一种新型抗畸变激光光斑检测算法研究  

Research on a new anti-distortion laser spot detection algorithm

作　　者：吴启元 李武森[1] 陈文建[1] WU Qi-yuan;LI Wu-sen;CHEN Wen-jian(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《激光与红外》2024年第7期1063-1068,共6页Laser & Infrared

摘　　要：为了研究大坝内部的沉降和水平位移,设计了一种精密的微位移测量装置。其中,基于二维图像处理的激光光斑位移检测算法为该装置重要的组成部分。本文提出了一种抗畸变激光光斑中心检测算法,通过对原始光斑进行阈值分割,得出光斑发散部分的图像,并通过闭操作和高斯滤波对之进行降噪和平滑。然后,用sobel算子对其进行边缘检测,从而得出较为光滑的边缘轮廓。最后,对其进行抗畸变激光光斑中心检测算法的处理,确定光斑中心。同时,又通过实验装置来采集一系列激光光斑图像,并用传统激光光斑中心检测算法和抗畸变激光光斑中心检测算法对其进行了处理并进行比较。结果表明,抗畸变激光光斑中心检测算法精度最高,有效消除了远距离光斑的畸变对光斑中心计算的影响。In order to study the settlement and horizontal displacement inside the dam,a precise micro displacement measurement device is designed.Among them,the laser spot displacement detection algorithm based on two-dimensional image processing is an important component of the device.In this paper,an anti distortion laser spot center detection algorithm is proposed,in which the image of the divergent part of the spot is derived by threshold segmentation of the original spot,which is denoised and smoothed through closed operations and Gaussian filtering.Then,edge detection is performed using the sobel operator to obtain a smoother edge contour.Finally,the anti-distortion laser spot center detection algorithm is processed to determine the spot center.At the same time,a series of laser spot images are collected through experimental equipment,and processed and compared with the traditional laser spot center detection algorithm and the anti-distortion laser spot center detection algorithm.The results show that the anti-distortion laser spot center detection algorithm has the highest accuracy and effectively eliminates the influence of the aberration of the remote spot on the spot center calculation.

关 键 词：大坝监测 激光光斑中心检测 微位移测量 

分 类 号：TH74[机械工程—光学工程] TN247[机械工程—仪器科学与技术]