Application of a 3-CCD color camera for colorimetric and densitometric measurements

David Brydges; Freddy Deppner; Hansjoerg Kuenzli; Karl Heuberger; Roger David Hersch

doi:10.1117/12.298292

2 January 1998 Application of a 3-CCD color camera for colorimetric and densitometric measurements

David Brydges, Freddy Deppner, Hansjoerg Kuenzli, Karl Heuberger, Roger David Hersch

Proceedings Volume 3300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III; (1998) https://doi.org/10.1117/12.298292
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

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.

Citation Download Citation

David Brydges, Freddy Deppner, Hansjoerg Kuenzli, Karl Heuberger, and Roger David Hersch "Application of a 3-CCD color camera for colorimetric and densitometric measurements", Proc. SPIE 3300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III, (2 January 1998); https://doi.org/10.1117/12.298292

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