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Image Enhancement using E-spline Functions

Research Authors
M. F. Fahmy, G. Fahmy and O. F. Fahmy
Research Department
Research Year
2013
Research Journal
IEEE International Symposium for Signal Processing and Information Technology, Athens, Dec, 2013
Research Publisher
NULL
Research Vol
NULL
Research Rank
3
Research_Pages
NULL
Research Website
NULL
Research Abstract

Exponential spline polynomials (E-splines) represent
the best smooth transition between continuous and discrete domains. As they are constructed from convolution of exponential segments, there are many degrees of freedom to optimally choose the most convenient E-spline, suitable for a specific application. In this paper, the parameters of these Esplines were optimally chosen, to enhance the performance of image de-noising as well as image zooming schemes. The proposed technique is based on minimizing the total variation function of the detail coefficients of the E-spline based wavelet decomposition. In image de-noising schemes, apart from Espline parameter estimations, the thresholding levels of their detail coefficients, are also optimally chosen. In zooming applications, the quality of interpolated images are further
improved and sharpened by applying ICA technique to them, in order to remove any dependency. Illustrative examples are given to verify image enhancement of the proposed e-spline scheme, when compared with the existing approaches.