# Skel2Graph 3D

Version 1.22.0.1 (9,34 KB) von
Calculate the network graph of a 3D voxel skeleton.
Aktualisiert 5. Dez 2018

MATLAB code to derive the network graph of a 3D voxel skeleton

This function converts a 3D binary voxel skeleton into a network graph described by nodes and edges. The input is a 3D binary image containing a one-dimensional voxel skeleton, generated e.g. using the "Skeleton3D" thinning function available on MFEX. The output is the adjacency matrix of the graph, and the nodes and links of the network as MATLAB structure.

Usage:

where "skel" is the input 3D binary image, and "THR" is a threshold for the minimum length of branches, to filter out skeletonization artifacts.

A is the adjacency matrix with the length of the links as matrix entries, and node/link are the structures describing node and link properties.

A node has the following properties:

- idx List of voxel indices of this node
- links List of links connected to this node
- conn List of destinations of links of this node
- comX,comY,comZ Center of mass of all voxels of this node
- ep 1 if node is endpoint (degree 1), 0 otherwise

A link has the following properties:

- n1 Node where link starts
- n2 Node where link ends
- point List of voxel indices of this link

A second function, "Graph2Skel3D.m", converts the network graph back into a cleaned-up voxel skeleton image.

An example of how to use these functions is given in the script "Test_Skel2Graph3D.m", including a test image. In this example, it is also demonstrated how to iteratively combine both conversion functions in order to obtain a completely cleaned skeleton graph.

Any comments, corrections or suggestions are highly welcome. If you include this in your own work, please cite our publicaton [1].

Philip Kollmannsberger 09/2013, 01/2016
philipk@gmx.net

[1] Kollmannsberger, Kerschnitzki et al.,
"The small world of osteocytes: connectomics of the lacuno-canalicular network in bone."
New Journal of Physics 19:073019, 2017.

### Zitieren als

Kollmannsberger, Kerschnitzki et al., "The small world of osteocytes: connectomics of the lacuno-canalicular network in bone." New Journal of Physics 19:073019, 2017.

##### Kompatibilität der MATLAB-Version
Erstellt mit R2010b
Kompatibel mit allen Versionen
##### Plattform-Kompatibilität
Windows macOS Linux
##### Kategorien
Mehr zu 2-D and 3-D Plots finden Sie in Help Center und MATLAB Answers
##### Quellenangaben

Inspiriert von: Skeleton3D

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Versionen, die den GitHub-Standardzweig verwenden, können nicht heruntergeladen werden

Version Veröffentlicht Versionshinweise
1.22.0.1

updated description

1.22.0.0

1.21.0.0

1.2.0.0

Fixed typo
fixed typo
- zero padding added, outermost layer is now included
- branch ends are included as 1-nodes
- added documentation of the node/link structure
- more intuitive test script, removed bugs (infinite loops)

1.1.0.0

Function returned an error if the skeleton volume was not padded with zeros. This is now corrected.

1.0.0.0

Um Probleme in diesem GitHub Add-On anzuzeigen oder zu melden, besuchen Sie das GitHub Repository.
Um Probleme in diesem GitHub Add-On anzuzeigen oder zu melden, besuchen Sie das GitHub Repository.