1 Graph Matching Using a Direct Classi�cation of Node Attendance

An algorithm has been developed that �nds isomorphisms between both graphs and subgraphs. The development is introduced in the object recognition problem domain. The method isolates matching subgraphs, �nds a node-to-node mapping and reorders nodes thus permitting a direct comparison to be made between the resultant graphs. The algorithm is of polynomial order. It yields approximate results, maintaining a performance level for subgraph isomorphisms at or above 95 % under a wide variety of conditions and with varying levels of noise. The performance on the full size comparisons associated w i t h g r aph isomorphisms has been found to be 100/100, also under a variety of conditions. Performance metrics, methods of testing and results are p r esented