多视角沙姆成像的高精度结构光三维测量方法
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TH7

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国家自然科学基金(52225507)、大连理工大学辽宁省微纳米技术及系统重点实验室开放课题基金项目资助


High-precision structured-light 3D measurement method based on multi-view Scheimpflug imaging
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    摘要:

    传统结构光测量方法在测量高反射率和复杂结构表面存在诸多挑战,且测量精度受到测量视场的限制。 本文提 出了一种基于结构光投影和多视角沙姆成像的高精度标定及三维测量方法,充分利用系统的景深范围。 提出结构光多 目视觉测量模型,将投影仪坐标系作为系统测量坐标系,通过建立“三维点-投影图像点-4 个相机图像点”的对应关系对 系统进行一体化标定,然后利用多视图几何成像约束,通过计算最小二乘解融合多个视角的观测信息,提高三维数据的 计算精度。 实验结果表明,所提方法和系统可以对高反射率和遮挡表面进行准确测量,测量精度达到 5 μm,大大优于传 统结构光测量方法。

    Abstract:

    Traditional structured-light (SL) measurement methods face challenges in measuring surface with high reflectivity and complex structure. The measurement accuracy is limited by the measurement field of view. This article proposes a high-precision calibration and 3D measurement method based on structured-light projection and multi-view Scheimpflug imaging, which can make full use of the depth range of the system. A novel structured-light multi-view stereo measurement model is proposed. The projector coordinate system is used as the measurement coordinate system, and the multi-view structured-light system is calibrated in an integrated way by establishing the corresponding relationship of " 3D point-projection image point-4 camera image points" . With the use of multi-view geometric imaging constraints, the observation information of multiple perspectives is fused by calculating the least square solution to improve the calculation accuracy of 3D data. Experimental results show that the proposed method and system can accurately measure high reflectivity and occluded surfaces, with a measurement accuracy of 5 μm, which is substantially superior to the traditional SL methods.

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刘 勇,张国锋,胡鹏宇,邓惠文,杨树明.多视角沙姆成像的高精度结构光三维测量方法[J].仪器仪表学报,2023,44(3):33-40

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  • 在线发布日期: 2023-07-11
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