Color Interpolation Algorithm for the Sony-RGBW Color Filter Array
Recently, a CFA sensor including a W channel has been developed. Since the W channel receives brightness information, it has a broad spectrum band compared to primary colors (Red, Green, Blue) and exhibits a high SNR. A camera using the CFA sensor obtains only certain type of color information for e...
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| Published in: | Electronic Imaging Vol. 30; no. 13; pp. 439-1 - 439-4 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Society for Imaging Science and Technology
28.01.2018
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| Subjects: | |
| ISSN: | 2470-1173, 2470-1173 |
| Online Access: | Get full text |
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| Summary: | Recently, a CFA sensor including a W channel has been developed. Since the W channel receives brightness information, it has a broad spectrum band compared to primary colors (Red, Green, Blue) and exhibits a high SNR. A camera using the CFA sensor obtains only certain type of color
information for each pixel, so a color interpolation method is used to restore the full resolution image. In this paper, we propose a new color interpolation method for Sony-RGBW CFA. The proposed method is edge-adaptive and preferentially restores the W channel with a high sampling rate.
In the next step, the R, G, and B channels are restored in the color difference domain using the W channel with the full resolution. Experimental results showed that the reconstructed image obtained by applying the proposed algorithm to the Sony-RGBW is superior to the image restored by conventional method in terms of SNR and visual confirmation. |
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| Bibliography: | 2470-1173(20180128)2018:13L.4391;1- |
| ISSN: | 2470-1173 2470-1173 |
| DOI: | 10.2352/ISSN.2470-1173.2018.13.IPAS-439 |