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3D Motion Estimation Using a Combination of Correlation and Variational Methods for PIV
[chapter]
Computer Aided Systems Theory – EUROCAST 2007
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In this context, we propose a 3D motion estimation technique based on the combination of an iterative crosscorrelation technique and a variational (energy-based) technique. ...
Estimation of motion has many applications in fluid analysis. ...
We acknowledge the Research Institute CEMAGREF (France) for providing to us the PIV sequence we have used in the experiments. ...
doi:10.1007/978-3-540-75867-9_77
dblp:conf/eurocast/AlvarezCGKMSS07
fatcat:bmayuirhojb3nk4tefv7rzzzqi
3D + time blood flow mapping using SPIM-microPIV in the developing zebrafish heart
2018
Biomedical Optics Express
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SPIM-µPIV enables high quality in vivo measurements of flow fields that will be valuable for studies of heart function and fluid-structure interaction in a range of small-animal models. ...
We present SPIM-µPIV as a flow imaging system, capable of measuring in vivo flow information with 3D micron-scale resolution. ...
We thank Richard Hoppe for his contributions to studying the limitations of brightfield ÎijPIV. VZ is supported by a research training support grant from the EPSRC (EP/M506539/1). ...
doi:10.1364/boe.9.002418
pmid:29760998
pmcid:PMC5946799
fatcat:yjxxoe7xqnbyhev5zozjj4dd5q
Particle Image Velocimetry (PIV) Uncertainty Quantification Using Moment of Correlation (MC) Plane
[article]
2018
arXiv
pre-print
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We present a new uncertainty estimation method for Particle Image Velocimetry (PIV), that uses the correlation plane as a model for the probability density function (PDF) of displacements and calculates ...
MC uses this property to estimate the PIV uncertainty from the shape of the cross-correlation plane. ...
prediction tool and provides a framework to estimate cross-correlation uncertainty even in 3D crosscorrelation. ...
arXiv:1804.10854v1
fatcat:bivw7elx35bwnjsshdegtbtxse
Variational fluid flow measurements from image sequences: synopsis and perspectives
2009
Experiments in Fluids
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We outline promising research directions and point out the potential of variational techniques in combination with correlation-based PIV methods, for improving the consistency of fluid flow estimation ...
Variational approaches to image motion segmentation has been an active field of study in image processing and computer vision for two decades. ...
In order to benefit from the best properties of both variational dense estimators and correlation techniques, an immediate idea is to combine these two methods. ...
doi:10.1007/s00348-009-0778-3
fatcat:p2voujunsrdwxasipwp6ve5syq
A robust motion estimation algorithm for PIV
2005
Measurement science and technology
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The method is based on phase correlation, where the phase of the Fourier components is used for motion parameter estimation. ...
The present study proposes an approach for robust estimation of the instantaneous motion field from a time lagged pair of PIV images. ...
Acknowledgments Research funding was provided by the National Ocean Partnership Program (NOPP) N00014-99-1-1051 and National Science Foundation Grant CAREER IRI-9984842. ...
doi:10.1088/0957-0233/16/3/031
fatcat:6leiqgxsuzfevjemf4x5p6ernm
A variational approach for particle tracking velocimetry
2005
Measurement science and technology
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We introduce a novel variational approach for evaluating PTV image pairs and sequences in two and three dimensions. ...
The experimental evaluation shows that our variational method competes with three alternative approaches. We outline the potential of our method for further developments. ...
This method is considered a variation of the standard crosscorrelation PIV, in which the correlation functions are computed for each interrogation window which is centred on the first-frame particles. ...
doi:10.1088/0957-0233/16/7/007
fatcat:d64ehqzhevfmro4v43o5vybapq
Particle image velocimetry - Classical operating rules from today's perspective
2020
Optics and lasers in engineering
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Although time-resolved volumetric PIV measurements are possible today, the majority of measurements are still performed using planar PIV techniques for good reasons. ...
First, planar PIV is rather simple to both install and use and the data is processed quickly and robustly. ...
But for a reliable uncertainty quantification the methods must be calibrated and tested using synthetic PIV images or flows with know properties. ...
doi:10.1016/j.optlaseng.2020.106185
fatcat:l2jo6nbnhvgcfnuxyorf34bjiu
Limits in Planar PIV Due to Individual Variations of Particle Image Intensities
[chapter]
2012
The Particle Image Velocimetry - Characteristics, Limits and Possible Applications
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All methods use 10 iteration and a velocity estimation grid of 8×8 pixels corresponding to 75 % overlap for 32×32 pixels windows and 50 % overlap for the 16×16 pixels window. ...
