IEEE Transactions on Pattern Analysis and Machine Intelligence
Symbol Recognition: Current Advances and Perspectives
GREC '01 Selected Papers from the Fourth International Workshop on Graphics Recognition Algorithms and Applications
Prototyping Structural Descriptions: An Inductive Learning Approach
SSPR '98/SPR '98 Proceedings of the Joint IAPR International Workshops on Advances in Pattern Recognition
Indexing of Technical Line Drawings Based on F-Signatures
ICDAR '01 Proceedings of the Sixth International Conference on Document Analysis and Recognition
Extraction, layout analysis and classification of diagrams in PDF documents
ICDAR '03 Proceedings of the Seventh International Conference on Document Analysis and Recognition - Volume 2
Digital Geometry: Geometric Methods for Digital Picture Analysis
Digital Geometry: Geometric Methods for Digital Picture Analysis
Document zone content classification and its performance evaluation
Pattern Recognition
An interactive example-driven approach to graphics recognition in engineering drawings
International Journal on Document Analysis and Recognition
Digital Straight Line Segments
IEEE Transactions on Computers
Image classification by a two-dimensional hidden Markov model
IEEE Transactions on Signal Processing
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A novel technique for vectorization of engineering drawings is presented. The novelty of the algorithm lies in exploiting certain digital-geometric properties of straightness to vectorize inclined line segments and curve segments after vectorizing the horizontal and the vertical pieces using the conventional morphological opening. The primitives, hence vectorized, are classified into (i) horizontal, (ii) vertical, (iii) inclined line segments, and (iv) curved segments. Such a classification expedites the reconstruction of an engineering drawing from the vector format. Experimental results on several benchmark datasets have been given to demonstrate its efficiency and elegance.