Circular fringe projection profilometry

Author: ymrx

August undefined, 2024

WebTemporal phase-unwrapping methods for fringe projection profilometry, mainly represented by the multi-frequency and multi-wavelength classes, are fundamental to recovering the 3D information from the continuous phase, also allowing measure discontinuities and isolated objects. In this paper, it is proposed a temporal phase … 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 …

Flexible calibration method for telecentric fringe projection ...

WebIn fringe projection profilometry (FPP) based on temporal phase unwrapping (TPU), reducing the number of projecting patterns has become one of the most important works in recent years. To remove the $2\pi $ ambiguity independently, this paper proposes a TPU method … 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 … how did religion began

Point-Wise Phase Estimation Method in 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 … WebJun 1, 2024 · Fringe projection profilometry (FPP) [1] is an important three-dimensional (3D) measurement technique with the advantages of noncontact, high accuracy, high speed, and simple instrumentation;... WebOct 1, 2024 · Fringe projection techniques for 3D shape measurement usually employ linear fringes. • This method has a limit on measurable whole plane displacement. • New … how did religion influence abolition

Efficient method for detecting a zero-phase point in off …

Microscopic fringe projection profilometry system calibration …

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 … 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. how did religion motivate european explorersWebNov 1, 2016 · In [15], circular fringe projection profilometry (CFPP) was presented to accomplish 3D measurement. CFPP can be regarded as a variant of FPP which is called … how did religion affect witchcraft

"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. " - Circular fringe projection profilometry

Circular fringe projection profilometry

Three-dimensional measurement based on optimized …

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. WebIn this Letter, a novel three-dimensional (3D) measurement method, called the circular fringe projection profilometry (CFPP), is proposed. Similar to the conventional fringe …

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WebIn fringe projection profilometry, high-order harmonics information of distorted fringe will lead to errors in the phase estimation. In order to solve this problem, a point-wise phase estimation method based on a neural network (PWPE-NN) is proposed in this paper. The complex nonlinear mapping relationship between the gray values and the phase under … Web期刊：Eighth Symposium on Novel Photoelectronic Detection Technology and Applications文献作者：Pengxu Zhou; Huikai Zhong; Cheng Gui; Yanjun Fu出版日期： ... Microscopic fringe projection profilometry system calibration based …

WebAug 12, 2024 · Fringe projection profilometry (FPP), as a common active optical three-dimensional (3D) measurement technology, has advantages of high-precision, non …

WebFeb 26, 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 … 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 …

WebIn phase-shifting fringe projection profilometry, the projector nonlinearity has been recognized as one of the main error-inducing factors, especially when only very few fringe patterns are available. For solving this issue, this paper presents a simple and effective method, that allows us to recognize and remove, directly from a calculated ...

WebAbstract 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 … how many songs is a epWebPhase demodulation is an essential image processing stage required by digital fringe projection profilometers. Currently, several approaches for phase demodulation have been proposed. In this work, a set of phase demodulation methods useful for digital fringe projection profilometry is presented. how did religion change under henry viiiWebAug 1, 2024 · Fringe projection profilometry is widely used for three-dimensional (3D) measurements. System calibration is crucial to fringe projection systems, since it … how many songs on 1gbWebCircular fringe projection profilometry. Hong Zhao, Chunwei Zhang, Changquan Zhou, Kejian Jiang, and Meiqi Fang Opt. Lett. 41(21) 4951-4954 (2016) how many songs on 16gb mp3WebSep 21, 2014 · Abstract Industrial metrology and inspection systems commonly rely on phase measurement profilometry (PMP) using sinusoidal fringe patterns projecting, yielding dense, and accurate 3D reconstruction regardless of the presence of texture. how did religion change during tudor timesWebCircular fringe Fourier transform profilometry (CFFTP) based on a triangulation system has the capability of whole out-of-plane measurement using fewer fringes. To the best of … how many songs is an epWebOct 26, 2024 · Discussion on accurate phase–height mapping in fringe projection profilometry. Abstract. Establishing a highly accurate phase-to-height mapping … how did religion influence reform movements