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Proceedings Paper

A New Flatbed Color Scanner With Automatic Operation
Author(s): Makoto Hirosawa; Shinji Asada; Naokatsu Nishiguchi; Yoshihiro Kishida; Takashi Sakamoto; Noriyuki Shimano
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Paper Abstract

Color-separated samples of several originals by expert scanner operators were collected and studies were niade into the relevance with the cumulative density histogram (CDH) of the original in order to automate the work of setting up the scanning conditions at a color scanner for prepress which is used for reproducing high-quality color originals. From the scanning results, it was discovered that the highlight and shadow densities to be setup were closely related to the densities in the proximity of the minimum density (Dmin) and maximum density (Dmax) of the CDH, respectively, and that the characteristics of tone reproduction are dependant on the density range of the original. An automatic setup model based on this knowledge was established and experiments have been carried out using a newly developed color flatbed scanner. The experimental results based on the proposed model were satisfactory. The color flatbed scanner houses newly developed CCD sensors and optical system, and high-speed, high-quality processing has been enabled by digital circuits. An easier-to-operate scanner has been achieved through an automatic setup function and easy handling of originals.

Paper Details

Date Published: 12 June 1990
PDF: 9 pages
Proc. SPIE 1184, Neugebauer Memorial Seminar on Color Reproduction, (12 June 1990); doi: 10.1117/12.963905
Show Author Affiliations
Makoto Hirosawa, Dainippon Screen Mfg. Co., Ltd. (Japan)
Shinji Asada, Dainippon Screen Mfg. Co., Ltd. (Japan)
Naokatsu Nishiguchi, Dainippon Screen Mfg. Co., Ltd. (Japan)
Yoshihiro Kishida, Dainippon Screen Mfg. Co., Ltd. (Japan)
Takashi Sakamoto, Dainippon Screen Mfg. Co., Ltd. (Japan)
Noriyuki Shimano, Dainippon Screen Mfg. Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 1184:
Neugebauer Memorial Seminar on Color Reproduction
Kazuo Sayanagi, Editor(s)

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