地面目标激光回波特征实验研究

Experiment study on laser echo identities of terrain object

对地观测激光扫描成像直接利用激光回波信息生成目标的灰度像 ,进行目标分类识别 ,因此 ,需要研究并建立激光回波特征与地面目标特征之间的关系模型。运用对地观测激光成像原理试验系统的实验结果分析了地面目标的脉冲激光回波的功率与波形等主要特征 ,探讨了目标后向散射率特性。通过机载信息获取与数据处理得到了由激光回波生成的局部区域灰度像 ,并且与被动红外成像结果的比较初步得到了地面目标与其激光回波特征之间的关系 。

In laser imaging technology of earth observation, the gray images of terrain objects are produced directly from laser echo information in order to do classification and recognition of the terrain objects. So it is necessary to establish the relative models of laser echo identities and terrain object identities. The power, waveform and other main identities of pulse laser echo from ground are analyzed based on the experimental results of the fundamental system for laser imaging of earth observation. The backward scattered power of terrain objects is discussed. The gray image of part of terrain is produced through laser echo information after airborne information acquiring and data processing. Some elementary relations between laser echo and terrain object are obtained by comparing the gray image and passive infrared imaging result. Some technical supports are provided for 3D laser imaging, classification and recognition of terrain objects.