High-Accuracy Three-Dimensional Deformation Measurement System Based on Fringe Projection and Speckle Correlation

Zhang, Chuang; Liu, Cong; Xu, Zhihong

doi:10.3390/s23020680

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…In this case, the SPPWM pattern is significantly affected by higher harmonics and speckle patterns. In the case where traditional algorithms cannot simultaneously eliminate the interference of high-order harmonics and speckle patterns, based on the potential of deep learning in eliminating high-order harmonics [45] and noise [32,46], we proposed a sinusoidal pattern reconstruction network (SPRNet) that can simultaneously eliminate high-order harmonics and speckle patterns in SPPWM patterns to obtain high-quality sinusoidal patterns. In addition, considering the distribution characteristics of speckle patterns in SPPWM pattern, we proposed a multi-temporal spatial correlation matching algorithm (MTSCMA), which achieves a more reliable coarse disparity map calculation.…”

Section: Introductionmentioning

confidence: 99%

Three 1-bit speckle-embedded pulse-width modulation patterns for robust absolute 3D measurement

Zheng,

Li,

Zuo

et al. 2024

Meas. Sci. Technol.

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In 3D shape measurement techniques using structured light, 1-bit pulse-width modulation (PWM) patterns and 1-bit speckle patterns can be projected at high speed. However, when combining PWM and speckle patterns to integrate their advantages, the decoupling problem is insurmountable. In this work, a novel 1-bit speckle-embedded pulse-width-modulation (SP-PWM) patterns was proposed to achieve absolute 3D shape measurement using only three binary patterns. Our method consists of three main steps: First, a sinusoidal pattern reconstruction network (SPRNet) was proposed to eliminate the high-order harmonics and speckle patterns in the SP-PWM patterns and obtain high-quality sinusoidal patterns. Second, a multi-temporal spatial correlation matching algorithm (MTSCMA) was proposed to obtain a coarse disparity map from the three SP-PWM patterns. Third, the high-accuracy wrapped phase map is used as an additional constraint for refining the coarse disparity map to obtain the final high-accuracy disparity map for absolute 3D measurement without phase unwrapping. Our method combines the advantages of fringe projection profilometry techniques for high-precision wrapped phase retrieval and speckle correlation matching algorithms for robust and unambiguous disparity map calculation. The experimental results demonstrated that our method could realize high-precision absolute 3D shape measurement with an accuracy of 0.057mm using only three 1-bit SP-PWM patterns. Furthermore, different simulation noises were used to demonstrate the robustness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Three 1-bit speckle-embedded pulse-width modulation patterns for robust absolute 3D measurement

Zheng,

Li,

Zuo

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Unfortunately, the practicality of using median filtering to remove speckles depends on the size and color depth of the speckles, which makes it ineffective in certain situations. Zhang [ 34 ] and others proposed a fringe image extraction method based on deep learning technology that transformed speckle-embedded fringe images into speckle-free fringe images. However, deep learning methods require training a large number of samples and may not be able to cope with complex surface conditions of objects.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Shape and Deformation Measurements Based on Fringe Projection Profilometry and Fluorescent Digital Image Correlation via a 3 Charge Coupled Device Camera

Sun

Zhou

et al. 2023

Sensors

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We propose a novel hybrid FPP-DIC technique to measure an object’s shape and deformation in 3D simultaneously by using a single 3CCD color camera, which captures the blue fringe patterns and red fluorescent speckles within the same image. Firstly, red fluorescent speckles were painted on the surface of the specimen. Subsequently, 12 computer-generated blue fringe patterns with a black background were projected onto the surface of the specimen using a DLP projector. Finally, both the reference and deformed images with three different frequencies and four shifted phases were captured using a 3CCD camera. This technique employed a three-chip configuration in which red–green–blue chips were discretely integrated in the 3CCD color camera sensor, rendering independent capture of RGB information possible. Measurement of out-of-plane displacement was carried out through the implementation of Fringe Projection Profilometry (FPP), whereas the in-plane displacement was evaluated using a 2D Digital Image Correlation (DIC) method by leveraging a telecentric-lens-based optical system. In comparison to the traditional FPP-DIC hybrid methodology, the present approach showed a lower incidence of crosstalk between the fringe patterns and speckle patterns while also offering a corrective for the coupling of the in-plane displacement and out-of-plane displacement. Experimental results for the in-plane cantilever beam and out-of-plane disk comparisons with the traditional 3D-DIC method indicated that the maximum discrepancy obtained between FPP-DIC and 3D-DIC was 0.7 μm and 0.034 mm with different magnifications, respectively, validating the effectiveness and precision of the novel proposed FPP-DIC method.

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Digital holographic 3D surface topography measurement based on recording-plane rotation

Song

Wang

et al. 2023

Optics Communications

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High-Accuracy Three-Dimensional Deformation Measurement System Based on Fringe Projection and Speckle Correlation

Cited by 6 publications

References 25 publications

Three 1-bit speckle-embedded pulse-width modulation patterns for robust absolute 3D measurement

Three 1-bit speckle-embedded pulse-width modulation patterns for robust absolute 3D measurement

Three-Dimensional Shape and Deformation Measurements Based on Fringe Projection Profilometry and Fluorescent Digital Image Correlation via a 3 Charge Coupled Device Camera

Digital holographic 3D surface topography measurement based on recording-plane rotation

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