PIVlab – Towards User-friendly, Affordable and Accurate Digital Particle Image Velocimetry in MATLAB
William Thielicke,Eize Stamhuis +1 more
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TLDR
The accuracy of several algorithms was determined and the best performing methods were implemented in a user-friendly open-source tool for performing DPIV flow analysis in Matlab.Abstract:
Digital particle image velocimetry (DPIV) is a non-intrusive analysis technique that is very popular for mapping flows quantitatively. To get accurate results, in particular in complex flow fields, a number of challenges have to be faced and solved: The quality of the flow measurements is affected by computational details such as image pre-conditioning, sub-pixel peak estimators, data validation procedures, interpolation algorithms and smoothing methods. The accuracy of several algorithms was determined and the best performing methods were implemented in a user-friendly open-source tool for performing DPIV flow analysis in Matlab.read more
Citations
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PI(4,5)P2 forms dynamic cortical structures and directs actin distribution as well as polarity in Caenorhabditis elegans embryos
Melina J. Scholze,Kévin Barbieux,Alessandro De Simone,Mathilde Boumasmoud,Camille C. N. Süess,Ruijia Wang,Pierre Gönczy +6 more
TL;DR: In this paper, the plasma membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP2) localizes to polarized dynamic structures in C. elegans zygotes, distributing in a PAR-dependent manner along the anterior-posterior (A-P) embryonic axis.
Journal ArticleDOI
A Biologist's Guide to Traction Force Microscopy Using Polydimethylsiloxane Substrate for Two-Dimensional Cell Cultures.
TL;DR: A simple in vitro traction force microscopy protocol using ECM protein-coated polydimethylsiloxane substrate and widefield fluorescence microscopy is described, which includes detailed steps for analysis so readers can obtain traction forces to study the mechanobiology of epithelial cells.
Journal ArticleDOI
Planar collapse of a submerged granular column
TL;DR: In this article, the column saturation and release mechanism was investigated and the column mobility was observed to be directly controlled by a and is linked to a clear distinction between triangular and trapezoidal deposits.
Journal ArticleDOI
Application of a multi-smartphone measurement system in slope model tests
TL;DR: In this article, a measurement system called a multi-smartphone measurement (MSM) system was proposed and developed to measure the 3D surface deformation of slope models, which can provide useful information for investigating the behavior and mechanism of landslides.
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A Drone Borne Method to Jointly Estimate Discharge and Manning's Roughness of Natural Streams
Filippo Bandini,Beat Lüthi,Salvador Peña-Haro,Chris Borst,Jun Liu,Sofia Karagkiolidou,Xiao Hu,Grégory Guillaume Lemaire,Poul Løgstrup Bjerg,Peter Bauer-Gottwein +9 more
TL;DR: In this paper, the authors demonstrate a method to estimate vsurf from UAVs with Particl e Image Velocimetry (PIV) using a camera pinhole model.
References
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Journal ArticleDOI
The Design and Implementation of FFTW3
Matteo Frigo,Steven G. Johnson +1 more
TL;DR: It is shown that such an approach can yield an implementation of the discrete Fourier transform that is competitive with hand-optimized libraries, and the software structure that makes the current FFTW3 version flexible and adaptive is described.
Book
Particle Image Velocimetry: A Practical Guide
TL;DR: In this paper, the authors present a practical guide for the planning, performance and understanding of experiments employing the PIV technique, which is primarily intended for engineers, scientists and students, who already have some basic knowledge of fluid mechanics and nonintrusive optical measurement techniques.
Journal ArticleDOI
Particle-Imaging Techniques for Experimental Fluid Mechanics
TL;DR: A review of these methods can be found in articles by Lauterborn & Vogel (1984), Adrian (1986a), Hesselink (1988), and Dudderar et al..
Journal ArticleDOI
Adaptive histogram equalization and its variations
Stephen M. Pizer,Stephen M. Pizer,E. Philip Amburn,E. Philip Amburn,John D. Austin,Robert Cromartie,Ari Geselowitz,Ari Geselowitz,Trey Greer,Bart M. ter Haar Romeny,John B. Zimmerman,John B. Zimmerman +11 more
TL;DR: It is concluded that clipped ahe should become a method of choice in medical imaging and probably also in other areas of digital imaging, and that clip ahe can be made adequately fast to be routinely applied in the normal display sequence.
Journal ArticleDOI
Digital Particle Image Velocimetry
Christian Willert,Morteza Gharib +1 more
TL;DR: In this article, the directional ambiguity associated with PIV and LSV is resolved by implementing local spatial cross-correlations between two sequential single-exposed particle images, and the recovered velocity data are used to compute the spatial and temporal vorticity distribution and the circulation of the vortex ring.