Authors:
Steffen Illium
;
Gretchen Griffin
;
Michael Kölle
;
Maximilian Zorn
;
Jonas Nüßlein
and
Claudia Linnhoff-Popien
Affiliation:
Institute of Informatics, LMU Munich, Oettingenstraße 67, Munich, Germany
Keyword(s):
Voronoi Patches, Information Transport, Image Classification, Data Augmentation, Deep Learning.
Abstract:
Overfitting is a problem in Convolutional Neural Networks (CNN) that causes poor generalization of models on unseen data. To remediate this problem, many new and diverse data augmentation (DA) methods have been proposed to supplement or generate more training data, and thereby increase its quality. In this work, we propose a new DA algorithm: VoronoiPatches (VP). We primarily utilize non-linear re-combination of information within an image, fragmenting and occluding small information patches. Unlike other DA methods, VP uses small convex polygon-shaped patches in a random layout to transport information around within an image. In our experiments, VP outperformed current DA methods regarding model variance and overfitting tendencies. We demonstrate DA utilizing non-linear re-combination of information within images, and non-orthogonal shapes and structures improves CNN model robustness on unseen data.