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-   -   grid generation - photogrammetry (http://www.cfd-online.com/Forums/main/2378-grid-generation-photogrammetry.html)

Michael Sippel July 17, 2000 15:53

grid generation - photogrammetry
 
Hi,

has anyone tested the combination of photogrammetric data (recognition/extraction of three dimensional objects) with methods of 3d-grid generation (i.e. for simulation of airflow around buildings ...)?

Thanks

Any comments will be appreciated

Michael


Kai Kang July 18, 2000 09:26

Re: grid generation - photogrammetry
 
this has been a very active subject in medical imaging field, you may want to check into that. People are trying to extract 3D info. from MRI/CT images to construct 3D FEA models...

Ed July 18, 2000 13:29

Re: grid generation - photogrammetry
 
CFD-MICROMESH from www.cfdrc.com can read a 2-d image format (and many others), recognize features, then allow you to extrude each feature according to a variety of specifications....then it automatically generates the 3-d mesh. It does some other things too. It was originally designed for MEMS applications, but is not restricted in any way to small scales. I've seen a picture of a MICROMESH-generated model of the Washington DC area. Go to cfdrc.com -> search -> micromesh.

Robert Schneiders July 19, 2000 04:01

Re: grid generation - photogrammetry
 
Michael,

take a look at the following paper:

From Medical Images to CFD Meshes Cebral, J.R. and Rainald Lohner Proceedings, 8th International Meshing Roundtable, South Lake Tahoe, CA, U.S.A., pp.321-331, October 1999

http://www.andrew.cmu.edu/user/sowen...cts/Ce704.html

Best regards,

Robert

Dr. Robert Schneiders MAGMA Giessereitechnologie GmbH D-52072 Aachen Kackertstr. 11 Germany Tel.: +49-241-88901-13 email: R.Schneiders@magmasoft.de www: http://www-users.informatik.rwth-aachen.de/~roberts/



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