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Proceedings Paper

Multitemporal DEM co-registering for detecting terrain changes using local invariant patches
Author(s): Tonggang Zhang; Minyi Cen; Guoxiang Liu; Yicong Feng; Zizhen Ren; Ronghao Yang
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Paper Abstract

Debris-flow is one of the major geological hazards in southwest China, which are a global threat and happen and results in thousands deaths and injuries and billions of dollars in damages globally. Automatic multi-temporal DEM coregistration for detecting terrain changes is an attractive but inherent very difficult research topic. Many methods have been proposed in recent years, but all of them can only deal with DEM with limited percentage of terrain changes. However, in landslide and debris-flow areas, the rate of terrain changes is very high. To solve such a problem, a new method for detecting terrain changes using local invariant patches is proposed in this paper. According to the character of the debris-flow activities, the peak and ridge are rarely affected. From where some invariant patches can be extracted associated by the feature extraction method. After co-registration these invariant patches, a coarse matching can be reached. Therefore, two DEM can be compared after applying this coarse matching. With an appropriate threshold, most of terrain changes can be eliminated, and then a fine matching can be anticipated reasonable. The accuracy terrain changes will be derived. The new method can estimate the terrain changes quantificationally and automatically, and verifies by a real application. The experimental results illustrate the proposed method is of robust, accuracy, and timeefficiency.

Paper Details

Date Published: 9 October 2009
PDF: 7 pages
Proc. SPIE 7471, Second International Conference on Earth Observation for Global Changes, 747124 (9 October 2009); doi: 10.1117/12.847913
Show Author Affiliations
Tonggang Zhang, Southwest Jiaotong Univ. (China)
Minyi Cen, Southwest Jiaotong Univ. (China)
Guoxiang Liu, Southwest Jiaotong Univ. (China)
Yicong Feng, Southwest Jiaotong Univ. (China)
Sichuan Department of Land and Resources (China)
Zizhen Ren, Southwest Jiaotong Univ. (China)
Ronghao Yang, Southwest Jiaotong Univ. (China)
Chengdu Univ. of Technology (China)

Published in SPIE Proceedings Vol. 7471:
Second International Conference on Earth Observation for Global Changes
Xianfeng Zhang; Jonathan Li; Guoxiang Liu; Xiaojun Yang, Editor(s)

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