Review of fringe-projection profilometry and phase measuring deflectometry

Dong, 刘东 Liu; Tianliang, 严天亮 Yan; Daodang, 王道档 Wang; Yongying, 杨甬英 Yang; Wei, 黄玮 Huang

doi:10.3788/irla201746.0917001

Cited by 4 publications

(3 citation statements)

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“…Structured light 3D imaging technology is widely used in mechanical engineering, intelligent manufacturing, and other fields due to its high precision and high efficiency [20,21]. Three-dimensional imaging technology based on structured light illumination projects the structured light field to the surface of the object through the projection device, takes the deformed light field through the imaging device at another angle, and finally obtains the 3D morphology information of the object through the demodulation of the light field information [22].…”

Section: Gray Code Combined With the Phase Shift Methodsmentioning

confidence: 99%

Three-Dimensional Reconstruction Based on Multiple Views of Structured Light Projectors and Point Cloud Registration Noise Removal for Fusion

Feng,

Wu,

Liu

et al. 2023

Sensors

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Structured light technology is typical for capturing 3D point cloud data. This paper proposes a 3D reconstruction system to obtain point cloud data of complex objects based on nine-order Gray code and an eight-step structured light projection combined with a phase shift and phase unwrapping method. In this system, two projectors serve as bilateral projectors for structured light, along with a camera and rotating platforms. These components were used to obtain point cloud data from multiple perspectives, which helps avoid the shadow areas caused by a single projection angle and provides complementary point cloud data. The point clusters scanned under each perspective were transformed into the same coordinate system. Furthermore, a distance-based point cloud noise removal algorithm was proposed to optimize platform noise and facilitate point cloud data fusion. The experimental results proved that the system effectively captures 3D point cloud data for complex objects. The dimensional quantitative analysis of an aero engine blade was also performed.

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Section: Gray Code Combined With the Phase Shift Methodsmentioning

confidence: 99%

Three-Dimensional Reconstruction Based on Multiple Views of Structured Light Projectors and Point Cloud Registration Noise Removal for Fusion

Feng,

Wu,

Liu

et al. 2023

Sensors

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“…For the above equations ( 6)~(8), since 𝑝 、𝑝 Known, ∆𝑛 、∆𝑛 can be obtained from equation (2). Therefore, if 𝑁 𝑁 can be solved, then we can find𝑛 、𝑛 .…”

Section: Principle and Error Analysismentioning

confidence: 99%

“…This method belongs to non-contact measurement, has the advantages of high imaging accuracy, fast reconstruction speed, etc. [1,2] , and is currently widely used in industrial automatic detection, reverse engineering, human body measurement, aerospace and other fields. Its basic principle is to project structured light to the tested element, collect the image modulated by the tested element, and obtain the surface phase distribution of the tested element according to the solution of the wrapping phase in the image, thus realizing the surface reconstruction.…”

Section: Introductionmentioning

confidence: 99%

Optimization of phase correction method based on multi frequency heterodyne principle

Zou

Shen

Guan

et al. 2023

International Conference on Optics and Machine Vision (ICOMV 2023)

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A phase correction method based on multi frequency heterodyne principle is proposed for the phase jump error caused by multi frequency heterodyne phase solution. The traditional phase shifting method and multi frequency heterodyne are used to calculate the wrapping phase and the unwrapping phase. Aiming at the jump error in the unwrapping phase, the unwrapping phase is used to locate the error position. The wrapping phase is used as a reference to correct the position of the positioning error to obtain a new unwrapping phase. The experimental results show that under the optimization method, this method can effectively judge the jump, and obtain the unwrapping phase without jump error after eliminating the jump, which greatly improves the unwrapping accuracy and accuracy of the fringe pattern after phase unwrapping.

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