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Proceedings Paper

Color reproductivity improvement with additional virtual color filters for WRGB image sensor
Author(s): Shun Kawada; Rihito Kuroda; Shigetoshi Sugawa
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Paper Abstract

We have developed a high accuracy color reproduction method based on an estimated spectral reflectance of objects using additional virtual color filters for a wide dynamic range WRGB color filter CMOS image sensor. The four virtual color filters are created by multiplying the spectral sensitivity of White pixel by gauss functions which have different central wave length and standard deviation, and the virtual sensor outputs of those virtual filters are estimated from the four real output signals of the WRGB image sensor. The accuracy of color reproduction was evaluated with a Macbeth Color Checker (MCC), and the averaged value of the color difference ΔEab of 24 colors was 1.88 with our approach.

Paper Details

Date Published: 4 February 2013
PDF: 7 pages
Proc. SPIE 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications, 865205 (4 February 2013); doi: 10.1117/12.2003320
Show Author Affiliations
Shun Kawada, Tohoku Univ. (Japan)
Rihito Kuroda, Tohoku Univ. (Japan)
Shigetoshi Sugawa, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 8652:
Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Alessandro Rizzi, Editor(s)

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