LiDAR辐射强度信号校正研究进展及趋势

Research Progress and Trend of LiDAR Radiation Intensity Correction

激光雷达不仅能获取目标三维空间信息,还能记录目标反射的回波辐射强度,为实现空谱一体化探测提供基础。但激光雷达信号在传播过程中易受距离、入射角、大气衰减等因素影响,原始强度数据的质量并不能满足后续应用的要求,影响空谱一体化应用的推广。首先论述激光雷达强度数据的产生和应用;随后,着重对国内外的强度校正研究现状进行梳理、归纳和总结;最后,对未来研究方向进行展望。随着未来遥感技术对空谱数据一体化获取需求的增加及技术的不断提升,激光雷达技术的空谱一体化优势必将得到极大提升。

LiDAR can obtain the threedimensional space coordinates of the target,while receiving the echo radiation intensity reflected from the target,which can achieve the integrated acquisition of geometric characteristics and spectral information for targets.However,due to the influence of various factors,such as distance,incident angle,and atmospheric attenuation,the quality of the original intensity signal cannot meet the requirement of subsequent applications,then affecting the promotion of space and spectrum integration application.In this paper,starting from the generation of LiDAR intensity,its principles,characteristics,and applications are discussed.Then,the research status of intensity correction at home and abroad is reviewed,concluded,and summarized.Finally,the possible future research directions are prospected.With the increasing demand for integrated acquisition of spatialspectral data by remote sensing technology in the future,the advantages of spatialspectral integration of LiDAR technology will be greatly improved and widely used.