[ITK-users] automated splitting and pasting of volumes for use in external programs

[Dr. Roman Grothausmann]

Dear mailing list members,


A dataset I work on is too big to load completely into itksnap for manual 
adjustment of the automatic pre-segementation with watersheds. The full 
resolution is needed, so I cannot work with a re-sampled version. The only 
possible easy solution I see at the moment is to split up the 3D image into 
smaller blocks of sizes as equal as possible, do the itsnap interaction, and 
finally paste all blocks of the resulting segmentation back together.
Would itkImageRegionSplitterMultidimensional be the right filter for the 
splitting of blocks as equal in size as possible?
Is there a "logger" like e.g. itkXMLFileOutputWindow (as used in 
itkStreamingImageFilterTest2.cxx) that could be used to store the regions 
corresponding to each block-file to use that for itkPasteImageFilter to combine 
these blocks later again?
Not needed now, but perhaps lager: Is there some nice way to handle overlaps in 
this case that is already implemented in itk, something like 
itkImageRegionSplitterMultidimensional::SetOverlap()?

Many thanks for any help or hints.
Roman

On 17/03/15 18:13, Pol Monsó Purtí wrote:
> I guess the way to go would be to take the splitter (probably
> ImageRegionSplitterMultidimensional now that I look at it) and extend it to
> support overlap. If I do it, I'll let you know in case it is of interest to
> anyone. For now I'll stick to my class.


-- 
Dr. Roman Grothausmann

Tomographie und Digitale Bildverarbeitung
Tomography and Digital Image Analysis

Institut für Funktionelle und Angewandte Anatomie, OE 4120
Medizinische Hochschule Hannover
Carl-Neuberg-Str. 1
D-30625 Hannover

Tel. +49 511 532-9574