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Proceedings Paper

Paired directional transform-based methods of image enhancement
Author(s): Fatma T. Arslan; Joann M. Moreno; Artyom M. Grigoryan
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Paper Abstract

In this paper, an effective realization of the α-rooting method of image enhancement by splitting-signals is proposed. The splitting-signals completely determine the image and split its spectrum by disjoint subsets of frequencies. Image enhancement is reduced to processing separate splitting-signals. We focus on processing only one specified splitting-signal, to achieve effective image enhancement that in many cases exceeds the enhancement by known a-rooting and wavelet methods. An effective realization of enhancement of image (N × N) is achieved by using one coefficient, instead of N/2 such coefficients for splitting-signals in the split α-rooting and N × N in traditional α-rooting. The proposed method does not require Fourier transforms, its realization is performed with N multiplications. The processing of the splitting-signal leads to the change of the image along the parallel lines by N different values, which leads to the concept of directional images and their application in enhancing the image along directions. A novel method of combining paired transform (pre-step of SMEME (spectral spatial maximum exclusive mean) filter) by wavelet transforms is proposed. While denoising directional clutters, the most corrupted splitting-signal is estimated and found, depending on the angle of long-waves.

Paper Details

Date Published: 12 May 2006
PDF: 12 pages
Proc. SPIE 6246, Visual Information Processing XV, 62460K (12 May 2006); doi: 10.1117/12.669674
Show Author Affiliations
Fatma T. Arslan, The Univ. of Texas at San Antonio (United States)
Joann M. Moreno, The Univ. of Texas at San Antonio (United States)
Artyom M. Grigoryan, The Univ. of Texas at San Antonio (United States)

Published in SPIE Proceedings Vol. 6246:
Visual Information Processing XV
Zia-ur Rahman; Stephen E. Reichenbach; Mark A. Neifeld, Editor(s)

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