Local adaptive directional color filter array interpolation based on inter-channel correlation

被引：3
|
作者：
Chen, Xiangdong [1 ]
He, Liwen [1 ]
Jeon, Gwanggil [2 ]
Jeong, Jechang [3 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Coll Comp Sci & Technol, Nanjing 210003, Jiangsu, Peoples R China
[2] Incheon Natl Univ, Dept Embedded Syst Engn, Inchon 406772, South Korea
[3] Hanyang Univ, Dept Elect & Comp Engn, Seoul 133791, South Korea
来源：
OPTICS COMMUNICATIONS | 2014年 / 324卷
关键词：
Color filter array (CFA) interpolation; Demosaicking; Directional interpolation; Color difference; Bayer color filter array; DEMOSAICKING; ALGORITHM; RESTORATION;
D O I：
10.1016/j.optcom.2014.03.019
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we present a novel color image demosaicking algorithm. The algorithm consists of two steps: an interpolation step and a refinement step. The missing green color information is first interpolated by using the color channel difference. In the refinement step, a local weighted directional interpolation method guided by the pre-interpolated green channel is applied to refine the interpolation results along the determined interpolation direction. Lastly, post-processing is implemented to output the final demosaicked full color image. Due to well estimating the interpolation directions based on reliable inter-channel correlation, the interpolation accuracy is guaranteed, besides, an effective post-processing was implemented to reduce the interpolation artifacts. As a result, compared with the latest demosaicking algorithms, experiments showed that the proposed method provides superior performance in terms of both objective and subjective image qualities. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：269 / 276
页数：8
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