[gspr]

An image "is" not a matrix. Yes, the values of each pixel can be considered an entry of a matrix, but that's where the similarity ends. Unless the graph is very dense, doing convolutions on the image representing the graph is a pretty arbitrary thing to do. Graph CNNs exist and make a lot more sense in general.

[wenc]

I think the terminology may have been confusing here. I meant graphs in the sense of graphical plots, not graph theory graphs.

[gspr]

Ah, my bad.