Circular fringe projection profilometry
WebJan 9, 2024 · State-of-the-art high-accuracy three-dimensional (3D) profilometry systems typically use a lens with a fixed focal length, making it difficult for them to measure scenes with large depth variations, especially dynamically changing ones. To address this need, this Letter proposes a novel, to the best of our knowledge, autofocusing method for high … WebJan 1, 2016 · A projector with small field of view (FOV) is applied to achieve a full 3D reconstruction in our profilometry system. Experiments with a prototype demonstrate …
Circular fringe projection profilometry
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WebMar 1, 2024 · Typically there are 3 phase shifting directions and they are 1) one-direction FPP, i.e. phase directly shifting along a fixed angle, 2) two-direction FPP, i.e. phases … WebJun 1, 2024 · Abstract Since Fringe Projection Profilometry (FPP) is an intensity-based coding strategy, it is prone to improper optical setup arrangement, surface texture and reflectance, uneven illumination distribution, among others. These conditions introduce errors in phase retrieval which lead to an inaccurate 3-D reconstruction.
WebSep 6, 2024 · Circular fringe projection profilometry (CFPP) is a special kind of FPP with telecentric lenses [35–37]. The specialty lies in that CFPP recovers the 3D profile based on the triangulation formed between the optical axis and the projected light rays of a projector. WebMay 15, 2024 · We report that fringe projection profilometry is a well-established technique for optical 3D shape measurement. However, in many applications, it is desirable to make 3D measurements at very high speed, especially with fast moving or shape changing objects. In this work, we demonstrate a new 3D dynamic imaging technique, …
WebMar 1, 2024 · In this paper, based on the extended epipolar geometry, we propose circular fringe projection profilometry to overcome the direction issue without doubling the number of patterns. First, by introducing the farthest and nearest points to the epipole in projector space, we can robustly control the spatial frequency of circular fringes in patterns. WebMay 6, 2024 · Fig. 1. Fringe projection profilometry system. Full size image. The details of our experimental set-up are as following: the optical centers of camera and projector are located at the same distance from the reference plane; the optical axes of the camera and projector are coplanar; and the optical axis of camera is vertical to reference plane.
WebJan 1, 2016 · A projector with small field of view (FOV) is applied to achieve a full 3D reconstruction in our profilometry system. Experiments with a prototype demonstrate the validation and accuracy of the proposed calibration algorithm and system configuration.
WebAug 12, 2024 · Circular fringe projection profilometry (CFPP), as a branch of carrier fringe projection profilometry, has attracted research interest in recent years. Circular fringe Fourier transform profilometry (CFFTP) has been used to measure out-of-plane objects quickly because the absolute phase can be obtai … rahs schoolWebAbstract In fringe projection profilometry (FPP), temporal phase unwrapping is an essential procedure to recover an unambiguous absolute phase even in the presence of large discontinuities or spatially isolated surfaces. So far, there are typically three groups of temporal phase unwrapping algorithms proposed in the literature: multi-frequency … rahs1965.myevent.comWebFeb 4, 2024 · Circular fringe projection profilometry (CFPP) is a recently proposed optical three-dimensional (3D) measurement technique. Theoretically, its optimal measurement accuracy should precede that of the conventional fringe projection profilometry. In practice, the measurement accuracy is impacted by many factors, and … rahs websiteWebCircular fringe projection profilometry. Hong Zhao, Chunwei Zhang, Changquan Zhou, Kejian Jiang, and Meiqi Fang Opt. Lett. 41(21) 4951-4954 (2016) rahs new columbiarahs hockeyWebMar 1, 2024 · In this paper, based on the extended epipolar geometry, we propose circular fringe projection profilometry to overcome the direction issue without doubling the … rahsaan hall electionWebOct 1, 2024 · Fringe projection techniques for 3D shape measurement usually employ linear fringes. • This method has a limit on measurable whole plane displacement. • New … rahsaan hall consulting