4 February 2013 Color reproductivity improvement with additional virtual color filters for WRGB image sensor
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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.
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Shun Kawada, Shun Kawada, Rihito Kuroda, Rihito Kuroda, Shigetoshi Sugawa, Shigetoshi Sugawa, } "Color reproductivity improvement with additional virtual color filters for WRGB image sensor", Proc. SPIE 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications, 865205 (4 February 2013); doi: 10.1117/12.2003320; https://doi.org/10.1117/12.2003320
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