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Proceedings Paper

Implementing a global DEM database on the sphere based on spherical wavelets
Author(s): Di Zhao; Xuesheng Zhao; Shigang Shan; Liangjun Yao
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Paper Abstract

Wavelets have been proven to be an exceedingly powerful and highly efficient tool for fast computational algorithms in the fields of image data analysis and compression. Traditionally, the classical constructed wavelets are often employed to Euclidean infinite domains (such as the real line R and plane R2). In this paper, a spherical wavelet constructed for discrete DEM data based on the sphere is approached. Firstly, the discrete biorthogonal spherical wavelet with custom properties is constructed with the lifting scheme based on wavelet toolbox in Matlab. Then, the decomposition and reconstruction algorithms are proposed for efficient computation and the related wavelet coefficients are obtained. Finally, different precise images are displayed and analyzed at the different percentage of wavelet coefficients. The efficiency of this spherical wavelet algorithm is tested by using the GTOPO30 DEM data and the results show that at the same precision, the spherical wavelet algorithm consumes smaller storage volume. The results are good and acceptable.

Paper Details

Date Published: 4 November 2010
PDF: 6 pages
Proc. SPIE 7840, Sixth International Symposium on Digital Earth: Models, Algorithms, and Virtual Reality, 78401N (4 November 2010); doi: 10.1117/12.872952
Show Author Affiliations
Di Zhao, China Univ. of Mining & Technology (China)
Xuesheng Zhao, China Univ. of Mining & Technology (China)
Shigang Shan, China Univ. of Mining & Technology (China)
Liangjun Yao, China Univ. of Mining & Technology (China)


Published in SPIE Proceedings Vol. 7840:
Sixth International Symposium on Digital Earth: Models, Algorithms, and Virtual Reality
Huadong Guo; Changlin Wang, Editor(s)

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