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http://dx.doi.org/10.5573/ieie.2016.53.12.105

Color Image Restoration in Detected Aliasing Region  

Kwon, Ji Yong (Department of Electrical and Electronic Engineering, Yonsei University)
Kang, Moon Gi (Department of Electrical and Electronic Engineering, Yonsei University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.12, 2016 , pp. 105-110 More about this Journal
Abstract
To reduce the cost and volume of a digital camera, a subsampled color filter array(CFA) image is used and demosaicking is applied to estimate the missing color values. However, aliasing, the overlaps of signals in the frequency domain, occurs when signals are subsampled. This causes aliasing artifacts such as false colors and zipper effects in demosaicking processes. In this paper, the algorithm estimating high-quality color images by removing aliasing artifacts in them is proposed. The aliasing region map is estimated using the sub-sampled signals of the CFA image. By using the aliasing region map and the estimated luminance image, the least squares problem of the observation models is designed and aliasing artifacts are eliminated. The experiments demonstrate that the proposed algorithm restores color images without aliasing artifacts.
Keywords
에일리어싱;에일리어싱 아티팩트;컬러 영상 복원;컬러 보간;
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Times Cited By KSCI : 1  (Citation Analysis)
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