On feature normalization and data augmentation

Publikation: Bidrag til tidsskriftKonferenceartikelForskningfagfællebedømt

The moments (a.k.a., mean and standard deviation) of latent features are often removed as noise when training image recognition models, to increase stability and reduce training time. However, in the field of image generation, the moments play a much more central role. Studies have shown that the moments extracted from instance normalization and positional normalization can roughly capture style and shape information of an image. Instead of being discarded, these moments are instrumental to the generation process. In this paper we propose Moment Exchange, an implicit data augmentation method that encourages the model to utilize the moment information also for recognition models. Specifically, we replace the moments of the learned features of one training image by those of another, and also interpolate the target labels-forcing the model to extract training signal from the moments in addition to the normalized features. As our approach is fast, operates entirely in feature space, and mixes different signals than prior methods, one can effectively combine it with existing augmentation approaches. We demonstrate its efficacy across several recognition benchmark data sets where it improves the generalization capability of highly competitive baseline networks with remarkable consistency.

OriginalsprogEngelsk
TidsskriftProceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
Sider (fra-til)12378-12387
Antal sider10
ISSN1063-6919
DOI
StatusUdgivet - 2021
Eksternt udgivetJa
Begivenhed2021 IEEE/CVF Conference on Computer Vision and Pattern Recognition, CVPR 2021 - Virtual, Online, USA
Varighed: 19 jun. 202125 jun. 2021

Konference

Konference2021 IEEE/CVF Conference on Computer Vision and Pattern Recognition, CVPR 2021
LandUSA
ByVirtual, Online
Periode19/06/202125/06/2021

Bibliografisk note

Publisher Copyright:
© 2021 IEEE

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