Julien Lerouge

Julien Lerouge

Senior Data Scientist @ QuickSign
  • Deep learning
  • Image processing
  • Document analysis & understanding (classification, OCR, NLP)


GEM++: A Tool for Solving Substitution-Tolerant Subgraph Isomorphism

1Normandie Université, LITIS EA 4108, University of Rouen, 76801, Saint-Etienne du Rouvray, France
2H. Milton Stewart School of Industrial and Systems Engineering, Georgia Institute of Technology, 765 Ferst Drive NW, Atlanta, 30332, USA

Abstract :

The substitution-tolerant subgraph isomorphism is a particular error-tolerant subgraph matching that allows label substitutions for both vertices and edges. Such a matching is often required in pattern recognition applications since graphs extracted from images are generally labeled with features vectors computed from raw data which are naturally subject to noise. This paper describes an extended version of a Binary Linear Program (BLP) for solving this class of graph matching problem. The paper also presents GEM++, a software framework that implements the BLP and that we have made available for the research community. GEM++ allows the processing of different sub-problems (induced isomorphism or not, directed graphs or not) with complex labelling of vertices and edges. We also present some datasets available for evaluating future contributions in this field.