[Insight-users] ExtractImageFilter vs ExtractImageFilterCopyRegion vs ImageRegionSplitter

[jp]

Hello all

I would like to split some very large images into tiles  to generate a
multiresolution pyramid. In the process i would like to keep track of the
location and other parameters of the resulting single tiles.
The datasets are sizes of several 100 gb. Any of those fucntions mentioned
in the header  can be used for this task but i would like to know which one
would be the fastest and less memory intensive.

1.ImageRegionsplitter: can i specify exactly the coordinates where i want
the image to be split ? 
2. Does the extractimagefilter duplicate the image and then crop it ?
3. Does the ExtracImageFilterCopyRegion output a region or an image ? how do
i convert the region into an itkimage that can be saved to disk ? 


Thanks 
J-P





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