Elimination method of crosstalk and chromatic aberration between color channels for composite surface measurement

Liu Shuo; Zhang Zonghua; Gao Nan; Meng Zhaozong; Gao Feng

doi:10.12086/oee.2023.220340

Article navigation > Opto-Electronic Engineering > 2023 Vol. 50 > No. 4 > 220340

Next Article Previous Article

Liu S, Zhang Z H, Gao N, et al. Elimination method of crosstalk and chromatic aberration between color channels for composite surface measurement[J]. Opto-Electron Eng, 2023, 50(4): 220340. doi: 10.12086/oee.2023.220340

Citation:

Liu S, Zhang Z H, Gao N, et al. Elimination method of crosstalk and chromatic aberration between color channels for composite surface measurement[J]. Opto-Electron Eng, 2023, 50(4): 220340. doi: 10.12086/oee.2023.220340

Elimination method of crosstalk and chromatic aberration between color channels for composite surface measurement

1.
School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
2.
Centre for Precision Technologies, University of Huddersfield, Huddersfield, HD1 3DH, UK

Fund Project: National Natural Science Foundation of China (52075147)

More Information

^*Corresponding author: zhzhang@hebut.edu.cn

Received Date 14 December 2022

Revised Date 08 February 2023

Accepted Date 15 February 2023

Published Date 25 April 2023

Abstract

Abstract

In order to realize the rapid measurement of composite surfaces with diffuse and mirror reflection, the composite surface measurement system based on fringe projection and fringe reflection can obtain the absolute phase rapidly through the multi-color channel of the camera. Aiming at the crosstalk and chromatic aberration between the color channels introduced by the camera, projector, and display in the composite surface topography measurement, this paper studies the crosstalk elimination method based on the matrix and the chromatic aberration elimination method of the absolute phase corresponding pixel deviation. Based on the crosstalk matrix, the crosstalk matrix of the projector and display screen is established. The crosstalk intensity from other channels in the desired color channel is eliminated to complete the crosstalk elimination between color channels. The absolute phase in the horizontal and vertical directions of each color channel is obtained by color orthogonal stripes. The relationship between phase difference and pixel deviation is established to realize the pixel deviation correction of each pixel point and eliminate the influence of color difference. The experimental results show that the proposed method reduces the average measurement error of the composite step from 0.479 mm to 0.030 mm, and improves the efficiency and accuracy of measurement.
- optical measurements /
- composite surface /
- multiple color channel /
- phase measurement /
- chromatic aberration and crosstalk

FullText(HTML)

