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<div>Have you tried segmentation tools in 3D Slicer? There is a multi-label watershed segmentation tool that works in 3d (<a href="http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/Modules/Editor#WatershedFromMarkers" target="_parent">http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/Modules/Editor#WatershedFromMarkers</a>),
there are also a number of other generic semi-automatic segmentation tools (such as GrowCut) and a few fully-automatic specialized tools (for brain, airways, etc). Download the nightly build and also checkout the Segmentation category in the Extension Manager.</div>
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<div>Andras<br>
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<div><font face=" 'Calibri', 'Segoe UI', 'Meiryo', 'Microsoft YaHei UI', 'Microsoft JhengHei UI', 'Malgun Gothic', 'sans-serif'" style="line-height: 15pt; letter-spacing: 0.02em; font-family: "Calibri", "Segoe UI", "Meiryo", "Microsoft YaHei UI", "Microsoft JhengHei UI", "Malgun Gothic", "sans-serif"; font-size: 12pt;"><b>From:</b> <a href="mailto:grothausmann.roman@mh-hannover.de" target="_parent">Dr.
Roman Grothausmann</a><br>
<b>Sent:</b> ýMondayý, ýAugustý ý11ý, ý2014 ý1ý:ý15ý ýAM<br>
<b>To:</b> <a href="mailto:itksnap-users@googlegroups.com" target="_parent">itksnap-users@googlegroups.com</a><br>
<b>Cc:</b> <a href="mailto:insight-users@itk.org" target="_parent">ITK Mailing List</a></font></div>
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<div id="readingPaneBodyContent">Dear mailing list members,<br>
<br>
<br>
For a long time now I've been searching for a replacement of the old <br>
SegmentationEditor (part of the InsightApplications) which I could not get to <br>
work even with older ITK-3.x. Somewhere I was told that it was integrated and <br>
maintained within itksnap. However the only tool in itksnap based on watershed <br>
segmentation seems to be the adaptive brush. It is very handy, but <br>
time-consuming in 3D and only for local segmentations. In contrast the <br>
SegmentationEditor used a global hierarchical watershed segmentation to pick <br>
labels from, see e.g. the video linked here:<br>
http://www.insight-journal.org/browse/publication/70<br>
Quite often now I've stumbled over data, that would likely have profited a lot <br>
of such a tool for segmentation.<br>
<br>
If such a tool working with ITK-4.x does not exist any more, I thought of <br>
implementing it as a global WS segmentation mode in itksnap. That way making the <br>
tool easier to find, to use and to ensure maintenance (should it be integrated <br>
into the itksnap code base in the end) and also avoiding recoding a GUI with <br>
mouse interaction and such.<br>
<br>
My current idea is to start, similar to the snake-tool, with pre-filtering like <br>
smoothing and optional edge-detection.<br>
Then the main edit mode to consist of the usual 4 subwindows showing an overlay <br>
of the grey-image and the watershed segmentation of the hierarchical WS-filter <br>
(hWS), side-by-side to another label-dataset (loaded like a tiled overlay) which <br>
consist of the actually chosen labels from the hWS as the final data (FD).<br>
The interaction I'm considering would be to LMB click on a label in the hWS <br>
which is then added to the FD as the current fg label, or removed with a RMB. <br>
The hierachrchy level of the hWS could be controlled by a slider or the mouse <br>
wheel + Shift in nearly real time if some region demands higher or lower <br>
detailed segmentation. When the fg label is changed, the segmentation added or <br>
removed with further mouse interactions would modify the new fg label.<br>
When all is done and the global WS mode is left, the FD label-dataset is added <br>
to the main segmentation of itksnap.<br>
<br>
Would that be possible to implement in itksnap 3.x?<br>
What source files of the itksnap code base should I look at for:<br>
- the pre-filtering mode of the snake (for the smoothing and edge detection)<br>
- the mouse interactions (for e.g. adding the whell + Shift interaction)<br>
- possible examples for the dual layout<br>
<br>
Thanks for any comments, help or hints.<br>
Roman<br>
<br>
-- <br>
Dr. Roman Grothausmann<br>
<br>
Tomographie und Digitale Bildverarbeitung<br>
Tomography and Digital Image Analysis<br>
<br>
Institut für Funktionelle und Angewandte Anatomie, OE 4120<br>
Medizinische Hochschule Hannover<br>
Carl-Neuberg-Str. 1<br>
D-30625 Hannover<br>
<br>
Tel. +49 511 532-9574<br>
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