Abstract
High resolution images obtained from single image super resolution often suffer from excessive smoothness which blurs edges and gives smooth areas an un-natural texture. This paper proposes a super resolution method that combines wavelet super resolution and an edge enhancing back-projection filter to produce a super resolution image with sharp edges and natural texture. The low resolution image is first up-sampled using the discrete wavelet transform. High frequency sub-bands are derived from DWT of a bicubic interpolated low resolution image. The up-sampled image is then subjected to iterative back projection using a back-projection filter based on the Laplacian of Gaussian. The proposed method is tested on RGB colour images. It is found to produce better results than bicubic interpolation and selected edge directed interpolation methods in terms of PSNR and SSIM. It is also found to approximate the edge sharpness of edge directed interpolation while giving a more natural texture in smooth areas. The proposed method also eliminates spurious colours that have been observed in most edge-directed methods.
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References
Thevenaz, P., Blu, T., Unser, M.: Image interpolation and resampling. In: Bankman, I. (ed.) Handbook of Medical Imaging, 2nd edn, pp. 465–494. Elsevier/Academic Press, San Diego (2009)
Bagawade, R.P., Bhagawat, K.S., Patil, P.M.: Wavelet transfrom techniques for image resolution enhancement: a study. Int. J. Emerg. Technol. Adv. Eng. 2(4), 167–172 (2012)
Tai, S.-C., Kuo, T.-M., Iao, C.-H., Liao, T.-W.: A fast algorithm for single image super resolution in both wavelet and spatial domain. In: International Symposium on Computer, Consumer and Control, Taichung, Taiwan (2012)
Garg, A., Naidu, S.V., Yahia, H., Singh, D.: Wavelet based resolution enhancement for low resolution satellite images. In: 9th International Conference on Industrial and Information Systems (ICIIS), Gwalior, India (2014)
Ngocho, B.M., Mwangi, E.: Single image super resolution with improved wavelet interpolation and iterative back-projection. IOSR J. VLSI Signal Process. 5(6), 16–24 (2015)
Irani, M., Peleg, S.: Motion analysis for image enhancement: resolution, occlusion and transparency. J. Vis. Commun. Image Represent. 4(4), 324–335 (1993)
Dai, S., Han, M., Wu, Y., Gong, Y.: Bilateral back-projection for single image super resolution. In: IEEE International Conference on Multimedia and Expo, Beijing, July 2007
Wang, J.-T., Liang, K.-W., Chang, S.-F., Chang, P.-C.: Super-resolution image with estimated high frequency compensated algorithm. In: 9th International Symposium on Communications and Information, Icheon, South Korea, 28–30 September 2009
Makwana, R.R., Mehta, N.D.: Single image super-resolution VIA iterative back projection based Canny edge detection and a Gabor filter prior. Int. J. Soft Comput. Eng. 3(1), 2231–2307 (2013)
Bareja, M.N., Modi, C.K.: An improved iterative back projection based single image super resolution approach. Int. J. Image Graph. 14(4), 1450015 (2014)
Gonzalez, R.C., Woods, R.E.: Digital Image Processing, 3rd edn. Prentice-Hall, Upper Saddle River (2008)
Gunn, S.R.: On the discrete representation of the Laplacian of Gaussian. Pattern Recogn. 32(8), 1463–1472 (1999)
Agrawal, M., Konolige, K., Blas, M.R.: CenSurE: center surround extremas for realtime feature detection and matching. In: Forsyth, D., Torr, P., Zisserman, A. (eds.) ECCV 2008. LNCS, vol. 5305, pp. 102–115. Springer, Heidelberg (2008). doi:10.1007/978-3-540-88693-8_8
Laguna, R., Barrientos, R., Blazquez, L.F., Miguel, L.J.: Traffic sign recognition application based on image processing techniques. In: 19th Word Congress: The International Federation of Automatic Control, Cape Town, South Africa (2014)
Franzen, R.: Kodak lossless true color image suite. Eastman Kodak, 27 January 2013. http://r0k.us/graphics/kodak/
University of Southern California, Signal and Image Processing Institute. The USC-SIPI Image Database: Version 5, April 2006. http://sipi.usc.edu/database/database.php?volume=aerial
Li, X., Orchard, M.T.: New edge directed interpolation. IEEE Trans. Image Process. 10(10), 1521–1527 (2001)
Zhang, L., Wu, X.: An edge-guided image interpolation algorithm via directional filtering and data fusion. IEEE Trans. Image Process. 15(3), 2226–2238 (2006)
Ngocho, B.M.: Single image super resolution using the wavelet transform and an iterative back-projection technique. Unpublished: M.S. thesis. School of Engineering, University of Nairobi (2016)
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Ngocho, B.M., Mwangi, E. (2017). An Iterative Back-Projection Technique for Single Image Super Resolution with Natural Texture Preservation. In: Fleming, P., Vyas, N., Sanei, S., Deb, K. (eds) Emerging Trends in Electrical, Electronic and Communications Engineering. ELECOM 2016. Lecture Notes in Electrical Engineering, vol 416. Springer, Cham. https://doi.org/10.1007/978-3-319-52171-8_18
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DOI: https://doi.org/10.1007/978-3-319-52171-8_18
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