About Site Map Submit Contact Us Log in | Create an account
Create an account Log In
Average Rating
User Rating:
Visitors Rating:
My rating:

Write review
See full specifications

scripts default iconPost-processing of PIV data (Scripts) Publisher's description

[Vx2,Vy2] = PPPIV(Vx1,Vy1) carries out robust post-processing of 2-D PIV velocity data

[Vx2,Vy2] = PPPIV(Vx1,Vy1) carries out robust post-processing of 2-D PIV velocity data. Vx1 and Vy1 must be two matrices of same size that contain the x- and y-components of the velocities at equally spaced points in the Cartesian plane.

PPPIV uses a robust penalized least squares method that makes the smoothed output (Vx2,Vy2) no dependent upon the outlying (spurious) vectors: outliers are replaced and velocity vectors are smoothed using a single automated process.

MISSING DATA: Non finite (NaN or Inf) values in (Vx1,Vy1) are considered as missing velocities. The algorithm replaces them automatically.

PPPIV uses SMOOTHN. See SMOOTHN for more details:

[Vx2,Vy2] = PPPIV(Vx1,Vy1,ROI) post-processes (Vx1,Vy1) in the region of interest defined by the binary matrix ROI: 1 => inside the region of interest, 0 => outside (i.e. masked data).

By default, PPPIV selects the smoothing parameter automatically by minimizing the GCV score (see reference #1 for details). Alternatively, the amount of smoothing can be somewhat adjusted by adding one of the three smoothing options:
[...] = PPPIV(Vx1,Vy1,OPTION) or [...] = PPPIV(Vx1,Vy1,ROI,OPTION)
The available options are:
'2x2' - weak smoothing
'3x3' - medium smoothing
'nosmoothing' - extremely weak smoothing

PPPIV (no input/output argument) runs one example.

Enter 'help pppiv' for more details.

1) Garcia D, Robust smoothing of gridded data in one and higher dimensions with missing values. Computational Statistics & Data Analysis, 2010;54:1167-1178.
2) Garcia D, A fast all-in-one method for post-processing of PIV data. Exp in Fluids, 2010; accepted pending revision.

System Requirements:

MATLAB 7.7 (R2008b)
Program Release Status: New Release
Program Install Support: Install and Uninstall

Post-processing of PIV data (Scripts) Tags:

Click on a tag to find related softwares

Is Post-processing of PIV data (Scripts) your software?

Manage your software

Most Popular

scripts default icon ASK, OOK, FSK, BPSK, QPSK, 8PSK modulation 1.1
ASK, OOK, FSK, BPSK, QPSK, 8PSK modulation contain several functions for digital modulation simulation
scripts default icon Simulink Communication Labs 1.1
Simulink Communication Labs allows you to learn communication systems in greater depth.
scripts default icon M-QAM modulation and demodulation 1.1
M-QAM modulation and demodulation is the QAM modulation and demodulation tech.
scripts default icon LZW Compression/Decompression 1.1
LZW Compression/Decompression - Updated LZW compressor and decompressor with reasonable performance
scripts default icon InSPIRE utility to plot a 2D displacement field (Scripts) 1.0
This program plots the deformation field (displace vectors) contained in vector.txt.