Accurate particle position measurement from images.
Yan Feng,John Goree,Bin Liu +2 more
TLDR
In this paper, an image analysis technique for subpixel estimation of particle positions is proposed, and an algorithm is proposed to minimize the total error and pixel locking in a dusty plasma experiment.Abstract:
The moment method is an image analysis technique for subpixel estimation of particle positions. The total error in the calculated particle position includes effects of pixel locking and random noise in each pixel. Pixel locking, also known as peak locking, is an artifact where calculated particle positions are concentrated at certain locations relative to pixel edges. We report simulations to gain an understanding of the sources of error and their dependence on parameters the experimenter can control. We suggest an algorithm, and we find optimal parameters an experimenter can use to minimize total error and pixel locking. For a dusty plasma experiment, we find that a subpixel accuracy of 0.017 pixel or better can be attained. These results are also useful for improving particle position measurement and particle tracking velocimetry using video microscopy in fields including colloids, biology, and fluid mechanics.read more
Citations
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Journal ArticleDOI
Single Particle Tracking: From Theory to Biophysical Applications
Hao Shen,Lawrence J. Tauzin,Rashad Baiyasi,Wenxiao Wang,Nicholas A. Moringo,Bo Shuang,Christy F. Landes +6 more
TL;DR: This review summarizes the algorithms behind, and practical applications of, single particle tracking, and highlights some applications of SPT to study various biological and synthetic materials systems.
Journal ArticleDOI
Complex plasmas: a laboratory for strong correlations
TL;DR: In this article, the authors give an overview on recent experimental and theoretical results in complex plasmas, including liquid-like behavior, crystal formation, structural and dynamic properties, which is expected that many of these effects will be of interest also to researchers in other fields where strong correlations play a prominent role.
Journal ArticleDOI
Soliton interaction in a complex plasma.
TL;DR: It was found that the solitons are delayed after the collision, andsolitons with higher amplitude experience longer delays.
Journal ArticleDOI
A Simple Algorithm for Fitting a Gaussian Function [DSP Tips and Tricks]
TL;DR: Gaussian functions are suitable for describing many processes in mathematics, science, and engineering, making them very useful in the fields of signal and image processing.
Journal ArticleDOI
Image analysis with rapid and accurate two-dimensional Gaussian fitting.
Stephen M. Anthony,Steve Granick +1 more
TL;DR: A computationally rapid image analysis method, weighted overdetermined regression, is presented for two-dimensional Gaussian fitting of particle location with subpixel resolution from a pixelized image of light intensity, showing that precision and speed are both improved.
References
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Journal ArticleDOI
Methods of Digital Video Microscopy for Colloidal Studies
John C. Crocker,David G. Grier +1 more
TL;DR: In this article, a set of image processing algorithms for extracting quantitative data from digitized video microscope images of colloidal suspensions is described, which can locate submicrometer spheres to within 10 nm in the focal plane and 150 nm in depth.
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.
Book
Fundamentals of Optics
TL;DR: In this article, the fundamental concepts of optics are discussed. And the basic principles of optics can be found in the following references (http://www.fossiloptics.org):
Journal ArticleDOI
Fundamentals of digital particle image velocimetry
TL;DR: In this paper, the measurement principle of digital particle image velocimetry (PIV) is described in terms of linear system theory and conditions for PIV correlation analysis as a valid interrogation method are determined.
Journal ArticleDOI
Effect of resolution on the speed and accuracy of particle image velocimetry interrogation
TL;DR: In this paper, the effects of resolving the spot using arrays of various resolutions, motivated primarily by a gain in speed, were examined for two specially created test photographs representing uniform flow and solid body rotation using array sizes ranging from 32 × 32 to 256 × 256.
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