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Volume: 32 | Article ID: art00013
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Color Interpolation Algorithm for a Periodic White-Dominant RGBW Color Filter Array
  DOI :  10.2352/ISSN.2470-1173.2020.10.IPAS-134  Published OnlineJanuary 2020
Abstract

Recently, CFA sensors including the W channel have been developed. Since the W channel receives luminance information, the W channel has a wider spectrum band than that of the R, G, and B channels. Therefore, the W channel can get higher SNR than that of the R, G, and B channels. There are many color interpolation methods for the Bayer CFA, but less for the RGBW CFA. In this paper, we propose a new color interpolation method for white-dominant RGBW CFA. The proposed method is edgeadaptive. Its method reconstruct the W channel first which has a high sampling rate. Next, the R, G, and B channels are reconstructed by using the color difference domains with theWchannel. Experimental results show that the PSNR and visual confirmation are higher than the conventional method.

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Kyeonghoon Jeong, Jonghyun Kim, Moon Gi Kang, "Color Interpolation Algorithm for a Periodic White-Dominant RGBW Color Filter Arrayin Proc. IS&T Int’l. Symp. on Electronic Imaging: Image Processing: Algorithms and Systems XVIII,  2020,  pp 134-1 - 134-5,  https://doi.org/10.2352/ISSN.2470-1173.2020.10.IPAS-134

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