Image Fusion for Travel Time Tomography Inversion

Liu, L. and Zhao, X. and Yin, X. and Ashraf, M.A. (2015) Image Fusion for Travel Time Tomography Inversion. Polish Maritime Research, 22 (s1). pp. 149-156. ISSN 2083-7429

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Official URL: http://dx.doi.org/10.1515/pomr-2015-0047

Abstract

The travel time tomography technology had achieved wide application, the hinge of tomography was inversion algorithm, the ray path tracing technology had a great impact on the inversion results. In order to improve the SNR of inversion image, comprehensive utilization of inversion results with different ray tracing can be used. We presented an imaging fusion method based on improved Wilkinson iteration method. Firstly, the shortest path method and the linear travel time interpolation were used for forward calculation; then combined the improved Wilkinson iteration method with super relaxation precondition method to reduce the condition number of matrix and accelerate iterative speed, the precise integration method was used to solve the inverse matrix more precisely in tomography inversion process; finally, use wavelet transform for image fusion, obtain the final image. Therefore, the ill-conditioned linear equations were changed into iterative normal system through two times of treatment and using images with different forward algorithms for image fusion, it reduced the influence effect of measurement error on imaging. Simulation results showed that, this method can eliminate the artifacts in images effectively, it had extensive practical significance.

Item Type: Article
Uncontrolled Keywords: Image fusion; Inversion algorithm; Tomography; Wavelet transform
Subjects: Q Science > Q Science (General)
Q Science > QE Geology
Divisions: Faculty of Arts and Social Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 21 Sep 2018 04:52
Last Modified: 21 Sep 2018 04:52
URI: http://eprints.um.edu.my/id/eprint/19367

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