激光遥感成像信号与目标细特性关系研究

Relation of laser remote imaging signal and object detail identities

根据提高激光遥感成像分辨率的需要,分析了激光遥感成像分辨率的影响因素,说明了传统处理方法仅利用回波时延和强度信息,难以得到光斑内部地表信息,在某些情况下,甚至会造成较大的成像误差。通过对激光遥感成像信号与地表目标细特性的时空调制关系分析,探讨了地表高度分布与反射率分布特性对回波波形的不同影响,得到激光合成回波数学模型。分析信号反演方程的可解性,利用最小均方误差法得到地表细特性分布的反演结果。通过与传统分析方法得到的成像结果比较,证实该分析方法可以有效提高成像分辨率和成像精度。其中,关于目标细特性的分析提取方法是对激光遥感成像信号处理的开拓性研究。

The effect factor of the ground resolution was analyzed based on the requirement regarding the ground resolution of the laser remote imaging.The fact is pointed out that the terrain detail topography information inside the footprint cannot be determined through using only the echo delay and intensity information. In some cases,the large imaging errors may be occur.The relation of the laser imaging signal and object detail identities was analyzed in the paper. The mathematical model of the laser composed echo was discussed and the terrain detail identities were determined.Compared with the traditional method, this method is proven to have the ability to improve the resolution and accuracy of the laser imaging.The method of terrain detail identities analysis proven by this paper demonstrates innovation in laser remote imaging signal processing.