1. Segmentation and preprocesing of electrical schematics using picture graphs;Bley;Comput. Vision Graph Image Process.,1984
2. On seeing things;Clowes;Artificial Intelligence,1971
3. A topology-based component extractor for understanding electronic circuit diagrams;Fahn;IEEE Trans. Pattern Anal. Machine Intell.,1989
4. Impossible objects as nonsense sentences;Huffman,1971
5. A duality concept for the analysis of polyhedral scenes;Huffman,1977