摘要 : This paper addresses the problem of contour lines extraction from scanned topographic maps. A novel method called "local window segmentation" is developed and used to overcome the difficulty of the gaps and thick lines. Experiment... 展开 This paper addresses the problem of contour lines extraction from scanned topographic maps. A novel method called "local window segmentation" is developed and used to overcome the difficulty of the gaps and thick lines. Experiments and evaluations on a number of well- and common-conditioned topographic maps are provided. 收起