Background and amplitude encoded fringe patterns for 3D surface-shape measurement
Sign Up to like & getrecommendations! Published in 2017 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2017.02.014
Abstract: Abstract This paper presents a new fringe projection method for surface-shape measurement that uses background and amplitude encoded high-frequency fringe patterns. The background and amplitude, combined as a codeword, identify the wrapped phase fringe order… read more here.
Keywords: fringe patterns; shape measurement; fringe; background amplitude ... See more keywords
Adaptive oriented PDEs filtering methods based on new controlling speed function for discontinuous optical fringe patterns
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2017.07.018
Abstract: Abstract The filtering of discontinuous optical fringe patterns is a challenging problem faced in this area. This paper is concerned with oriented partial differential equations (OPDEs)-based image filtering methods for discontinuous optical fringe patterns. We… read more here.
Keywords: optical fringe; discontinuous optical; controlling speed; new controlling ... See more keywords
Structured light system calibration with unidirectional fringe patterns
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2018.02.015
Abstract: Abstract For the calibration of a structured light system, one type of highly accurate calibration method was developed by treating the projector as an inverse camera. This type of method typically creates pixel-to-pixel mapping between… read more here.
Keywords: structured light; calibration; fringe; light system ... See more keywords
Speckle-interferometric phase fringe patterns de-noising by using fringes’ direction and curvature
Sign Up to like & getrecommendations! Published in 2019 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2019.02.005
Abstract: Abstract We propose an adaptive filter method based on a deformable window shape to remove the noise of wrapped phase fringe patterns in electronic speckle pattern interferometry (ESPI). The filter kernel automatically adjusts its size,… read more here.
Keywords: fringe; direction; phase fringe; curvature ... See more keywords
A clustering framework based on FCM and texture features for denoising ESPI fringe patterns with variable density
Sign Up to like & getrecommendations! Published in 2019 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2019.03.015
Abstract: Abstract Denoising of electronic speckle pattern interferometry (ESPI) fringe patterns with variable density is challenging. In this paper, we present a method to denoise ESPI fringe patterns with variable density by constructing a clustering framework.… read more here.
Keywords: variable density; density; density fringes; patterns variable ... See more keywords
Binarization of optical fringe patterns with intensity inhomogeneities based on modified FCM algorithm
Sign Up to like & getrecommendations! Published in 2019 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2019.06.025
Abstract: Abstract Binarization of fringe patterns is a commonly used process in the fringe skeleton method for optical fringe pattern analysis. Most of the existing binarization algorithms of fringe patterns are based on the determination of… read more here.
Keywords: fringe; optical fringe; based modified; fringe patterns ... See more keywords
Omnidirectional depth segmentation using orthogonal fringe patterns and multi-scale enhancement
Sign Up to like & getrecommendations! Published in 2020 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2019.105890
Abstract: Abstract Phase-shifted depth segmentation, which is facilitated by the phase-shift invariance of the singular points in different wrapped phase maps, has the advantages of being immune to color, texture, and camera exposure. However, because the… read more here.
Keywords: phase; segmentation; depth segmentation; multi scale ... See more keywords
A dual-projector three-dimensional measurement model for shading problem of micro-scale object complex surface
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Modern Optics"
DOI: 10.1080/09500340.2023.2206928
Abstract: Considering the inherent defects of the traditional triangulation method, always a shadow area is produced in the image collected by the camera. In this work, based on the traditional monocular vision measurement system, an auxiliary… read more here.
Keywords: problem; object; dual projector; measurement ... See more keywords
Windowed Fourier ridges for demodulation of carrier fringe patterns with nonlinearity: a theoretical analysis.
Sign Up to like & getrecommendations! Published in 2018 at "Applied optics"
DOI: 10.1364/ao.57.006198
Abstract: Accurately extracting phase or phase derivative is the most important requirement in optical metrology. However, in practice, there are many error sources, among which nonlinear distortion in fringe patterns is often encountered. Several techniques have… read more here.
Keywords: error; ridges demodulation; fourier ridges; windowed fourier ... See more keywords
Efficient phase retrieval of two-directional phase-shifting fringe patterns using geometric constraints of deflectometry.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.008195
Abstract: In the phase measuring deflectometry, two groups of fringe patterns in orthogonal directions are usually applied to establish the correspondences between the pixel pairs on the screen and camera. Usually, 16 phase-shifting fringe patterns with… read more here.
Keywords: phase shifting; efficient phase; shifting fringe; fringe patterns ... See more keywords
A Neural Network for Denoising Fringe Patterns with Nonuniformly Illuminating Background Noise
Sign Up to like & getrecommendations! Published in 2019 at "Journal of the Korean Physical Society"
DOI: 10.3938/jkps.75.454
Abstract: There are many interference fringe patterns with nonuniformly illuminating background noise. Nonuniformly illuminating background noise may arise from diverse sources, such as scratches, small interfering concentric circles, gaussian noise, etc. with a nonuniform light source.… read more here.
Keywords: patterns nonuniformly; nonuniformly illuminating; illuminating background; background noise ... See more keywords