高效雷达PPI显示算法

An Efficient Algorithm for Radar PPI Display

针对以PPI方式显示雷达原始回波时数据量大、花费时间多的情况,分析了传统雷达的PPI显示算法,比较了画图所用主要函数的时耗情况,提出了几种提高显示效率的思路,然后介绍了作者研制的高效雷达PPI显示算法。重点用代码示例的方法说明了算法中的几个主要内容:缩放、平移时用到的图形裁剪方法,外层扫描中用到的圆弧段扫描方法,内层直线段扫描时提高效率的方法,最后比较并列出了不同算法的实际运行时间。

Since the radar display system on PPI needs showing a large amount of data of the original radar echo, and spends much time, the paper analyzed the traditional PPI algorithm, compared the time consumed by several chief functions called by drawing process; and suggested several way to improve efficiency of the PPI display process, then discussed the efficient display algorithm on PPI developed by author. The paper mainly explained several chief contents in the algorithm with example code, they are the clip method used in scaling and translation, the arc segment scan method used in outer scanning, the method to improve efficiency of drawing the line segment in inner scanning, finally compared and listed the actual running time of different algorithm.