Local adaptive directional color filter array interpolation based on inter-channel correlation
- Authors
- Chen, Xiangdong; He, Liwen; Jeon, Gwanggil; Jeong, Jechang
- Issue Date
- Aug-2014
- Publisher
- ELSEVIER
- Keywords
- Color filter array (CFA) interpolation; Demosaicking; Directional interpolation; Color difference; Bayer color filter array
- Citation
- OPTICS COMMUNICATIONS, v.324, pp.269 - 276
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICS COMMUNICATIONS
- Volume
- 324
- Start Page
- 269
- End Page
- 276
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/159439
- DOI
- 10.1016/j.optcom.2014.03.019
- ISSN
- 0030-4018
- Abstract
- 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.
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