摘要
提出一种基于红、绿、蓝和红外并行4颜色通道的条纹投影三维测量技术,实现单次测量获得物体的表面三维形貌。该技术克服了传统方法投影多帧条纹图像而造成测量速度慢的缺点,在保证精度的同时提高了测量速度。结合两步相移、傅里叶变换法和最佳三条纹选择法的相位求解方法,独立计算各个像素点的绝对相位,从单次同时采集的复合彩色图像和红外图像中获得非连续物体等复杂面形的三维形貌数据。利用半透半反镜实现了可见光和红外两个投影仪的光轴同路,并建立它们之间的投影变换,实现了两个投影仪像素间的精确对应。利用所研制的系统,测量了非连续的静态物体和动态物体,获取了它们的表面三维形貌数据。结果显示,所研制的方法适用于三维形貌的快速测量。
We present a three-dimensional（3 D）shape measurement technique based on parallel four-color channels（red,green,blue and infrared）fringe projection,which only needs one-time measurement to reconstruct the 3 D surface shape of an object.The proposed technique overcomes the shortcomings of slow measurement speed caused by multi-frame fringe images projection in the traditional fringe projection,and possesses high accuracy.Two-step phase shift,Fourier transform with the optimum three-frequency method are combined to calculate the absolute phase pointby-point independently and recover 3 D shape measurement of complex objects,such as discontinuities,from the deformed composite color fringe pattern and infrared fringe pattern captured simultaneously.A beam splitter has been used to realize coaxial design and to build the projecting transformation between the visible light projector and the infrared light projectors,so that they build up the accurate pixel-to-pixel correspondence.Several experiments on static and dynamic objects are performed to obtain the 3 D shape,and experimental results show that the proposed method is suitable for fast 3 D shape measurement.
作者
王张颖
高楠
张宗华
Wang Zhangying;Gao Nan;Zhang Zonghua(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第8期209-216,共8页
Acta Optica Sinica
基金
国家重点研发计划重点专项(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(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(A201500503)
关键词
机器视觉
三维传感
并行四颜色通道
条纹投影
相位测量
快速三维面形测量
machine vision
three-dimensional sensing
parallel four-color channels
fringe projection
phase measurement
fast 3D shape measurement
