The new PIVlab release supports an advanced correlation technique (I want to thank Kyle Lynch for the discussion about this). Using a multipass window deformation technique, significantly reduces noise in the data. The maximal vector resolution can also be increased and peak-locking is reduced a lot. PIV images that have a low quality can now be processed with higher precision (see the video at the bottom).
Additionally, it is possible to draw some streamlines and streamline rakes, this is useful for adding some qualitative information to the analyses.
The image export procedure has also been improved, it is possible to export the displayed result at any desired resolution (only limited by the RAM on your computer).
Standard direct cross-correlation (DCC) analysis using a 14*14px interrogation area with 50% overlap:
Multipass, window-deformation using a 6*6px interrogation area with 50% overlap in the final pass:
The new code will be uploaded to MATLAB Central soon, I just have to do some final tests.
|* userfriendly and GUI based PIV tool
* multi-pass, multi-grid window deformation technique
* import bmp/ tiff/ jpeg image pairs/ series
* multiple image sequencing styles
* individual image masking and region of interest
|* image pre-processing
* two different sub-pixel estimators
* multiple vector validation methods
* magnitude/ vorticity/ divergence/ shear / ...
* data smoothing, vector field highpass
* multiple colormaps
* extensive data extraction tools
* synthetic PIV image generator
* Many data export features
* main features accessible via comand line scripting