[Insight-users] Speed

[Gib Bogle]

I've tried BoxMeanImageFilter (which I note was contributed by Richard Beare). 
Indeed it is much faster, in fact it took just 43 sec for my test image - a bit 
more than twice as fast as my code.  It uses all the CPU cores.  It also uses a 
lot of memory, and when I try a test with an image of twice the size (200 frames 
instead of 100) I'm told "This application has requested the Runtime to 
terminate it in an unusual way."  I think it runs out of memory (I have only 4GB 
in this machine).  I guess each thread is requesting a big chunk of memory.

I'm intrigued by the way these ITK filters automatically utilize multiple 
processors, and I'm wondering if there is a way to set the number of threads 
that will be invoked.  No doubt there's an IJ article on this topic ..