I have doodled sketches of graphs in JPG format (they roughly look like stick men, in particular the vertices are not shown - they should be where the lines meet) and want to convert them into proper graphs in Mathematica.
Note that I am not concerned about the direction of edges, the graph structure is what matters, not the orientation of the edges or their coordinates; as long as I get a graph that's isomorphic to the sketched graph, that would be fine for me).
What can I do? Any help is welcome! TIA!
This is an example of a sketch that I want Mathematica to turn into a graph
When the sketches are a bit more rough with thicker edges, then kglr's (original) approach does not seem to work. I attached another figure. Note that this at first was ONLY the lines with a blank interior. I actually used a paint program to fill the inner part with black, but it did not work accurately, which makes everything more difficult, I guess. Is there anything I can do about this?