棕版图的提取对实现地形图全自动数字化有着重要的意义。针对彩色扫描地形图,采用一种最大方差理论与FCM聚类算法相结合的提取方法,通过实例验证了该算法的可行性和有效性。从数学的角度,对分割定义和提取方法进行描述和分析。
The extraction of brown map is significant to realize the completely automatic digitization of topographical maps. On account of the color scanned topographical map, an extraction method, which combines OTSU and FCM clustering algorithm, is presented, and the result of a practical example validates the algorithm's feasibility and effectiveness. From the mathematical view, the definition of segmentation and the method of color separation have been described and analyzed.