基于GDI对象的等值线填充算法研究  

Algorithm for Isoline Filling Based on the GDI Object

作　　者：涂美义[1] 

机构地区：[1]湖北省国土资源厅,湖北武汉430070

出　　处：《地理空间信息》2008年第2期71-73,共3页Geospatial Information

摘　　要：从解决等值线填充的关键问题入手,即如何确定两条等值线之间的区域以及确定用何种RGB颜色值进行填充,提出了一种基于基础的图形设备接口对象CRgn类的等值线填充方法。该方法建立在底层GDI对象基础上,可以直接利用GDI对象的规则,使填充过程变得简单,感兴区域可随机选择填充,具有很好的实用价值。文中给出了具体的算法流程以及基于该算法的填充实例。This essay focuses on the filling of isoline, which is how to identify the region between two isolines as well as how to identify the value of RGB when fill in the region, then a new method based on the graphic device interface object CRgn to fill in the isoline is presented. This method which builds on the bottom of GDI object can directly use the regulation of GDI object. It can make the process of filling simpler, fills the interesting region at random and has a good practical value. The essay also gives the algorithm and the example.

关 键 词：图形设备接口 等值线 区域逻辑运算 填充 

分 类 号：P208[天文地球—地图制图学与地理信息工程]