Results 1 to 10 of about 3,752 (140)

Single-shot detection of 8 unique monochrome fringe patterns representing 4 distinct directions via multispectral fringe projection profilometry [PDF]

open access: yesScientific Reports, 2021
Spatial resolution in three-dimensional fringe projection profilometry is determined in large part by the number and spacing of fringes projected onto an object. Due to the intensity-based nature of fringe projection profilometry, fringe patterns must be
Parsa Omidi   +3 more
doaj   +2 more sources

Fringe Projection Profilometry Based on Saturated Fringe Restoration in High Dynamic Range Scenes [PDF]

open access: yesSensors, 2023
In high dynamic scenes, fringe projection profilometry (FPP) may encounter fringe saturation, and the phase calculated will also be affected to produce errors.
Hongru Li   +7 more
doaj   +2 more sources

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

open access: yesSensors, 2023
Fringe projection profilometry (FPP) and digital image correlation (DIC) are widely applied in three-dimensional (3D) measurements. The combination of DIC and FPP can effectively overcome their respective shortcomings. However, the speckle on the surface
Chuang Zhang, Cong Liu, Zhihong Xu
doaj   +2 more sources

Single-Model Self-Recovering Fringe Projection Profilometry Absolute Phase Recovery Method Based on Deep Learning [PDF]

open access: yesSensors
A drawback of fringe projection profilometry (FPP) is that it is still a challenge to perform efficient and accurate high-resolution absolute phase recovery with only a single measurement.
Xu Li   +5 more
doaj   +2 more sources

Assessment of Fringe Pattern Decomposition with a Cross-Correlation Index for Phase Retrieval in Fringe Projection 3D Measurements [PDF]

open access: yesSensors, 2018
Phase retrieval from single frame projection fringe patterns, a fundamental and challenging problem in fringe projection measurement, attracts wide attention and various new methods have emerged to address this challenge. Many phase retrieval methods are
Xinjun Zhu   +3 more
doaj   +2 more sources

Fringe Projection Profilometry in Production Metrology: A Multi-Scale Comparison in Sheet-Bulk Metal Forming [PDF]

open access: yesSensors, 2021
Fringe projection profilometry in combination with other optical measuring technologies has established itself over the last decades as an essential complement to conventional, tactile measuring devices.
Lennart Hinz   +15 more
doaj   +2 more sources

Weakly Supervised Depth Estimation for 3D Imaging with Single Camera Fringe Projection Profilometry [PDF]

open access: yesSensors
Fringe projection profilometry (FPP) is widely used for high-accuracy 3D imaging. However, employing multiple sets of fringe patterns ensures 3D reconstruction accuracy while inevitably constraining the measurement speed.
Chunqian Tan, Wanzhong Song
doaj   +2 more sources

Two-plus-two fringe projection profilometry based on phase-shifted coding [PDF]

open access: yesScientific Reports
In fringe projection profilometry based on temporal phase unwrapping, determining a fringe order map commonly requires a large number of fringes. To reduce the fringe number, this paper proposes a concise absolute phase retrieval algorithm just by ...
Hechen Zhang   +4 more
doaj   +2 more sources

A Flexible Fringe Projection Vision System with Extended Mathematical Model for Accurate Three-Dimensional Measurement [PDF]

open access: yesSensors, 2016
In order to acquire an accurate three-dimensional (3D) measurement, the traditional fringe projection technique applies complex and laborious procedures to compensate for the errors that exist in the vision system.
Suzhi Xiao, Wei Tao, Hui Zhao
doaj   +2 more sources

Fringe-Based Structured-Light 3D Reconstruction: Principles, Projection Technologies, and Deep Learning Integration [PDF]

open access: yesSensors
Structured-light 3D reconstruction is an active measurement technique that extracts spatial geometric information of objects by projecting fringe patterns and analyzing their distortions.
Zhongyuan Zhang   +8 more
doaj   +2 more sources

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