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基于自适应条纹投影的彩色物体三维形貌测量

Three-Dimensional Shape Measurement of Colored Objects Based on Adaptive Fringe Projection

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摘要

针对三维形貌测量技术中彩色物体表面反射率的非均匀性影响测量结果的问题,提出一种基于自适应条纹投影的三维形貌测量技术,该方法可避免彩色物体表面反射率非均匀的影响,提高系统的测量精度。彩色相机采集RGB光强图像,并根据物体表面颜色的反射特性计算每个像素点的最优投射光强和颜色;采集水平和垂直的正弦条纹序列,利用计算所得绝对相位值将相机图像坐标系中每一个像素点的最优投射光强和颜色映射到投影仪像素坐标系;投射自适应条纹序列进而测量彩色物体的三维形貌。实验结果表明,该方法能够有效测量彩色物体三维形貌,具有很高的测量精度。

Abstract

An adaptive fringe projection method is proposed to avoid measurement errors, which is caused by non-uniform surface reflectivity of colored objects, and to enhance accuracy of a 3D measurement system. RGB images are captured by a camera, and optimal color and intensities at each pixel are calculated according to reflectivity characteristics. A set of horizontal and vertical fringe patterns are captured and the corresponding absolute phase are calculated. Optimal color and intensities at each pixel in the camera pixel coordinate system are transformed into the projector coordinate system by using calculated absolute phase. The adapted fringe patterns are projected by projector for measuring object′s 3D shape. Experimental results demonstrate that the proposed method can effectively measure the 3D shape of colored objects and has high measurement accuracy.

Newport宣传-MKS新实验室计划
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中图分类号:TH741

DOI:10.3788/aos201838.0815008

所属栏目:“机器视觉检测与应用”专题

基金项目:重大科学仪器设备开发重点专项(2017YFF0106404)、国家自然科学基金(51675160)、河北省应用基础研究计划重点基础研究资助项目(15961701D)、河北省高层次人才资助项目(GCC2014049)、河北省人才工程培养经费资助项目(A201500503)、河北工业大学联合培养博士研究生项目(2017GN0002)

收稿日期:2017-12-11

修改稿日期:2018-01-13

网络出版日期:2018-03-01

作者单位    点击查看

陈超:河北工业大学机械工程学院, 天津 300130
高楠:河北工业大学机械工程学院, 天津 300130
王向军:天津大学精密测试技术及仪器国家重点实验室, 天津 300072
张宗华:河北工业大学机械工程学院, 天津 300130

联系人作者:张宗华(zhzhangtju@hotmail.com); 陈超(chenchaohebut@hotmail.com);

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引用该论文

Chen Chao,Gao Nan,Wang Xiangjun,Zhang Zonghua. Three-Dimensional Shape Measurement of Colored Objects Based on Adaptive Fringe Projection[J]. Acta Optica Sinica, 2018, 38(8): 0815008

陈超,高楠,王向军,张宗华. 基于自适应条纹投影的彩色物体三维形貌测量[J]. 光学学报, 2018, 38(8): 0815008

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