High-speed phase-shifting profilometry under fluorescent light

Zheng, Dongliang; Kemao, Qian; Han, Jing; Wang, Jing; Yu, Haotian; Bai, Lianfa

doi:10.1016/j.optlaseng.2020.106033

Cited by 12 publications

(4 citation statements)

References 34 publications

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“…The desired phase can be calculated from these captured fringe patterns by using the transform-based [22] or phase-shifting algorithms [23]. The calculated phase is always wrapped in a range of (−π, π] , and a phase unwrapping process is necessary to obtain the absolute phase [20]. The image correspondence between the projector and the camera can be established from the absolute phase [24].…”

Section: The Front-end: Fpp Techniquementioning

confidence: 99%

“…micrometer-level) and high-speed (i.e. thousands of fps) indoor scene perceiving because the sub-pixel accurate camera-projector correspondences and binary defocus technology [19,20]. Compared with other techniques, FPP also has the inherent advantages of simple hardware configuration, flexibility in implementation, and dense point clouds acquisition [21].…”

Section: Introductionmentioning

confidence: 99%

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Indoor simultaneous localization and mapping based on fringe projection profilometry

Zhao¹,

Zhang²,

Yu³

et al. 2022

Preprint

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Simultaneous Localization and Mapping (SLAM) plays an important role in outdoor and indoor applications ranging from autonomous driving to indoor robotics. Outdoor SLAM has been widely used with the assistance of LiDAR or GPS. For indoor applications, the LiDAR technique does not satisfy the accuracy requirement and the GPS signals will be lost. An accurate and efficient scene sensing technique is required for indoor SLAM. As the most promising 3D sensing technique, the opportunities for indoor SLAM with fringe projection profilometry (FPP) systems are obvious, but methods to date have not fully leveraged the accuracy and speed of sensing that such systems offer. In this paper, we propose a novel FPP-based indoor SLAM method based on the coordinate transformation relationship of FPP, where the 2D-to-3D descriptor-assisted is used for mapping and localization. The correspondences generated by matching descriptors are used for fast and accurate mapping, and the transform estimation between the 2D and 3D descriptors is used to localize the sensor. The provided experimental results demonstrate that the proposed indoor SLAM can achieve the localization and mapping accuracy around one millimeter.

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Section: The Front-end: Fpp Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Indoor simultaneous localization and mapping based on fringe projection profilometry

Zhao¹,

Zhang²,

Yu³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the previous research on SLM, the phase-shifting method is undoubtedly the most popular [10][11][12]. The phase-shifting method projects adaptive sinusoidal patterns onto the surface of objects, and then obtains the texture of the surface of objects based on the triangulation principle and the heterodyne principle [13][14][15]. Such a method of calculating by using the absolute captured light intensity (0-255) of each pixel easily gets high-precision results under normal circumstances.…”

Section: Introductionmentioning

confidence: 99%

Line-encoded structured light measurement method in measuring shiny and transparent objects

Yang

Yang²,

Wu³

et al. 2023

J. Opt.

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Structured Light Measurement (SLM) has been widely used in acquiring the three-dimensional (3D) shape of objects because of its high precision and high speed. However, the intensity based structured light coding strategies like sinusoidal patterns is difficult to measure transparent and shiny objects with high dynamic range (HDR) surface reflectance due to inaccurate light intensity information. Divergent multi-line structured light projection avoids this problem by extracting lines. But it requires a lot of gray-code patterns to unwrap the phase, which reduces the measurement efficiency. To overcome defects, this paper proposes a line-encoded few-pattern structured light measurement method in measuring shiny and transparent objects. In this method, we simultaneously extract the edge line, the center line and obtain their orders by projecting only five patterns. Many experiments were implemented to prove its accuracy and robustness. Because only five patterns are required, the proposed method greatly accelerate the process of reconstruction, which is indispensable for 3D real-time reconstruction. We conducted a dental model dynamic scanning experiment to prove it.

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“…However, it suffers an overlapping spectrum, which limits its performance and makes it hard to calculate complex objects with large curved surfaces [7][8][9] . Compared with FTP, PSP is popular among researchers because of its high stability and high efficiency [9][10][11] . However, the retrieved phase information is wrapped in the range −π, π due to the arctangent function, leading to the need for more additional patterns to unwrap the phase [6,12,13] .…”

Section: Introductionmentioning

confidence: 99%

High-speed three-dimensional shape measurement with inner shifting-phase fringe projection profilometry

Yang

Huang

et al. 2022

Chin. Opt. Lett.

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Fringe projection profilometry (FPP) has been extensively studied in the field of three-dimensional (3D) measurement. Although FPP always uses high-frequency fringes to ensure high measurement accuracy, too many patterns are projected to unwrap the phase, which affects the speed of 3D reconstruction. We propose a high-speed 3D shape measurement method using only three high-frequency inner shifting-phase patterns (70 periods), which satisfies both high precision and high measuring speed requirements. Besides, our proposed method obtains the wrapped phase and the fringe order simultaneously without any other information and constraints. The proposed method has successfully reconstructed moving objects with high speed at the camera's full frame rate (1700 frames per second).

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High-speed phase-shifting profilometry under fluorescent light

Cited by 12 publications

References 34 publications

Indoor simultaneous localization and mapping based on fringe projection profilometry

Indoor simultaneous localization and mapping based on fringe projection profilometry

Line-encoded structured light measurement method in measuring shiny and transparent objects

High-speed three-dimensional shape measurement with inner shifting-phase fringe projection profilometry

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