A fast three-dimensional shape measurement method based on color phase coding

Li, Biao; Fu, Yanjun; Zhang, Jiancheng; Wu, Haitao; Xia, Guisuo; Jiang, Guangyu

doi:10.1016/j.ijleo.2015.10.036

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…In order to overcome this problem, color phase-shifting technique has been developed [12][13][14][15][16][17][18][19]. Three phaseshifting patterns are assigned to red, green, and blue channels, respectively.…”

Section: Introductionmentioning

confidence: 99%

Blind Crosstalk Correction for Color Fringe Projection Profilometry Combining the Sine and Cosine Phase-Shifting Patterns

Yang

Zhang

et al. 2022

Journal of Sensors

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Color crosstalk is challenging for color fringe projection profilometry, which will cause color imbalance and phase-shift deviation, thus resulting in phase error. To address this challenge, this paper presents a blind crosstalk correction method for color phase-shifting fringe projection profilometry without crosstalk calibration. Three channels of the color fringe are firstly normalized to resolve color imbalance. The phase error induced by phase-shift deviation between three channels doubles the frequency of the color fringe. Therefore, the original cosine color fringe is shifted by quarter period to generate another sine color fringe to compensate the periodic phase error. Both simulations and experiments were carried out, and their results confirmed the effectiveness and accuracy of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Blind Crosstalk Correction for Color Fringe Projection Profilometry Combining the Sine and Cosine Phase-Shifting Patterns

Yang

Zhang

et al. 2022

Journal of Sensors

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“…To retrieve more accurate absolute phase with higher frequency, Zheng et al [15] proposed to use six additional patterns to encode fringe order; though successful, it actually increases the number of patterns used (9 total patterns). Apparently, similar concepts can be implemented into three color channels [16], but it is well known that using color is not desirable to measure colorful object. Lately, Xing et al [17] attempted to use the Newton-Raphson method to address the nonlinear gamma issues of the phase-coding method if the projector's nonlinear gamma is not pre-calibrated.…”

Section: Introductionmentioning

confidence: 99%

Superfast 3D absolute shape measurement using five binary patterns

Hyun

Zhang

2017

Optics and Lasers in Engineering

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This paper presents a method that recovers high-quality 3D absolute coordinates point by point with only five binary patterns. Specifically, three dense binary dithered patterns are used to compute the wrapped phase; and the average intensity is combined with two additional binary patterns to determine fringe order pixel by pixel in phase domain. The wrapped phase is temporarily unwrapped point by point by referring to the fringe order. We further developed a computational framework to reduce random noise impact due to dithering, defocusing and random noise. Since only five binary fringe patterns are required to recover one 3D frame, extremely high speed 3D shape measurement can be achieved. For example, we developed a system that captures 2D images at 3,333 Hz, and thus performs 3D shape measurement at 667 Hz.

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“…The error compensation methods mentioned in Section 2.2.1 for the SC/GC method can be also applied in PC. Some other methods [97]- [99] has been also…”

Section: Phase Coding Phase Unwrappingmentioning

confidence: 99%

Temporal phase unwrapping towards high-accuracy and high-speed fringe projection profilometry

He¹

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A fast three-dimensional shape measurement method based on color phase coding

Cited by 7 publications

References 16 publications

Blind Crosstalk Correction for Color Fringe Projection Profilometry Combining the Sine and Cosine Phase-Shifting Patterns

Blind Crosstalk Correction for Color Fringe Projection Profilometry Combining the Sine and Cosine Phase-Shifting Patterns

Superfast 3D absolute shape measurement using five binary patterns

Temporal phase unwrapping towards high-accuracy and high-speed fringe projection profilometry

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