[Insight-users] How to create a set of spatially distributed images

[Ali -]

Hi,
 
I am trying to simulate an image like this:
 
http://ftp.sv.vt.edu/pub/projects97/pvlachos/pvlachos_project/images/piv.gif
 
which can be simplified as a set of particle-images with a Gaussian profile where the Gaussian parameters varies for every particle-image.
 
I started with creating small sized GaussianImageSource instances and pasting them at random positions on a background using PasteImageFilter. The problem is when two GaussianImageSource overlap as it can be seen in thios sample: http://img81.imageshack.us/my.php?image=testyz7.png
 
(1) Is there a better way than pasting to implement this?
 
(2) If not, how to get rid of the ovelaping problem?
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