Ridge Lines Extraction

■Konno, T., Konno, K., Chiba, N., Ridge Lines Extraction by Hierarchical Planer Segmentation of Measured Point Clouds, Society for Art and Science, Vol.6, No.4, pp.197-206, (2007)．

Abstract:
Registration method unifies some point clouds measured by range sensor in order to get geometric information of whole building. In our previous method we use feature-line matching approach to get geometric information of a building but the result is not good enough because of the limited number of feature lines. In this paper, we extract ridge line to increase the number of feature lines. First, we applied the hierarchical crusting method which based on flatness of building to measured point clouds, then made a boundary line of adjacent two regions as a ridge line. As a result, our extended method has improved the restoring building and the strong constraint measurement conditions, compared to previous method.





feature lines by our previous method
feature lines by our previous method


feature lines by our extended method
feature lines by our extended method


plane regions in order to extract ridge lines
plane regions in order to extract ridge lines


point clouds feature lines
(a) point clouds (b) feature lines
result by our registration method