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Monthly Archives: January 2006
We call all our users, who upgraded his Matlab version to R14SP1+ (i.e. SP1, SP2 or SP3, see Mathworks web site for more details) to upgrade his URAPIV.M from the download site: http://sourceforge.net/projects/matlabpiv
URAPIV.M is now a self-inclusive function, that contains all the necessary utility functions (ReadImdir() and QuiverM()) inside, sharing the variables without calls-by-reference. Moreover, ReadImDir() is updated to read more image formats: JPEG, TIFF, BMP (and can easily be extended for more formats) and also reads sequential lists (from High-frame-rate PIV or high-speed PIV or cinematographic PIV) and also from cross-correlation cameras (a usual _b.xxx and _c.xxx convention for the base and cross frames).
During the last year we have been astonished to discover two cases of improper (to our point of view) use of our names by scientific researchers that try to publish a comparative studies, interesting in promotion of their algorithms. Instead of comparing algorithms (i.e. cross-correlation versus error correlation, etc.) they had compared their packages (’XXX’,'YYY’) versus URAPIV and come (naturally :-)) to the conclusion of their advanced performance of a PIV analysis.
It is all nice, but we do not want that others will use it this way. Moreover, we always help our users with the support, tips and suggestions that lead to high-quality scientific research and publications. Therefore, we decided to try to protect our reputation by a “proper” license for URAPIV. We have adopted the BSD- type license (http://www.opensource.org):
The origin of URAPIV is a successful implementation of a Particle Image Velocimetry algorithm in Matlab (it requires Image and Signal Processing Toolboxes). The experiments have been performed in an air impinging jet flow. The experimental system consisted of a double Nd:YAG laser (Quantel, 160 mJ/pulse) and the MegaPixel CCD camera (Kodak ES 1.0).
See some more detailed information on the PROJECTS page, and the full story is available in the Proceedings of the 3rd International Workshop on Particle Image Velocimetry, Santa Barbara, California, September 16-18, 1999. The paper is titled “Computation of Pressure Distribution Using PIV Velocity Data”. Another, more recent publication is in the proceedings of PIV’01 symposium, and you can download the draft version from in the PDF format [here]
The original code was developed by a research group at the Faculty of Agricultural Engineering, Technion–Israel Institute of Technology. The code is a free, open source software, which means mostly NO WARRANTY, covered by a BSD-type license, and distributed for free upon a simple e-mail request. Please, feel free to ask for the software package, and/or some technical help from Dr. Roi Gurka or Dr. Alex Liberzon.
Welcome to URAPIV.WORDPRESS.COM. This is our first post under an excellent WordPress platform. Please, update your bookmarks, we intend to join here both URAPIV.TRIPOD.COM and the downloading site SourceForge.Net
