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| A method for landslide susceptibility zoning in mountainous areas based on change rate of time-of-flight depth images |
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Received:October 27, 2024
Revised:November 26, 2024
Accepted:January 03, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2025.06.011 |
| KeyWord:time-of-flight;depth image;change rate;mountain landslides;susceptibility zoning;trigonometric series fitting |
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Land and Resources Exploration Centre of Hebei Bureau of Geology and Minerals Resources Exploration (Hebei Mining and Geological Disaster Emergency Rescue Center)
, Shijiazhuang 050081, China |
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| Abstract: |
| As a common natural disaster, mountain landslides occur alongside rapid changes in topography and pose a serious threat to human life and property. Traditional monitoring methods such as ground surveys and satellite remote sensing have limitations in real-time monitoring, identification of minor deformations, and large-area coverage. To achieve early identification of minor deformations on landslide surfaces, this paper proposes a method for landslide susceptibility zoning in mountainous areas based on the change rate of Time-of-Flight (TOF) depth images. First, a trigonometric series fitting method is employed to correct harmonic errors in the raw phase data acquired by the TOF camera, thereby obtaining high-precision depth images. Subsequently, by analyzing the change rate of depth values in consecutive frames, surface deformation characteristics are identified. Finally, an adaptive bandwidth kernel density estimation method is used to set a threshold for the change rate, dividing the study area into four susceptibility levels: non-susceptible, low-susceptible, medium-susceptible, and high-susceptible. Experimental results demonstrate that the proposed method effectively improves the accuracy of depth images and the flatness of point clouds, successfully captures minor deformations on landslide surfaces, and achieves reasonable susceptibility level zoning, providing a scientific basis for landslide risk prevention and control in mountainous areas. |
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