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

[Matt McCormick]

Hi Roman,

You probably want to use the streaming capabilities of the ITK
pipeline.  This is covered in more detailed in the ITK Software Guide.
The pipeline internally uses ImageRegionSplitter classes. Overlaps are
handled by propagation of the RequestedRegion throughout the pipeline.
To monitor the changes in the regions, use the
PipelineMonitorImageFilter [1].

HTH,
Matt

[1] http://www.itk.org/Doxygen/html/classitk_1_1PipelineMonitorImageFilter.html

On Mon, Mar 30, 2015 at 5:25 AM, Dr. Roman Grothausmann
<grothausmann.roman at mh-hannover.de> wrote:
> 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
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