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Werner Baumgarten and Marcus J. B. Hauser
The plasmodium of the slime mould Physarum polycephalum forms an extended and complex two-dimensional vein network that is used to transport protoplasm through the giant cell. To obtain insights into the topology of this vein network, its graph structure needs to be extracted from experimental images. This amounts to the task of extracting and reconstructing very tiny venules (elements) from an image that covers a relatively huge area. A protocol containing a sequence of image processing and correction steps that allows a highly accurate detection and extraction of the underlying graph has been developed and is described in detail. The analysis of the extracted data reveals that the veins and venules of the plasmodium of P. polycephalum form a regular, cubic graph.
Real world network, regular graph, Physarum polycephalum, data extraction.
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