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基于SURF算法的在线三维测量方法

On-line Three-Dimension Measurement Method Based on SURF Algorithm

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摘要

提出了一种采用加速鲁棒特征算法匹配运动物体的特征点,实现在线三维测量的方法.该方法只需投影一固定的正弦光栅到在线运动中的被测物体表面上,使投影光栅线垂直运动方向,当物体每移动相同的距离,由CCD采集到相应的变形条纹图,从中提出对应的背景光场,借助SURF算法对各帧背景光场的物体进行特征匹配,即可获得一组具有等步相移量的等效相移条纹图,从而采用等步相移算法可重构出在线运动物体的三维面形.实验验证了该方法的有效性和可行性,并与在线FTP方法进行了比较,所提方法的平均绝对误差小于在线FTP方法的二分之一,均方根误差小于在线FTP方法的四分之一.

Abstract

An on-line three-dimensional measuring method based on speeded up robust features algorithm is proposed. Only one fixed sinusoidal grating is projected onto the moving measured object to guarantee the fringe direction perpendicular to the moving direction. While the object moves at the same spacing, the corresponding deformed patterns are captured by the CCD camera respectively. Then the background patterns can be extracted from the corresponding captured deformed patterns. With the aid of Speeded Up Robust Features(SURF)feature points matching algorithm on the background patterns, a group of equivalent phase shifting deformed patterns with the same shifting phase can be cut out. So the 3D surface of the online moving object can be reconstructed. The experimental results show the feasibility and effectiveness of the proposed method. Moreover, compared with the online Fourier Transform Profilometry (FTP)method, its average absolute error is less than one-half of that of the online FTP and its root mean square error is less than one quarter of that of the online FTP.

Newport宣传-MKS新实验室计划
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中图分类号:TN247

DOI:10.3788/gzxb20174609.0912002

基金项目:国家科技重大专项(No.2009ZX02204-008)和国家高技术研究发展计划项目(No.2007AA01Z333)资助

收稿日期:2017-04-01

修改稿日期:2017-05-22

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作者单位    点击查看

李建:四川大学 电子信息学院,成都 610065
曹益平:四川大学 电子信息学院,成都 610065
陈澄:四川大学 电子信息学院,成都 610065
万莹莹:四川大学 电子信息学院,成都 610065
付光凯:四川大学 电子信息学院,成都 610065
王亚品:四川大学 电子信息学院,成都 610065

联系人作者:李建(1175111818@qq.com)

备注:李建(1992-),男,硕士研究生,主要研究方向为光学三维测量和光信息处理.

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引用该论文

LI Jian,CAO Yi-ping,CHEN Cheng,WAN Ying-ying,FU Guang-kai,WANG Ya-pin. On-line Three-Dimension Measurement Method Based on SURF Algorithm[J]. ACTA PHOTONICA SINICA, 2017, 46(9): 0912002

李建,曹益平,陈澄,万莹莹,付光凯,王亚品. 基于SURF算法的在线三维测量方法[J]. 光子学报, 2017, 46(9): 0912002

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