【摘要】 文中介绍了一种天气雷达回波图象数据压缩方法,采用微分尖锐化的方法确定回波强度各分层的廓线,再用最小距离法和动态坐标追踪法对廓线点进行排序,并对数据进一步压缩.对回波图象数据压缩之前,应用掩膜滤波法对回波区边缘平滑,使保持原图的主要结构特征.使用这种数据压缩方法,压缩后的数据仅为原图象数据的7％左右,即数据压缩率为93％。更多还原

【Abstract】 A pressing method of radar data is introduced in this paper. As the value changed sharplynear the borders of echo intensity layers. the isopleth is drawn out by differential processing.Actual process is made for several times. Each time the layer thresholds are altered to keep acertain interval and the quality of the isopleths is highly improved. The points on the isoplethare lined rapidly by comparing the sequence of distance among points and the intersectedisopleth is corrected by tracing against a change coordinate. The echo border is filtered bydiaphragm method. After filtered the distorted borders are mended and echo structure is moreobvious. Optional layer can be filtered and others are kept unchanged. By the method mentionedabove only 7 percent original data is used to store or display a echo chart. The pressing rateachieved 93 percent.更多还原