This paper first expatiates the preprocess of data, which includes choosing the orientation to slice, topologizing the data, offsetting in the normal direction and smoothing the data.
本文首先阐述了点云数据的预处理方法，包括选择分层位向、建立拓扑关系、法向补偿及平滑处理等操作；
Due to the complexity of the image algorithm and the large amount and high-speed of the radar data transaction, it is a real challenge for real-time realization of azimuth preprocess and CTM.
由于成像算法复杂，而且雷达数据量大、速率高，方位预处理和转置存储器的实时实现具有很大的挑战性。
Secondly, it discussed the methods and means of data preprocess and collection.
其次，对数据预处理与信息采集的方法与手段进行了探讨。
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