11. The image automatic annotation method according to claim 7 , wherein the first image, the second image, the image regions, and the annotations are represented by nodes in the graph, the graph is represented by an adjacency matrix, the links between the nodes are represented by the weights of the links in the graph, and a value of a corresponding weight represents 0 if there is no link between the nodes.
11. The image automatic annotation method according to claim 7 , wherein the first image, the second image, the image regions, and the annotations are represented by nodes in the graph, the graph is represented by an adjacency matrix, the links between the nodes are represented by the weights of the links in the graph, and a value of a corresponding weight represents 0 if there is no link between the nodes. 13. The image automatic annotation method according to claim 11 , further comprising: a step of applying normalization to the updated adjacency matrix before performing the annotation step based on the adjacency matrix subjected to the normalization.