[Paraview] Not understanding large memory use

[Mike Jackson]

I have a stack of images, Each image is 700x700 pixels and there are  
227 images in total. I used ITK to convert the gray scale images to a  
vtk StructuredGrid file using 8bit chars as the pixel type. Paraview  
can load the file with out a problem but when I try to use the "Clip"  
toolbar button paraview starts chewing up memory until there is no  
more and just crashes. I can use the "Cut" toolbar button and be just  
fine.

So I did some math and there are 111,230,000 pixels at 1 byte each.  
So that is roughly about 111MB to store the entire volume. If I Clip  
say half that volume wouldn't I just need an additional 50~60MB of  
memory to store the new dataset?

If someone could maybe enlighten me on what might be going on I would  
really appreciate the knowledge gained.


This is on a 2GB Ram MacBook Pro running OS X 10.4.8.

thanks
-- 
Mike Jackson   Senior Research Engineer
Innovative Management & Technology Services