光学精密工程2025，Vol.33Issue(1)：57-74,18.DOI:10.37188/OPE.20253301.0057
网格激光高反抑制与中心提取误差修正
Grid laser high back suppression and center extraction error correction
摘要
Abstract
When a line laser scans metal workpieces,the high reflectivity of certain metal surfaces often leads to poor scanning results.While grid laser scanning is faster than single-line and multi-line scanning,challenges such as center extraction and optical plane positioning hinder its ability to meet the demands of efficient real-time detection of metal workpieces.This study proposes a novel method to address these is-sues by calibrating the rotation angle of a polarizer to optimize the suppression of high surface reflectivity through the polarization state of the grid laser.In addition,a laser center mapping technique based on nor-mal vectors is developed,where the laser center is mapped to the optical plane using the eigenvector corre-sponding to the maximum eigenvalue of the pixel Hessian matrix.A center extraction method based on af-fine transformation is also introduced,enabling the transformation of non-orthogonal grids into orthogonal ones to improve the accuracy of 3D reconstruction.Furthermore,an error correction model is established to reduce measurement system errors by accounting for variations in height.Experimental results demon-strate that the traditional grid laser algorithm struggles with missing edges when scanning highly reflective metal surfaces,resulting in a measurement error of 0.8 mm.In contrast,the proposed method effectively suppresses the impact of high reflectivity,achieves accurate mapping between the laser center and the opti-cal plane,and reduces the measurement error to 0.39 mm.After error correction,the accuracy is further improved,achieving a measurement error of just 0.1 mm,representing an 87.5%reduction compared to the traditional grid laser algorithm.In conclusion,this study investigates 3D reconstruction using grid laser scanning under high-reflection suppression for metal surfaces,significantly improving both scanning effi-ciency and measurement accuracy.The proposed method provides a valuable approach and reference for future industrial measurement applications.关键词
三维测量/网格激光/偏振态/中心提取/法向量Key words
three-dimensional measurement/grid laser/polarization state/center extraction/normal vector分类
计算机与自动化引用本文复制引用
王标,吴南南,马宇晗,姚彦峰,王永红,李骏睿..网格激光高反抑制与中心提取误差修正[J].光学精密工程,2025,33(1):57-74,18.基金项目
安徽省人机共融系统与智能装备工程实验室项目(No.RJGR202205) （No.RJGR202205）
合肥市自然科学基金资助项目(No.2022022) （No.2022022）
国家自然科学基金资助项目(No.52375536) （No.52375536）
