Watch it in HD on Vimeo:
http://vimeo.com/26375991
PIV vortex ring from B. Thielicke on Vimeo.
Thursday, July 14, 2011
Thursday, July 7, 2011
PIVlab 1.2: Window deformation & streamlines
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:
Streamlines:
Processing low quality images:
The new code will be uploaded to MATLAB Central soon, I just have to do some final tests.
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:
Streamlines:
The new code will be uploaded to MATLAB Central soon, I just have to do some final tests.
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