高反光对象表面的结构光三维成像方法
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摘要
为了改善高反光对象表面的三维重建的质量,提出了一种基于二值相移编码光栅投影的相位融合算法。该算法对饱和相位误差进行分析,利用二值相移投影图案的周期性与对称性实现了饱和相位误差的检测。研究结果表明,相比于基于光照强度判断的饱和误差检测方法,所提方法可以准确检测出存在饱和误差的区域。与修复前相比,修复后的饱和相位误差的均方根值减少了95.7%,最大相位误差减少了96.1%。与传统的检测方法相比,在使用更少测量组的情况下,替换后的饱和相位误差的均方根值减少了16.7%。所提方法可以有效地重建出高反光物体的表面轮廓,且精度更高,无需非线性校正,抗干扰能力强。
In order to improve the accuracy of three-dimensional reconstructed high-reflective surfaces,aphase fusion algorithm is proposed based on binary phase-shifting encoding.The phase error caused by the intensity saturation is analyzed and detected based on the periodicity and symmetry of the binary phase-shifting projection patterns.The research results demonstrate that,compared with the saturation error detection method based on the illumination intensity estimation,the proposed method can more accurately detect the areas with saturation phase errors.Compared with the result before correction,the root mean square error of the corrected phase shows a 95.7% reduction in the saturation phase errors and a 96.1%reduction in the maximum phase error.Compared with the traditional detection methods,the root mean square value of the replaced saturation phase error is reduced by 16.7% when fewer measurement groups are used.The results show that the proposed method can effectively reconstruct the surface profile of high reflective objects.The proposed method doesn't need nonlinear correction,and is of strong anti-noise ability.
In order to improve the accuracy of three-dimensional reconstructed high-reflective surfaces,aphase fusion algorithm is proposed based on binary phase-shifting encoding.The phase error caused by the intensity saturation is analyzed and detected based on the periodicity and symmetry of the binary phase-shifting projection patterns.The research results demonstrate that,compared with the saturation error detection method based on the illumination intensity estimation,the proposed method can more accurately detect the areas with saturation phase errors.Compared with the result before correction,the root mean square error of the corrected phase shows a 95.7% reduction in the saturation phase errors and a 96.1%reduction in the maximum phase error.Compared with the traditional detection methods,the root mean square value of the replaced saturation phase error is reduced by 16.7% when fewer measurement groups are used.The results show that the proposed method can effectively reconstruct the surface profile of high reflective objects.The proposed method doesn't need nonlinear correction,and is of strong anti-noise ability.
引文
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[18]Feng S J,Chen Q,Zuo C,et al.Fast threedimensional measurements for dynamic scenes with shiny surfaces[J].Optics Communications,2017,382:18-27.
[19]Chen B,Zhang S.High-quality 3D shape measurement using saturated fringe patterns[J].Optics and Lasers in Engineering,2016,87:83-89.
[20]Chen C,Gao N,Wang X J,et al.Adaptive pixel-topixel projection intensity adjustment for measuring a shiny surface using orthogonal color fringe pattern projection[J].Measurement Science and Technology,2018,29(5):055203.
[21]Xu X Y,Zhang X C,Xu M.Dynamic threedimensional shape measurement for specular freeform surfaces with the quaternary orthogonal grid fringes[J].Proceedings of SPIE,2016,10155:101553Y.
[22]Kang X,He X Y,Quan C.3D sensing using sinusoidal fringe projection and phase unwrapping[J].Acta Optica Sinica,2001,21(12):1444-1447.康新,何小元,Quan C.基于正弦条纹投影的三维传感及其去包裹处理[J].光学学报,2001,21(12):1444-1447.
[23]Ekstrand L,Zhang S.Three-dimensional profilometry with nearly focused binary phase-shifting algorithms[J].Optics Letters,2011,36(23):4518-4520.
[24]Liu K,Zhong P.Universal decoding method for periodic wave patterns in structured light illumination[J].High Power Laser and Particle Beams,2016,28(9):28091001.刘凯,钟朋.结构光周期图案的统一解码方法[J].强激光与粒子束,2016,28(9):28091001.
[25]Liu C,Gai S Y,Da F P.Sub-regional phase error compensation for structural light measurement[J].Chinese Journal of Lasers,2018,45(6):0604002.刘超,盖绍彦,达飞鹏.结构光测量中分区域相位误差补偿方法研究[J].中国激光,2018,45(6):0604002.
[2]van der Jeught S,Dirckx J J J.Real-time structured light profilometry:a review[J].Optics and Lasers in Engineering,2016,87:18-31.
[3]Chen F,Brown G M,Song M M.Overview of 3Dshape measurement using optical methods[J].Optical Engineering,2000,39(1):10-22.
[4]Lilienblum E,Al-Hamadi A.A structured light approach for 3Dsurface reconstruction with a stereo line-scan system[C]//Proceedings of 2014 IEEEInternational Instrumentation and Measurement Technology Conference,2014:1171-1176.