The error has been quantified for several commonly used PIV processing methods. ...
The book is aimed at presenting the PIV technique and its wide range of possible applications so as to provide a reference for researchers who intended to exploit this innovative technique in their research ...
doi:10.5772/34671
fatcat:536ymyksofbpvk6xjm2ynraahe
Variational 3D-PIV with sparse descriptors
2018
Measurement science and technology
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We propose a variational model, which makes it possible to directly include physical properties, such as incompressibility and viscosity, in the estimation of the motion field. ...
The second step of 3D-PIV is to then recover the dense motion field from two consecutive particle reconstructions. ...
Christoph Vogel and Thomas Pock acknowledge support from the ERC starting grant 640156, HOMOVIS. We thank Markus Holzner for discussions and help with the evaluation. ...
doi:10.1088/1361-6501/aab5a0
fatcat:n3lnrlgs2feenph4pexiztob6q
A robust videogrametric method for the velocimetry of wind-induced motion in trees
2014
Agricultural and Forest Meteorology
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Therefore, there is a crucial need for non-invasive methods to describe and quantify the complex motion of a plant induced by wind. ...
An adaptation of the classical Particle Image Velocimetry method (nat-PIV) is compared with a tracking method based on the optical flow method of Lukas and Kanade, initialized with the features selection ...
Chaleil for technical assistance with the tree experiments.
Appendix A. ...
doi:10.1016/j.agrformet.2013.10.003
fatcat:hpkmb6qs7nbsxop3oqlqljtav4
Recent advances in digital particle image velocimetry methods for flow motion analysis
2010
International Journal of Metrology and Quality Engineering
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Due to recent advances in image processing methods, and in digital imaging, laser and optics DPIV has become a dominant tool for obtaining velocity information about fluid motion. ...
The advent of charge-coupled devices (CCD) has significantly extended the horizons of full-field measurement methods in many fields of fundamental and applied sciences, including fluid flow dynamics. ...
We would like to thank Omer Altan for proofreading and correcting the English manuscript. ...
doi:10.1051/ijmqe/2010007
fatcat:f2kfhsiqk5dppms32jpzswrf7u
Uncertainty quantification in particle image velocimetry
2019
Measurement science and technology
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Those are divided into a-priori UQ approaches, which provide a general figure for the uncertainty of PIV measurements, and a-posteriori UQ approaches, which are data-based and aim at quantifying the uncertainty ...
particles, imaging of those, analysis of the particle motion, data validation and reduction. ...
Acknowledgments Dr Bernhard Wieneke is kindly acknowledged for the many productive conversations about PIV-UQ and for his valuable comments on this manuscript. ...
doi:10.1088/1361-6501/ab1db8
fatcat:rapmgkgykzazzfok34kqby4vwy
OpenPIV-Matlab – An open-source software for particle image velocimetry; test case: birds' aerodynamics
[article]
2020
arXiv
pre-print
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We extend the PIV analysis with additional tools for post-processing the PIV results including the estimation of aero/hydrodynamic forces from the PIV data of a wake behind an immersed (bluff or streamlined ...
A complete analysis with a variety of post-processing capabilities is demonstrated using time-resolved PIV wake data of a freely flying European starling (Sturnus vulgaris) in a wind tunnel. ...
The open source software could not exist without the vibrant community of users and developers that contribute by their test cases, verification and validation studies, and of course software and documentation ...
arXiv:2007.12967v1
fatcat:7d72psp2sfcxhic54dhdtg7naq
Variational estimation of experimental fluid flows with physics-based spatio-temporal regularization
2007
Measurement science and technology
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We present a variational approach to motion estimation of instationary experimental fluid flows from image sequences. ...
This allows for a recursive on-line (non-batch) implementation of our variational estimation framework. ...
Acknowledgment The authors thank Johan Carlier (Cemagref) for providing the 2D image sequences and Rainer Hain (TU Braunschweig) for providing the cross-correlation estimates. ...
doi:10.1088/0957-0233/18/3/027
fatcat:r3u7syx63jewnks3y7olxjd6ta
3D Fluid Flow Estimation with Integrated Particle Reconstruction
[article]
2018
arXiv
pre-print
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The method exhibits greatly (~70%) improved results over a recent baseline with two separate steps for 3D reconstruction and motion estimation. ...
We show, for the first time, how to jointly reconstruct both the individual tracer particles and a dense 3D fluid motion field from the image data, using an integrated energy minimization. ...
[11] combine TomoPIV with variational 3D flow estimation and account for physical constraints, with a regularizer derived from the stationary Stokes equations. ...
arXiv:1804.03037v2
fatcat:b54rarbvgncwpittzcnljpooci
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