References

[1]	Van Der Jeught S, Dirckx J J J. Real-time structured light profilometry: a review[J]. Opt Lasers Eng, 2016, 87: 18−31. doi: 10.1016/j.optlaseng.2016.01.011 CrossRef Google Scholar
[2]	范松如, 范朦, 陈冬晖, 等. 基于时域相移技术的结构光三维微纳形貌检测方法[J]. 光电工程, 2021, 48(4): 200430. doi: 10.12086/oee.2021.200430 CrossRef Google Scholar Fan S R, Fan M, Chen D H, et al. Micro/Nano profile measurement by structured illumination microscopy utilizing time-domain phase-shift technique[J]. Opto-Electron Eng, 2021, 48(4): 200430. doi: 10.12086/oee.2021.200430 CrossRef Google Scholar
[3]	Huang L, Idir M, Zuo C, et al. Review of phase measuring deflectometry[J]. Opt Lasers Eng, 2018, 107: 247−257. doi: 10.1016/j.optlaseng.2018.03.026 CrossRef Google Scholar
[4]	赵涵卓, 高楠, 孟召宗, 等. 双视角三维测量系统同时标定方法[J]. 光电工程, 2021, 48(3): 200127. doi: 10.12086/oee.2021.200127 CrossRef Google Scholar Zhao H Z, Gao N, Meng Z Z, et al. Method of simultaneous calibration of dual view 3D measurement system[J]. Opto-Electron Eng, 2021, 48(3): 200127. doi: 10.12086/oee.2021.200127 CrossRef Google Scholar
[5]	陈贞屹, 赵文川, 张启灿, 等. 基于立体相位测量偏折术的预应力薄镜面形检测[J]. 光电工程, 2020, 47(8): 190435. doi: 10.12086/oee.2020.190435 CrossRef Google Scholar Chen Z Y, Zhao W C, Zhang Q C, et al. Shape measurement of stressed mirror based on stereoscopic phase measuring deflectometry[J]. Opto-Electron Eng, 2020, 47(8): 190435. doi: 10.12086/oee.2020.190435 CrossRef Google Scholar
[6]	王月敏, 张宗华, 高楠. 基于全场条纹反射的镜面物体三维面形测量综述[J]. 光学精密工程, 2018, 26(5): 1014−1027. doi: 10.3788/OPE.20182605.1014 CrossRef Google Scholar Wang Y M, Zhang Z H, Gao N. Review on three-dimensional surface measurements of specular objects based on full-field fringe reflection[J]. Opt Precis Eng, 2018, 26(5): 1014−1027. doi: 10.3788/OPE.20182605.1014 CrossRef Google Scholar
[7]	郭志南, 刘小红, 张宗华. 复合表面三维形貌测量方法的仿真与验证[J]. 激光与光电子学进展, 2020, 57(19): 191202. doi: 10.3788/LOP57.191202 CrossRef Google Scholar Guo Z N, Liu X H, Zhang Z H. Simulation and verification of three-dimensional shape measurement method for composite surface[J]. Laser Optoelectron Progr, 2020, 57(19): 191202. doi: 10.3788/LOP57.191202 CrossRef Google Scholar
[8]	岳慧敏, 李绒, 潘志鹏, 等. 一种面结构光三维测量系统及其测量方法: 106197322B[P]. 2019-04-02. Google Scholar Yue H M, Li R, Pan Z P, et al. Face structure light three-dimensional measuring system: 106197322B[P]. 2019-04-02 Google Scholar
[9]	Sandner M. Hybrid Reflectometry-3D shape measurement on scattering and reflective surfaces[C]//115th Annual Meeting of the DGaO, 2014. Google Scholar
[10]	张宗华, 刘小红, 郭志南, 等. 基于结构光的镜面/漫反射复合表面形貌测量[J]. 红外与激光工程, 2020, 49(3): 0303015. doi: 10.3378/IRLA202049.0303015 CrossRef Google Scholar Zhang Z H, Liu X H, Guo Z N, et al. Shape measurement of specular/diffuse complex surface based on structured light[J]. Infrared Laser Eng, 2020, 49(3): 0303015. doi: 10.3378/IRLA202049.0303015 CrossRef Google Scholar
[11]	张宗华, 李月, 高楠, 等. 基于双屏透射显示的镜面物体三维形貌测量方法及装置: 111765851B[P]. 2021-09-28. Google Scholar Zhang Z H, Li Y, Gao N, et al. Mirror surface object three-dimensional shape measurement method and device based on double-screen transmission display: 111765851B[P]. 2021-09-28 Google Scholar
[12]	Zhang Z H, Xu Y J, Liu Y. Crosstalk reduction of a color fringe projection system based on multi-frequency heterodyne principle[J]. Proc SPIE, 2013, 9046: 904607. doi: 10.1117/12.2034238 CrossRef Google Scholar
[13]	Huang P S, Hu Q, Jin F, et al. Color-encoded digital fringe projection technique for high-speed 3-D surface contouring[J]. Opt Eng, 1999, 38(6): 1065−1071. doi: 10.1117/1.602151 CrossRef Google Scholar
[14]	Hu Y S, Xi J T, Li E B, et al. A calibration approach for decoupling colour cross-talk using nonlinear blind signal separation network[C]//Conference on Optoelectronic and Microelectronic Materials and Devices, 2004, Brisbane, 2005: 265–268. https://doi.org/10.1109/COMMAD.2004.1577541. Google Scholar
[15]	Sun P P, Xue Q, Ji W Z, et al. Analysis and compensation of lateral chromatic aberration of structured light 3D measurement system[J]. Opt Commun, 2021, 488: 126871. doi: 10.1016/j.optcom.2021.126871 CrossRef Google Scholar
[16]	Zhang Z H, Towers C E, Towers D P. Compensating lateral chromatic aberration of a colour fringe projection system for shape metrology[J]. Opt Lasers Eng, 2010, 48(2): 159−165. doi: 10.1016/j.optlaseng.2009.04.010 CrossRef Google Scholar
[17]	Liu X H, Huang S J, Zhang Z H, et al. Full-field calibration and compensation of lateral chromatic aberration based on unwrapped phase[J]. Proc SPIE, 2016, 10021: 1002119. doi: 10.1117/12.2245839 CrossRef Google Scholar

Overview

Overview

Due to the large dynamic range and high precision, the optical 3D measurement technology based on phase calculation is widely used in aerospace, automobile manufacturing, biomedicine, cultural relics protection, and other fields to measure a type of surface. For example, fringe projection profilometry and phase measurement deflectometry are used to measure diffuse and specular surfaces, respectively. With the development of advanced manufacturing technology, the measurement of one type of surface cannot meet the current situation. In the existing research on diffuse and specular composite surfaces, 3D topography restoration of large gradient and discontinuous composite surfaces has been achieved. The composite surface measurement system based on fringe projection and fringe reflection can obtain absolute phase rapidly through the multi-color channel of the camera. However, the multi-color channel of the camera not only realizes the rapid measurement but also introduces the errors such as crosstalk and chromatic aberration into the system, which limits the accuracy of 3D topography restoration of composite surface objects. Crosstalk mainly comes from the process of simultaneously shooting different color stripes projected by the projector to the diffuse part of the object and displayed by the transparent display screen on the mirror part of the object. The color difference mainly comes from the different color stripes displayed by the double screen transmission of the mirror part, and there is a phase difference between the absolute phase of the two colors. Therefore, this paper studies the crosstalk elimination method based on the matrix and the color difference elimination method of absolute phase corresponding pixel deviation. Based on the crosstalk matrix, the crosstalk matrix of the projector and the transparent screen is calculated respectively according to the color light intensity relationship between the color camera, projector, and transparent screen. The stripes of different colors projected on the diffuse surface and mirror of the composite object are separated, and the absolute phase of the two parts is obtained. The absolute phase in the horizontal and vertical directions of each color channel was obtained by color orthogonal stripes, and the relationship between phase difference and pixel deviation between color channels was established to complete the pixel matching of different color channels. Finally, the pixel matching points are converted into the matrix obtained by two-dimensional interpolation to realize the pixel deviation correction of each pixel point and eliminate the influence of color difference. The experimental results show that the proposed method reduces the root mean square error of the composite step from 0.479 mm to 0.030 mm, and improves the measurement efficiency and accuracy.