摘要
传统的多线激光三维重建技术由于多线激光线不可避免地会受到噪声的影响,导致检测的激光中心坐标存在一定误差,这将导致直接使用基于极线约束找到的匹配点进行三维重建时无法获得高精度的三维数据。为了解决上述问题,本文提出了一种基于几何估计方法来实现多线激光的三维重建。首先,标定出多线激光的二次曲面方程,结合双目极线约束的方法可以计算出多线激光的初始匹配点。在找到正确的初始匹配点之后,利用图像点与双视图极线的关系约束来建立一个几何距离最小化的估计模型。通过这个几何距离最小化的优化估计,可以重新计算出更加符合极线约束的新匹配点,从而提高激光图像点的匹配精度,最后根据这些新的匹配点来完成多线激光的三维重建。实验结果显示:相较于传统方法,本文提出的算法在匹配度和精度方面表现更优,最终的三维重建精度可以达到0.02mm左右。通过这种方法可以显著提高双目多线激光重建的整体精度,从而获得更加精确和可靠的三维数据。
In traditional multi-line laser 3D reconstruction technology,due to the inevitable noise affecting the multi-line laser lines,the extracted laser center coordinates often contain specific errors.These errors can lead to the inability to obtain high-precision 3D data when using matching points found based on epipolar constraints for 3D reconstruction directly.To address this issue,we propose a method based on geometric estimation to achieve 3D reconstruction of multi-line lasers.First,by calibrating the quadratic surface equations of the multi-line laser,combined with the binocular epipolar constraint method,the initial matching points of the multi-line laser can be calculated.After finding the correct initial matching points,a geometric distance minimization estimation model can be established using the distance constraint from points to epipolar lines.This geometric distance refers to the distance from the laser center points in the left and right images to their corresponding epipolar lines.New matching points that better conform to the epipolar constraints can be recalculated through this geometric distance minimization optimization estimation.Finally,these new matching points can be used to complete the 3D reconstruction of the multi-line laser.Compared to the traditional method based on epipolar constraints,the algorithm proposed in this paper performs better in matching and accuracy.The accuracy of the final 3D reconstruction can reach about 0.02 mm.This method can significantly improve the overall accuracy of binocular multi-line laser reconstruction,thereby obtaining more accurate and reliable 3D data.
作者
黄会明
刘桂华
邓磊
宋涛
钦付平
HUANG Hui-ming;LIU Gui-hua;DENG Lei;SONG Tao;QIN Fu-ping(Southwest University of Science and Technology,School of Information Engineering,Mianyang 621000,china)
出处
《中国光学(中英文)》
北大核心
2025年第2期274-286,共13页
Chinese Optics
基金
装备预先研究共用技术项目(No.50927010302)
广东省电网公司广州供电局的项目(No.080044KK52190002)。
关键词
多线激光
极线约束
几何估计
多线激光重建
multi-line laser
epipolar constraint
geometric estimation
multiline laser reconstruction
