摘要
以西沙群岛—宣德群岛为研究区,以WorldView-2高分辨率遥感卫星数据为数据源,在众多前人水边线提取经验的基础上,摸索出一种适用于西沙群岛一级水体的水边线自动提取方法。根据WorldView-2的八个波段光谱曲线特征分布图,创建了水边线提取的指数模型。利用该模型进行图像分割后能有效实现岛屿的水陆分离,在此基础上通过边缘检测算子运算快速地提取出岛屿水边线,最后利用掩膜技术使断续的水边线连续起来,从而得到岛屿的水边线信息。将此方法推广到西沙群岛的东岛和七连屿诸岛,结果表明该方法能有效地提取出岛屿水边线。
Based on the previous waterside line research and WorldView-2satellite data sources,the author explored out a new waterside line automatic extraction method for the Paracel Islands with high water quality.The study area is Xuande island in Paracel Islands.And the author created index model of waterside line extraction,according to spectral curve features of Worldview-2eight bands.Firstly,the model for image segmentation is used to separate water area from the land,and then waterside line is extracted by edge detection algorithm.Finally the intermittent waterside line is connected in a row by mask technology.Thus,the waterside line extraction is done.What＇s more,this method can be promoted to Seven Joint Islands and Eastern Island,and the practice results prove that this method is effective.
出处
《工程地球物理学报》
2014年第4期562-567,共6页
Chinese Journal of Engineering Geophysics
基金
中国地质大调查项目(编号:12120113003200)资助
