Dear All, I need to convert shape based image(graph_search2.jpg) into graph and then graph data structure. I have tried to filter the image and then with threshold, contour based approach access shapes(nodes), lines(edges) and arrows. but facing difficulty in getting relation b/w nodes and edges. Please help to find interest point(interest_points.jpg) and relation in node n edges. -- Thanks & Regards, -धन्यवाद Leena Chourey , लीना चौरे C-DAC Mumbai सी-डैक, मुम्बई