbach, Editor(s)

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