[5]Srinivasan V,Liu H C,Halioua M.Automated phase-measuring profilometry of 3D diffuse objects[J].Applied Optics,1984,23(18):3105-3108.
[6]Nguyen T T,Slaughter D C,Max N,et al.Structured light-based 3Dreconstruction system for plants[J].Sensors,2015,15(8):18587-18612.
[7]Cai Z W,Liu X L,Peng X,et al.Structured light field 3D imaging[J].Optics Express,2016,24(18):20324-20334.
[8]Li C H,Zhang Y J,Han J T,et al.Asymmetric stripe adjustment method for stripe center extraction[J].Chinese Journal of Lasers,2017,44(5):0504005.李程辉,张英杰,韩江涛,等.应用于条纹中心提取的非对称条纹调整方法[J].中国激光,2017,44(5):0504005.
[9]Liu K,Wang J,Ho Y S.Unidimensional scalable method for structured light projection of 3Dmeasurement[J].Laser&Optoelectronics Progress,2018,55(6):061202.刘凯,王江,Yo-Sung Ho.三维测量结构光一维编码投影机的设计[J].激光与光电子学进展,2018,55(6):061202.
[10]Jiang H Z,Zhao H J,Li X D.High dynamic range fringe acquisition:a novel 3D scanning technique for high-reflective surfaces[J].Optics and Lasers in Engineering,2012,50(10):1484-1493.
[11]Wang Y R,Feng H J,Xu Z H,et al.Autofocus evaluation function based on saturate pixels removing[J].Acta Optica Sinica,2016,36(12):1210001.王烨茹,冯华君,徐之海,等.基于饱和像素剔除的自动对焦评价函数[J].光学学报,2016,36(12):1210001.
[12]Liu F,He C Q,Shen A M,et al.Optimized compensation method of divisional projection for saturated region of structured light[J].Acta Optica Sinica,2018,38(6):0612001.刘飞,何春桥,申爱民,等.结构光饱和区域分区投射优化补偿方法[J].光学学报,2018,38(6):0612001.
[13]Zhao J,Wang Y C,Liu K.New method of restraining the saturated error in phase measuring profilometry[J].Chinese Journal of Lasers,2013,40(10):1008001.赵婧,王永昌,刘凯.一种抑制相位测量轮廓术饱和误差的方法[J].中国激光,2013,40(10):1008001.
[14]Zhang S,Yau S T.High dynamic range scanning technique[J].Optical Engineering,2009,48(3):033604.
[15]Long Y F,Wang S J,Wu W,et al.Accurate identification of saturated pixels for high dynamic range measurement[J].Optical Engineering,2015,54(4):043106.
[16]Waddington C,Kofman J.Sinusoidal fringe-pattern projection for 3Dsurface measurement with variable illuminance[C]//Proceedings of 2010International Symposium on Optomechatronic Technologies,2010:1-5.
[17]Lin H,Gao J,Mei Q,et al.Adaptive digital fringe projection technique for high dynamic range threedimensional shape measurement[J].Optics Express,2016,24(7):7703-7718.
[18]Feng S J,Chen Q,Zuo C,et al.Fast threedimensional measurements for dynamic scenes with shiny surfaces[J].Optics Communications,2017,382:18-27.
[19]Chen B,Zhang S.High-quality 3D shape measurement using saturated fringe patterns[J].Optics and Lasers in Engineering,2016,87:83-89.
[20]Chen C,Gao N,Wang X J,et al.Adaptive pixel-topixel projection intensity adjustment for measuring a shiny surface using orthogonal color fringe pattern projection[J].Measurement Science and Technology,2018,29(5):055203.
[21]Xu X Y,Zhang X C,Xu M.Dynamic threedimensional shape measurement for specular freeform surfaces with the quaternary orthogonal grid fringes[J].Proceedings of SPIE,2016,10155:101553Y.
[22]Kang X,He X Y,Quan C.3D sensing using sinusoidal fringe projection and phase unwrapping[J].Acta Optica Sinica,2001,21(12):1444-1447.康新,何小元,Quan C.基于正弦条纹投影的三维传感及其去包裹处理[J].光学学报,2001,21(12):1444-1447.
[23]Ekstrand L,Zhang S.Three-dimensional profilometry with nearly focused binary phase-shifting algorithms[J].Optics Letters,2011,36(23):4518-4520.
[24]Liu K,Zhong P.Universal decoding method for periodic wave patterns in structured light illumination[J].High Power Laser and Particle Beams,2016,28(9):28091001.刘凯,钟朋.结构光周期图案的统一解码方法[J].强激光与粒子束,2016,28(9):28091001.
[25]Liu C,Gai S Y,Da F P.Sub-regional phase error compensation for structural light measurement[J].Chinese Journal of Lasers,2018,45(6):0604002.刘超,盖绍彦,达飞鹏.结构光测量中分区域相位误差补偿方法研究[J].中国激光,2018,45(6):0604002.
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