Time to generate graphs

[han-liu]

Hi, I'm wondering how long it takes to generate one graph from probability map/ground truth map (e.g., for DRIVE dataset)? It seems to take quite a long time with the parameters provided in the paper. Thanks.

[syshin1014]

Hi, I can't remember how long it took exactly.
But, I remember it took a long time for a dense graph.
That's why I used the 'multiprocessing' module to generate multiple graphs from multiple prob. maps at the same time.
You can try to make a sparser graph by controlling the vertex sampling sparsity (in our paper) if it is ok to you.

[han-liu]

Thanks for the clarification. Here's another question. In the file make_graph_db.py line 133, can you clarify why the node labels as added as the node indices? I thought that would be binary value 0/1 obtained from the ground truth map. Thanks!

[syshin1014]

In the line, 'node_idx' is irrelevant with the label indicating whether it is vessel or not.
It's a general index for nodes in a graph, e.g. 0~N-1 for a graph having N nodes.