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Saturation Compensating Method by Embedding Pseudo-Random Code in Wavelet Packet Based Colorization  

Ko, Kyung-Woo (School of Electrical Engineering and Computer Science, Kyungpook National University)
Jang, In-Su (School of Electrical Engineering and Computer Science, Kyungpook National University)
Kyung, Wang-Jun (School of Electrical Engineering and Computer Science, Kyungpook National University)
Ha, Yeong-Ho (School of Electrical Engineering and Computer Science, Kyungpook National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.47, no.4, 2010 , pp. 20-27 More about this Journal
Abstract
This paper proposes a saturation compensating method by embedding pseudo-random code information in wavelet packet based colorization algorithm. In the color-to-gray process, an input RGB image is converted into YCbCr images, and a 2-level wavelet packet transform is applied to the Y image. And then, color components of CbCr are embedded into two sub-bands including minimum amount of energy on the Y image. At this time, in order to compensate the color saturations of the recovered color image during the printing and scanning process, the maximum and minimum values of CbCr components of an original image are also embedded into the diagonal-diagonal sub-band by a form of pseudo-random code. This pseudo-random code has the maximum and minimum values of an original CbCr components, and is expressed by the number of white pixels. In the gray-to-color process, saturations of the recovered color image are compensated using the ratio of the original CbCr values to the extracted CbCr values. Through the experiments, we can confirm that the proposed method improves color saturations in the recovered color images by the comparison of color difference and PSNR values.
Keywords
Colorization; WPT(wavelet packet transform); saturation; pseudo-random code;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 고경우, 권오설, 손창환, 하영호, "웨이블릿 패킷변환을 이용한 흑백 영상의 칼라화 알고리즘," 전자공학회논문지, 제45권 SP편, 제1호, 1-10쪽, 2008 년 3월   과학기술학회마을
2 K. W. Ko, O. S. Kwon, C. H. Son, and Y. H. Ha, "Color embedding and recovery based on wavelet packet transform," Journal of Imaging Science and Technology, vol. 52, no. 1, pp. 010501-1-010501-10, Jan./Feb. 2008.   DOI   ScienceOn
3 M. Chaumont and W. Puech, "A color image hidden in a gray-level image," CGIV 2006 Final Program and Proceedings, pp. 226-231, June 2006.
4 N. Ohta and A. R. Robertson, Colorimetry fundamentals and applications, John Wiley and Sons Ltd. 2005.
5 R. Neelamani, R. de Queiroz, Z. Fan, S. Dash, and R. Baraniuk, "JPEG compression history estimation for color images," IEEE Transactions of Image Processing, vol. 15, no. 6, pp. 1365-1378, June 2006.   DOI
6 W. B. Pennebaker and J. L. Mitchell, JPEG still image data compression standard, Van Nostrand Reinhold, 1993.
7 K. M. Braun and R. L. Queiroz, "Color to gray and back: Color embedding into textured gray images," Proceedings of IS&T/SID 13th Color Imaging Conference, pp. 120-124, Nov. 2005.
8 R. L. de Queiroz and K. M. Braun, "Color to gray and back: Color embedding into textured gray images," IEEE Transactions on Image Processing, vol. 15, no. 6, pp. 1464-1470, June 2006.   DOI