面结构光测量系统中基于π/3相移的噪声补偿算法  

Noise Compensation Algorithm Basd on π/3 Phase Shift in Structure Light Measurement System

作　　者：崔索超[1] 孙峰[1] CUI Suo-chao;SUN Feng(Huazhong Institute of Electro-Optics Wuhan National Laboratory for Optoelectronics,Wuhan 430223,Chin)

机构地区：[1]华中光电技术研究所-武汉光电国家实验室,湖北武汉430223

出　　处：《光学与光电技术》2018年第4期19-22,共4页Optics & Optoelectronic Technology

基　　金：科技部国际科技合作(2012DFR10×××)资助项目

摘　　要：噪声处理技术是结构光测量中的一个很重要的技术。投影光强在低环境光照强度下呈现指数传播特性,存在严重的噪声,降低了结构光测量的精度。为了解决此问题,提出了一种基于π/3相移的噪声补偿算法。经过相移,信号的强度反转,噪声强度相应反转,相移前和相移后的噪声叠加取平均,就可以达到噪声补偿的效果。实验表明,该算法简单易用,可以大大消除乘性噪声,提高测量的精度。The noise filter algorithm is an important technique in the structure light measuring system.The projected light intensity of the digital projector exhibits an exponential translation characteristic in the low level illumination environment,and lager multiplicative noises are also found,so the measuring accuracy degrades.To solve this problem,a noise compensation algorithm based on the π/3 phase shift is proposed.After π/3 phase shift,the amplitude of signal alternates,so the noise level will alternate too,which are averaged to compensate the noises.The algorithm is simple and feasible.Experimental results show that the multiplicative noises can be compensated and the accuracy is highly improved.

关 键 词：结构光测量 噪声补偿算法 乘性噪声 相移 三维测量 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]