光学学报, 2017, 37 (12): 1212002, 网络出版: 2018-09-06   

基于数字微镜器件的高光面物体三维测量方法 下载: 1063次

Three-dimensional Measurement Method of Objects with Specular Surface Based on Digital Micromirror Device
作者单位
天津大学精密测试技术与仪器国家重点实验室, 天津 300072
摘要
在投影结构光的三维形貌测量方法中,由于镜面反射,高光面物体的三维测量无法得到清晰的编码图像,影响了三维坐标信息的解算,进而无法拟合出完整的三维形貌。提出应用数字微镜器件(DMD)为核心的新型DMD相机,应用DMD的高动态范围成像解决传统电荷耦合器件(CCD)采集编码图像过曝光的问题。在传统单目三维测量系统基础上搭建新的系统,建立了DMD相机的高动态范围成像和三维测量的数学模型,结合格雷码的图像匹配方法,获取物体的三维坐标信息。实验结果证明,该系统对高光面物体的成像起到了良好的效果,获得了比较完整的点云位深图,能够进行高动态范围的三维形貌测量。
Abstract
For the three-dimensional measurement method of projection structure light, the three-dimensional measurement of the objects with specular surface can’t get a clear coded image because of the specular reflection. It affects the calculation of the three-dimensional coordinate signal, and the whole three-dimensional morphology cannot be fitted. A new type of digital micromirror device (DMD) applying DMD as core is proposed. The problem of over saturation in acquiring coded image for traditional charge coupled device (CCD) is solved with high dynamic range imaging of DMD. A new system is built based on traditional monocular three-dimensional measurement system. The digital model of three-dimensional measurement and high dynamic range imaging of DMD camera are established. Combined with the matching method of Gray Code, three-dimensional coordinates of the object are obtained. The experimental results show that the system has a positive effect on the imaging of object with specular surface, and relatively complete bitmap is obtained. The system is able to measure three-dimensional morphology with high dynamic range.

邢威, 张福民, 冯维, 曲兴华. 基于数字微镜器件的高光面物体三维测量方法[J]. 光学学报, 2017, 37(12): 1212002. Wei Xing, Fumin Zhang, Wei Feng, Xinghua Qu. Three-dimensional Measurement Method of Objects with Specular Surface Based on Digital Micromirror Device[J]. Acta Optica Sinica, 2017, 37(12): 1212002.

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