彩色地形图矢量化算法的设计与实现

提出了一种从彩色扫描地形图中提取等高线的方法。其中，在等高线细化方面采用局部细化的策略，在智能跟踪中提出了方向式搜索，不仅避免了像素点的重复判断，而且保证了追踪过程的正确性。采用了一些有代表性的国家标准地形图进行测试，通过计算具体度量指标对提取结果作了定量分析。实验表明该方法在实际应用中具有很好的实用性。

Design and Realization of Vectorization Algorithm on Color Scanned Top-ographical Maps

In this paper an effective method for extracting contour lines from color scanned topographical maps is proposed. In contour lines thinning, local thinning strategy is adopted. In automatic tracking, an orientation-based searching mode is also proposed, which not only avoids repeat judgement, but also guarantees correctness of the tracking process. Finally, some representative national standard topographic maps with a scale of 1:50,000 are tested, and an evaluation scheme for the results is provided. The ex...