Flexible structured-light-based three-dimensional profile reconstruction method considering lens projection-imaging distortion

Ma, Shuang; Zhu, Rihong; Quan, Chenggen; Chen, Lei; Tay, Cho Jui; Li, Bo

doi:10.1364/ao.51.002419

Cited by 44 publications

(19 citation statements)

References 32 publications

(81 reference statements)

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“…In Ref. 27, a nonlinear iterative optimization method was proposed to correct the errors caused by lens distortion. Simulated and experimental results showed that the calibration accuracy can be improved compared with the conventional linear model method.…”

Section: Related Workmentioning

confidence: 99%

Method for calibration accuracy improvement of projector-camera-based structured light system

Song

2017

Opt. Eng

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, "Method for calibration accuracy improvement of projector-camera-based structured light system," Opt. Eng. 56(7), 074101 (2017), doi: 10.1117/1.OE.56.7.074101. Abstract. Calibration is a critical step for the projector-camera-based structured light system (SLS).Conventional SLS calibration means usually use the calibrated camera to calibrate the projector device, and the optimization of calibration parameters is applied to minimize the two-dimensional (2-D) reprojection errors. A three-dimensional (3-D)-based method is proposed for the optimization of SLS calibration parameters. The system is first calibrated with traditional calibration methods to obtain the primary calibration parameters. Then, a reference plane with some precisely printed markers is used for the optimization of primary calibration results. Three metric error criteria are introduced to evaluate the 3-D reconstruction accuracy of the reference plane. By treating all the system parameters as a global optimization problem and using the primary calibration parameters as initial values, a nonlinear multiobjective optimization problem can be established and solved. Compared with conventional calibration methods that adopt the 2-D reprojection errors for the camera and projector separately, a global optimal calibration result can be obtained by the proposed calibration procedure. Experimental results showed that, with the optimized calibration parameters, measurement accuracy and 3-D reconstruction quality of the system can be greatly improved.

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Section: Related Workmentioning

confidence: 99%

Method for calibration accuracy improvement of projector-camera-based structured light system

Song

2017

Opt. Eng

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“…Fringe analysis [3,4] decodes the modulated phase, and then phase unwrapping [5,6] obtains the absolute phase. Finally, the 3D information is captured through the phase height model [7,8].…”

Section: Introductionmentioning

confidence: 99%

Micro-phase measuring profilometry: Its sensitivity analysis and phase unwrapping

Tang

Zhang

2015

Optics and Lasers in Engineering

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“…Many projector calibration methods have been studied and they can be divided into three categories. The first category is to use a calibrated camera to determine the geometric parameters of projectors [4][5][6]. By using a liquidcrystal display (LCD) panel as the calibration target, Song and Chung proposed to first calibrate the CCD camera and then the DLP projector [4].…”

Section: Introductionmentioning

confidence: 99%

“…By using a liquidcrystal display (LCD) panel as the calibration target, Song and Chung proposed to first calibrate the CCD camera and then the DLP projector [4]. Ma et al studied lens distortion of the projector by a precalibrated camera [5]. Falcao et al relied on a precalibrated camera to establish the relationship between the camera and a projector [6].…”

Section: Introductionmentioning

confidence: 99%

Accurate projector calibration method by using an optical coaxial camera

et al. 2015

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Digital light processing (DLP) projectors have been widely utilized to project digital structured-light patterns in 3D imaging systems. In order to obtain accurate 3D shape data, it is important to calibrate DLP projectors to obtain the internal parameters. The existing projector calibration methods have complicated procedures or low accuracy of the obtained parameters. This paper presents a novel method to accurately calibrate a DLP projector by using an optical coaxial camera. The optical coaxial geometry is realized by a plate beam splitter, so the DLP projector can be treated as a true inverse camera. A plate having discrete markers on the surface is used to calibrate the projector. The corresponding projector pixel coordinate of each marker on the plate is determined by projecting vertical and horizontal sinusoidal fringe patterns on the plate surface and calculating the absolute phase. The internal parameters of the DLP projector are obtained by the corresponding point pair between the projector pixel coordinate and the world coordinate of discrete markers. Experimental results show that the proposed method can accurately calibrate the internal parameters of a DLP projector.

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Flexible structured-light-based three-dimensional profile reconstruction method considering lens projection-imaging distortion

Cited by 44 publications

References 32 publications

Method for calibration accuracy improvement of projector-camera-based structured light system

Method for calibration accuracy improvement of projector-camera-based structured light system

Micro-phase measuring profilometry: Its sensitivity analysis and phase unwrapping

Accurate projector calibration method by using an optical coaxial camera

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