等值线的栅格图形自动生成

摘要

本文针对常规的绘制等值线的方法，提出了一种新的方法，该方法基于计算机图形是由离散点组成，同一数值的所有象素点即构成等值线的原理.由于不需要网格搜索和等值线的游动，使得编制程序简单，绘制的图形精度高，更具有一般性.文中给出了具体的算法，同时利用该方法绘制了某水电工程坝区地形等值线图.%A new method for generating contours in rater graphics is presented in this paper.The method is based on the principle of connecting the pels with the same value in the graphics constructed by computer,which is composed of discrete points.No grid searching and swinging of isoline is needed.The calculation program for this method is simple and the map constructed possesses high precision.An example of applications is given.