Abstract
Both data access and data acquisition have become increasingly easy over the past decade, leading to rapid developments in many areas of intelligent information processing. In many cases, the underlying data is complex, making vectorial structures rather inappropriate for data representation. In these cases graphs provide a versatile alternative to purely numerical approaches. Regardless the representation formalism actually used, it is inevitable for supervised pattern recognition algorithms to have access to large sets of labeled training samples. In some cases, however, this requirement cannot be met because the set of labeled samples is inherently limited. In a recent research project a novel encoding of pairwise graph matchings is introduced. The basic idea of this encoding is to formalize the stable cores of pairs of patterns by means of graphs, termed matching-graphs. In the present paper we propose a novel scenario for the use of these matching-graphs. That is, we employ them to enlarge small training sets of graphs in order to stabilize the training of a classifier. In an experimental evaluation on four graph data sets we show that this novel augmentation technique improves the classification accuracy of an SVM classifier with statistical significance.
Supported by Swiss National Science Foundation (SNSF) Project Nr. 200021\(\_\)188496.
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Notes
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The statistical significance is computed via Z-test using a significance level of \(\alpha = 0.05\).
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Fuchs, M., Riesen, K. (2022). Augment Small Training Sets Using Matching-Graphs. In: El Yacoubi, M., Granger, E., Yuen, P.C., Pal, U., Vincent, N. (eds) Pattern Recognition and Artificial Intelligence. ICPRAI 2022. Lecture Notes in Computer Science, vol 13364. Springer, Cham. https://doi.org/10.1007/978-3-031-09282-4_29
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