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彩色扫描地形图中等高线提取方法的研究

DOI: 10.11834/jig.2006010241

Keywords: 地形图,地形图分割,等高线提取

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Abstract:

提出了一种从彩色扫描地形图中提取等高线的方法,重点研究并解决等高线的断裂问题。其中,在地形图彩色分割方面,采用本征向量拟合算法计算各类地图符号(包括等高线)样本的颜色特征,以用于克服地形图在扫描过程中出现的颜色混淆和错误现象。在等高线断裂连接方面,提出了针对不同原因造成的断裂用不同的方法连接,并利用线状符号灰度分割结果来改善等高线彩色分割结果的方法。一方面对一些有代表性的地形图样本的提取结果进行了定性描述,另一方面则将该方法用于1:5万国家标准地形图上等高线的提取,通过对结果的定量评价表明,该方法具有一定的实用性。

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