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SUMMARY:Free Online Presentation - PaIRS-UniNa (PArticle Image Reconstructi
 on Software – University of Naples “Federico II”) (2)
DESCRIPTION:You are invited to attend the presentation of PaIRS-UniNa (PArt
 icle Image Reconstruction Software – University of Naples “Federico II
 ”)\, a free software application designed to perform digital particle im
 age velocimetry (PIV). The presentation by Dr. Gerardo Paolillo will take 
 place online on 17 October from 1:30PM to 3:15PM
 Abstract:  PaIRS-UniNa
  (PArticle Image Reconstruction Software – University of Naples “Feder
 ico II”) relies on a powerful C library designed for speed\, robustness 
 and accuracy\, and a user-friendly graphical interface running in Python e
 nvironment on all operating systems\, including Windows\, Linux\, and MacO
 S. At the current stage\, it features modules to perform two-compenent (2C
 ) PIV\, stereoscpic PIV and optical camera calibration for multi-camera sy
 stems.  
 The processing of PIV and stereoscopic PIV data is based on a
 n iterative image deformation method\, which can be customized by the user
  varying different parameters in such a way to find the best compromise be
 tween accuracy and computational speed. These parameters include the size\
 , shape\, and number of interrogation windows\, the number of process iter
 ations\, and the type of interpolating functions for both image deformatio
 n and displacement interpolation (such as bilinear\, bicubic\, methods bas
 ed on simplexes or the FFT shift theorem\, and B-splines of varying orders
 ). Additionally\, it is possible to select a range of weighting windows fo
 r cross-correlation estimation and velocity field filtering\, including re
 ctangular\, Blackman\, Gaussian\, Harris\, Hann windows\, among others\, a
 nd several vector validation strategies for outlier detection and replacem
 ent. Such a level of customization enables to effectively adjust the modul
 ation transfer function of the PIV process to meet specific application re
 quirements. 
 For the stereoscopic PIV process two different approaches 
 are possible: mapping\, which involves applying PIV to de-warped images fo
 r 2D-2C displacement fields\, and warping\, which applies PIV to raw image
 s and combine 3C reconstruction and image dewarping in a single subsequent
  step. In order to accurately estimate the laser sheet plane location and 
 correct errors due to misalignment and inaccurate displacement vector posi
 tions\, a disparity correction procedure is also available.  
 The cali
 bration module (CalVi) supports accurate calibration with the camera model
 s mostly used in the PIV community: polynomials\, rational functions and t
 he pinhole camera model. Moreover\, it supports the integration of the pin
 hole camera model with a refractive correction model for cylindrical geome
 tries and camera calibration procedures working with unknown positions and
  orientations of the calibration target. In such a way\, the target may be
  moved by hand without losing accuracy in comparison with a conventional c
 alibration\, in which the target is displaced with the aid of translationa
 l and rotational stages and knowledge of the target positions is strictly 
 required. 
 In the present lecture\, students will be introduced to the 
 use of PaIRS-UniNa for processing PIV and SPIV images sets and calibrating
  camera systems in different optical configurations. The practical session
  will involve real experimental cases\, and students will learn how to fin
 d the optimal balance between computational speed and the accuracy of the 
 expected results through a fine tuning of the software parameters. 
 Bio
 graphy: Gerardo Paolillo received a Master's degree in Aerospace Engineeri
 ng and a PhD degree in Industrial Engineering from Università di Napoli \
 "Federico II\" in 2015 and 2018\, respectively. He is currently a Research
  Associate in the Department of Industrial Engineering at Università di N
 apoli \"Federico II\". His research interests lie in the area of experimen
 tal fluid mechanics\, with focus on applications of unsteady jets to flow 
 control and electronics cooling\, investigation into dynamics of turbulent
  Rayleigh-Bènard convection and development of 3D optical velocimetry tec
 hniques. 
 Please check our eligibility criteria before registering.
 
  
LOCATION:Sint-Genesius-Rode\, 1640 Flemish Brabant\, Belgium
DTSTART:20241017T133000Z
DTEND:20241017T151500Z
DTSTAMP:20220307T101637Z
ORGANIZER;CN=VKI Secretariat:MAILTO:secretariat@vki.ac.be
GEO:50.73507;4.396005
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Sint-Genesius-Rode\, 1640 F
 lemish Brabant\, Belgium;X-APPLE-RADIUS=72;X-TITLE=von Karman Institute fo
 r Fluid Dynamics:50.73507;4.396005
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