矢量型电子河道图岸线提取方法研究

为快速准确获取河道岸形线的数据,生成缺乏岸线数据资料的河道矢量型轮廓图,提出一种通过处理雷达图像获取矢量型电子河道图岸形线数据的方法。采用了数学形态学方法实施对雷达图像处理,主要的处理过程包括:雷达图像灰度处理,灰度雷达图像转变为二值图像,二值雷达图像的滤波处理,在以上处理过程的基础上构造了数学形态学结构元素,实施对河道岸线提取,并矢量化处理了离散点。在二值化过程中提出新的方法,针对雷达图像的特点,依据航路规则设计了特殊的滤波过程,提出了提取河道任意边缘的方法。

Research on the Acquisition of River Bank Line Data for Vector Electronic Charts

In order to get data of river bank line accurately and create river bank contour chart of vector type,a method of extracting data through radar image processing is presented.Radar images are processed in the following steps: gray-scale image processing,binary image processing and noise filtering.After these processes,mathematical morphology structure elements are constructed,river-bank-line data extract is carried out and the discrete points are treated with vectorization.A new binary processing method is presented,taking radar image features into account,a special filtering process is designed according to route rules, a method of extracting data from arbitrary river bank edges is presented.