QuickDiagram: a system for online sketching and understanding of diagrams

Authors:
Liu Wenyin;Xiangfei Kong;Yiming Wang;Chester Wan;Cheuk-Yin Ho;Tong Lu;Zhengxing Sun
Affiliations:
State Key Lab. for Novel Software Technology, Nanjing University, Nanjing, China and Department of Computer Science, City University of Hong Kong, Hong Kong SAR, PR China;Department of Computer Science, City University of Hong Kong, Hong Kong SAR, PR China;State Key Lab. for Novel Software Technology, Nanjing University, Nanjing, China;Department of Computer Science, City University of Hong Kong, Hong Kong SAR, PR China;Department of Computer Science, City University of Hong Kong, Hong Kong SAR, PR China;State Key Lab. for Novel Software Technology, Nanjing University, Nanjing, China;State Key Lab. for Novel Software Technology, Nanjing University, Nanjing, China
Venue:
GREC'09 Proceedings of the 8th international conference on Graphics recognition: achievements, challenges, and evolution
Year:
2009

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Abstract

In this paper, a system named QuickDiagram is proposed for quick diagram input and understanding. With a user sketching a (complete or partial) component/symbol or a wire (connecting two components) of the diagram, the system can recognize and beautify it immediately. After the entire diagram is finished, certain understandings can be obtained. Especially, the following two methods are used to interpret the recognized diagram: 1) Nodal Analysis on resistive circuits, and 2) generation of PSpice codes from the recognized diagrams. Experiments on a few sketched circuit diagrams show that the results are robust and accurate for both recognition and understanding.