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Deep Network Classification by Scattering and Homotopy Dictionary Learning

Abstract : We introduce a sparse scattering deep convolutional neural network, which provides a simple model to analyze properties of deep representation learning for classification. Learning a single dictionary matrix with a classifier yields a higher classification accuracy than AlexNet over the ImageNet 2012 dataset. The network first applies a scattering transform that linearizes variabilities due to geometric transformations such as translations and small deformations. A sparse l1 dictionary coding reduces intra-class variability while preserving class separation through projections over unions of linear spaces. It is implemented in a deep convolutional network with a homotopy algorithm having an exponential convergence. A convergence proof is given in a general framework that includes ALISTA. Classification results are analyzed on ImageNet.
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https://hal.inria.fr/hal-02976813
Contributor : John Zarka <>
Submitted on : Friday, October 23, 2020 - 4:20:09 PM
Last modification on : Wednesday, October 28, 2020 - 3:36:10 AM

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John Zarka, Louis Thiry, Tomás Angles, Stephane Mallat. Deep Network Classification by Scattering and Homotopy Dictionary Learning. ICLR 2020 - 8th International Conference on Learning Representations, Apr 2020, Addis Ababa / Virtual, Ethiopia. ⟨hal-02976813⟩

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