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Volume: 24 | Article ID: art00052
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Random Color Filter Arrays are Better than Regular Ones
  DOI :  10.2352/ISSN.2169-2629.2017.32.294  Published OnlineNovember 2016
Abstract

Most of digital cameras today use a color filter array (CFA) and a single sensor to acquire color information of the scene. In this article, we ask which arrangement of colors in the mosaic of the CFA provides the best encoding of the scene. As a solution of the inverse problem of demosaicing, we consider a linear minimum mean squared error model. We used redundancy given by the neighborhood on the sampled image to ensure the stability of the solution. For some CFAs, LMMSE with neighborhood provides equivalent reconstruction results and less variability among the image content compared to edge-directed demosaicing on the Bayer. LMMSE allows comparing CFAs of regular pattern with random ones. We show that mosaics with random arrangement of colors and quasi equal proportion of RGB provide best reconstruction performance.

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Prakhar Amba, Jérôme Dias, David Alleysson, "Random Color Filter Arrays are Better than Regular Onesin Proc. IS&T 24th Color and Imaging Conf. ,  2016,  https://doi.org/10.2352/ISSN.2169-2629.2017.32.294

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Copyright © Society for Imaging Science and Technology 2016
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Color and Imaging Conference
color imaging conf
2166-9635
Society for Imaging Science and Technology