Archive for the ‘Tomography’ Category

Large Data Sets and 3D Gaussian

Friday, April 17th, 2009

Firstly a small fix:

In the post about the 2D gaussian there was a typo:

f(2,2) = Ae^{-(\frac{2^2+2^2}{1.4^2})}

should read

f(2,2) = Ae^{-(\frac{2^2+2^2}{2(1.4^2)})}  

this has now been fixed in the original article.

 

Last night I successfully made my 2048*2048*2048 * 2 bytes data set. The random data was generated using the mersenne twister algorithm with a fixed seed so I can recreate it later if needed. I also created a smaller set of 512×512x512 in order to interactively test my kernels.

(more…)

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Posted in CUDA, Development, Maths, Tomography | No Comments »

Data Sets

Thursday, January 15th, 2009

After complaining in my last post about not being able to find freely available real world data sets for tomography I managed to find the following sites:

http://www.volvis.org/

http://www.cg.tuwien.ac.at/xmas/

http://radiology.uiowa.edu/downloads/

I’ve only downloaded one set so far and haven’t had a chance to look at it but from the thumbnails on the sites they look good. The Christmas tree model in particular looks like a lot of fun to work on and as a bonus it is huge.

Posted in Tomography | No Comments »