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http://dx.doi.org/10.5370/KIEE.2014.63.10.1434

Demosaicking of Hexagonally-Structured Bayer Color Filter Array  

Lee, Kyungme (Dept. of Media Software, SangMyung University)
Yoo, Hoon (Dept. of Media Software, SangMyung University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.63, no.10, 2014 , pp. 1434-1440 More about this Journal
Abstract
This paper describes a demosaicking method for hexagonally-structured color filter array. Demosaicking is essential to acquire color images using color filter array (CFA) in single sensor imaging. Thus, CFA patterns have been discussed in order to improve image quality in single sensor imaging after the Bayer pattern are introduced. Advancements in imaging sensor technology recently introduce a hexagonal CFA pattern. The hexagonal CFA can be considered to be a 45-degree rotational version of the Bayer pattern, thus demosaicking can be implemented by an existing method with backward and forward 45-degree rotations. However, this approach requires heavy computing power and memory in image sensing devices because of the image rotations. To overcome this problem, we proposes a demosaicking method for a hexagonal Bayer CFA without rotations. In addition, we introduce a weighting parameter in our demosaicking method to improve image quality and to unifying exiting method with our method. Experimental results indicate that the proposed method is superior to conventional methods in terms of PSNR. In addition, some optimized values for the weighting parameter are provided experimentally.
Keywords
Demosaicking; Hexagonal sensor; Bayer color filter array; Interpolation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 H. Yoo, "Analysis on the new McMaster image dataset to develop demosaicking techniques," Journal of Korea Institute of Information and Communicate Engineering, vol. 16, no. 2, pp. 344-349, 2012.   과학기술학회마을   DOI   ScienceOn
2 T. Yamada, K. Ikeda, Y. G. Kim, and H. Wakoh, "A progressive scan ccd image sensor for dsc applications," IEEE Journal Solid-State Circuits, vol. 35, no.12, pp. 2044-2054, 2000.   DOI   ScienceOn
3 T. Kuno and H. Sugiura, "Imaging apparatus and mobile terminal incorporating same," US patent 0081132, 2003.
4 T. Takayaman, "Linear image sensor," US patent 5956087, 1999.
5 O. Losson, L. Macaire, Y. Yang, Advances in Imaging and Electron Physics, Elsevier, vol. 162, pp. 173-265, 2010.
6 Y.-K. Lee, H. Yoo, "Demosaicking method using high-order Interpolation with parameters," The transactions of the Korea Institute of Electrical Engineers, vol. 62, no. 9, pp. 1276-1282, 2013.   과학기술학회마을   DOI   ScienceOn
7 H. Yoo, D. Yoon, and D. Kim "Decimation-interpolation structures for image communications and improvement using the lifting scheme," IEEE Trans. Consumer Electronics, vol. 56, no. 4, pp. 2669-2677, Nov. 2010.   DOI   ScienceOn
8 B.-D. Choi and H. Yoo, "Design of piecewise weighted linear interpolation based on even-odd decomposition and its application to image resizing," IEEE Trans. Consumer Electronics, vol. 55, no. 4, pp. 2280-2286, Nov. 2009.   DOI   ScienceOn
9 D.-H. Shin and H. Yoo, "Computational integral imaging reconstruction method of 3D images using pixel-to-pixel mapping and image interpolation," Elsevier Optics Communications, vol. 282, no. 14, pp. 2760-2767, 15 July 2009.   DOI   ScienceOn
10 H. Yoo and D.-H. Shin, "Image quality enhancement in 3D computational integral imaging by use of interpolation methods," OSA Optics Express, vol. 15, no. 19, pp. 12039-12049, Sep. 2007.   DOI
11 J. S. Jimmy Li and S. Randhawa, "Color filter array demosaicking using high-order interpolation techniques with a weighted median filter for sharp color edge preservation," IEEE Transaction on Image Processing, vol. 18, no. 9, pp. 1946-1957, 2009.   DOI   ScienceOn
12 R. Lukac, Single-sensor imaging: methods and applications for digital cameras, CRC Press, 2009.
13 K.-H. Chung and Y.-H. Chan, "Color demosaicing using variance of color differences," IEEE Transaction on Image Processing, vol. 15, no. 10, pp.2944-2955, 2006.   DOI   ScienceOn
14 A. Buades, B. Coll, J.-M. Morel, and C. Sbert, "Self similarity driven demosaicking," IEEE Transaction on Image Processing, vol. 18, no. 6, pp.1192-1202, 2009.   DOI   ScienceOn
15 E. Dubois, "Frequency-domain methods for demosaicking of bayer-sampled color images," IEEE Signal Processing Letters, vol. 12, pp. 847-850, 2005.   DOI   ScienceOn
16 B. E. Bayer, "Color imaginig array," US patent 3971065, 1975.