Results 31 to 40 of about 3,752 (140)
Optimal fringe angle selection for digital fringe projection technique
Applied Optics, 2013 Existing digital fringe projection (DFP) systems mainly use either horizontal or vertical fringe patterns for three-dimensional shape measurement. This paper reveals that these two fringe directions are usually not optimal where the phase change is the largest to a given depth variation.
Wang, Yajun, Zhang, Song
openaire +4 more sources
Machines, 2021 In additive manufacturing (AM), especially for advanced powder fusion machines, it is of high importance to develop an in situ inspection system to monitor the printed surface and pre-print powder bed as the build cycle proceeds.
Yue Liu +3 more
doaj +1 more source
Metrology for Measuring Bumps in a Protection Layer Based on Phase Shifting Fringe Projection
Applied Sciences, 2022 We developed a telecentric 3D measurement system based on the fringe projection technique to measure phases corresponding to the 3D shape of bumps on a surface.
Yi-Sha Ku +5 more
doaj +1 more source
EFFECT OF DIGITAL FRINGE PROJECTION PARAMETERS ON 3D RECONSTRUCTION ACCURACY [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013 3D reconstruction has been already one of the most interesting research areas among photogrammetry and computer vision researchers. This thesis aims to evaluate digital fringe projection method in reconstruction of small objects with complicated shape ...
A. Babaei, M. Saadatseresht
doaj +1 more source
Fringe harmonics elimination in multi-frequency phase-shifting fringe projection profilometry
Optics Express, 2020 In fringe projection profilometry, the purpose of using two- or multi-frequency fringe patterns is to unwrap the measured phase maps temporally. Using the same patterns, this paper presents a least squares algorithm for, simultaneously with phase-unwrapping, eliminating the influences of fringe harmonics induced by various adverse factors.
Chao Jiang, Shuo Xing, Hongwei Guo
openaire +2 more sources
Micromachines, 2023 It is challenging to stably and rapidly achieve accurate absolute phase retrieval for isolated objects with a single-shot pattern in fringe projection profilometry (FPP).
Min Xu +4 more
doaj +1 more source
Optical Fringe Projection: A Straightforward Approach to 3D Metrology
MetrologyOptical fringe projection is an outstanding technology that significantly enhances three-dimensional (3D) metrology in numerous applications in science and engineering.
Rigoberto Juarez-Salazar +2 more
doaj +1 more source
Results in Optics, 2023 Objective: Using phase measuring profilometry (PMP) to measure the object with specular reflections is a very challenging task, a large deviation between the measured result and the actual data is caused by the highlights of the measured object surface ...
Tao Liu +3 more
doaj +1 more source
Three-Dimensional Surface Reconstruction for Specular/Diffuse Composite Surfaces
SensorsThis paper presents an effective three-dimensional (3D) surface reconstruction technique aimed at profiling composite surfaces with both specular and diffuse reflectance.
Chung-Hsuan Huang +4 more
doaj +1 more source
PhotonicsFringe projection profilometry has been widely adopted in various fields due to its non-contact nature, high accuracy, high speed, and full-field measurement capability.
Xiang Sun +6 more
doaj +1 more source