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• W2750577462 abstract "This paper presents a new method for extracting blocks and calculating block size automatically from rock surface 3D point clouds. Block size is an important rock mass characteristic and forms the basis for several rock mass classification schemes. The proposed method consists of four steps: 1) the automatic extraction of discontinuities using an improved Ransac Shape Detection method, 2) the calculation of discontinuity intersections based on plane geometry, 3) the extraction of block candidates based on three discontinuities intersecting one another to form corners, and 4) the identification of “true” blocks using an improved Floodfill algorithm. The calculated block sizes were compared with manual measurements in two case studies, one with fabricated cardboard blocks and the other from an actual rock mass outcrop. The results demonstrate that the proposed method is accurate and overcomes the inaccuracies, safety hazards, and biases of traditional techniques." @default.
• W2750577462 created "2017-08-31" @default.
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• W2750577462 date "2017-12-01" @default.
• W2750577462 modified "2023-10-16" @default.
• W2750577462 title "Automatic extraction of blocks from 3D point clouds of fractured rock" @default.
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• W2750577462 doi "https://doi.org/10.1016/j.cageo.2017.08.013" @default.
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