TLS强度数据的入射角及距离效应改正方法  

Correction for Incidence Angle and Distance Effects on TLS Intensity Data

作　　者：谭凯[1,2] 程效军[1] 张吉星[1] 

机构地区：[1]同济大学测绘与地理信息学院,上海200092 [2]香港理工大学土地测量与地理资讯学系,香港999077

出　　处：《武汉大学学报（信息科学版）》2017年第2期223-228,共6页Geomatics and Information Science of Wuhan University

基　　金：国土环境与灾害监测国家测绘地理信息局重点实验室开放基金(LEDM2014B05)~~

摘　　要：通过分离目标反射率、入射角及距离三个因素,利用Weierstrass定理,将激光强度表示成三个因素多项式函数的乘积形式,提出一种新的地面三维激光扫描(terrestrial laser scanning,TLS)激光强度改正模型。利用不同反射率的漫反射目标,设计入射角与距离实验,确定各个多项式的次数及系数,求取改正后激光强度值。实验结果表明,与现有改正模型进行比较,本文模型能精确地对激光强度值进行改正,并可以推广到自然目标强度数据的改正。By separating the target reflectance,incidence angle,and distance,the intensity value is expressed as the product of these three factors in the form of their polynomial functions based on the Weierstrass approximation theorem and a new terrestrial laser scanning（TLS）intensity data correction model is proposed.By using diffuse targets with different reflectance values,incidence angle and distance experiments are conducted to estimate the degrees and coefficients of each polynomial by the least squares adjustment and then the corrected intensity.The results show that compared with existing methods the proposed model can accurately correct the intensity value and can be extended to natural surfaces.

关 键 词：激光强度 入射角 距离 地面三维激光扫描 改正方法 

分 类 号：P232[天文地球—摄影测量与遥感]