Demosaicing based on the correlations between low-resolution images

Authors:
Hyun Mook Oh;Moon Gi Kang
Affiliations:
Yonsei University, Shinchon-Dong, Seodaemoon-Ku, Seoul, Korea;Yonsei University, Shinchon-Dong, Seodaemoon-Ku, Seoul, Korea
Venue:
SIP '07 Proceedings of the Ninth IASTED International Conference on Signal and Image Processing
Year:
2007

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Abstract

In this paper, an edge directed demosaicing method based on the correlation between low-resolution images is proposed. A masaiced image from a Bayer pattern is regarded as combination of four up-sampled low-resolution images. In the beginning of the interpolation of each channel, the images are pre-interpolated toward the horizontal and vertical direction. The variances on the directionally interpolated image and on the difference domain is calculated based on the within- and cross-channel channel correlation. The missing values of each image is determined by using the variances. In the experimental results, proposed method shows improved result in the subjective and objective criterions.