Color Filter Array Interpolation for Edge Strength Filters

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2013 by IJETT Journal
Volume-4 Issue-7                      
Year of Publication : 2013
Authors : L.Naveen , B.Shobanbabu

MLA 

L.Naveen , B.Shobanbabu. "Color Filter Array Interpolation for Edge Strength Filters". International Journal of Engineering Trends and Technology (IJETT). V4(7):2774-2778 Jul 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.

Abstract

Basically we use beam splitters to capture data or image. Using beam splitters is very expensive, so inorder to overcome this we go for an alternative technique called color filters arrays. As a result of this, only one of the required three color samples becomes available at each pixel location and the other two need to be interpolated. This process is called Color Filter Array (CFA) interpolation or demosaicing. Many demosaicing algorithms have been introduced over the years to improve subjective and obj ective interpolation quality. We propose an orientation - free edge strength filter and apply it to the demosaicing problem. Edge strength filter output is utilized both to improve the initial green channel interpolation and to apply the constant color diffe rence rule adaptively. This simple edge directed method yields visually pleasing results with high CPSNR

References

[1] B. E. Bayer, “Color Imaging Array,” U.S. 3 971 065 , Jul. 1976.
[2] R. Kimmel, “Demosaicing: Image reconstruction from color CCDsamples,” IEEE Trans. Image Process. , vol. 8, no. 9 , pp. 1221 – 1228, Sep. 1999.
[3] R. Lukac and K. N. Plataniotis, “A normalized model for color - ratio based demosaicking schemes,” in Int. Conf. on Image Process. , 2004, vol. 3 , pp. 1657 – 1660.
[4] J. F. Hamilton and J. E. Adams, “Adaptive color plan interpolation in single sensor color electronic camera,” U.S. Patent 5 629 734, Mar. 13, 1997.
[5] C. A. Laroche and M. A. Prescott, “Apparatus and method for adaptively interpolating a full color image utilizing chrominance gradients,” U.S. Patent 5 373 322, Dec. 13, 1994.
[6] J. W. Glotzbach, R. W. Schafer, and K. Illgner, “A method of color filter array interpolation with alias cancellation properties,” in Proc. IEEE Int. Conf. Image Process. , 2001, vol. 1 , pp. 141 – 144.
[7] B. K. Gunturk, Y. Altunbasak, an d R. M. Mersereau, “Color plane interpolation using alternating projections,” IEEE Trans. Image Process. , vol. 11, no. 9 , pp. 997 – 1013, Sep. 2002.
[8] N. - X. Lian, L. Chang, Y. - P. Tan, and V. Zagorodnov, “Adaptive filtering for color filter array demosaicking,” IEEE Trans. Image Process. , vol. 16, no. 10 , pp. 2515 – 2525, Oct. 2007.
[9] R. H. Hibbard, “Apparatus and method for adaptively interpolating a full color image utilizing luminance gradients,” U.S. Patent 5 382 976, Jan. 17, 1995.
[10] J. E. Adams and J. F. Hamilton, Jr., “Adaptive color plan interpolation in single sensor color electronic camera,” U.S. Patent 5 506 619, Apr. 9, 1996.
[11] K. - H. Chung and Y. - H. Chan, “Color demosaicing using variance of color differences,” IEEE Trans. Image Process. , vol. 15, no. 10 , pp. 2944 2955, Oct. 2006.
[12] L. Zhang and X. Wu, “Color demo saicking via directional linear minimum mean square - error estimation,” IEEE Trans. Image Process. , vol. 14, no. 12 , pp. 2167 – 2178, Dec. 2005.
[13] D. Paliy, V. Katkovnik, R. Bilcu, S. Alenius, and K. Egiazarian, “Spatially adaptive color filter array interpolation for noiseless annoisy data,” Int. J. Imag. Syst. Technol. , vol. 17, no. 3 , pp. 105 – 122, 2007.
[14] X. Li, B. Guntu rk, and L. Zhang, “Image demosaicing: A systematic survey,” Proc. SPIE – Int. Soc. Opt. Eng. , vol. 6822 , p. 68221J - 1 - 15, Jan. 2008.
[15] K. Hirakawa and T. W. Parks, “Adaptive homogeneity - directed demosaicing algorithm,” IEEE Trans. Image Process. , vol. 14, no. 3 , pp. 360 – 369, Mar. 2005.
[16] D. Menon, S. Andriani, and G. Calvagno, “Demosaicing with directional filtering and a posteriori decision,” IEEE Trans. Image Process. , vol. 16, no. 1 , pp. 132 – 141, Jan. 2007.
[17] D. Menon and G. Calvagno, “Regularization approaches to demosaicking,” IEEE Trans. Image Process. , vol. 18, no. 10 , pp. 2209 – 2220, Oct. 2009.
[18] I. Pekkucuksen and Y. Altunbasak, “Gradient based threshold free color filter array interpolation,” in Proc. IEEE Int. Conf. Image Process. , Sep. 2010, pp. 137 – 140.
[19] K. H. Chung and Y. H. Chan, “Low - complexity color demosaicing algorithm based on integrated gradients,” J. Electron. Imag. , vol. 19, no. 2 , p. 021104 - 1 - 15, Jun. 2010

Keywords
Color filter array (CFA) interpolation, demosaicing, edge directed interpolation, orientation - free edge filter.