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Authors: Bernhard Bermeitinger ; Tomas Hrycej and Siegfried Handschuh

Affiliation: Institute of Computer Science, University of St.Gallen (HSG), St.Gallen, Switzerland

Keyword(s): Residual Connection, Deep Neural Network, Shallow Neural Network, Computer Vision, Image Classification, Convolutional Networks.

Abstract: Deep neural networks have a good success record and are thus viewed as the best architecture choice for complex applications. Their main shortcoming has been, for a long time, the vanishing gradient which prevented the numerical optimization algorithms from acceptable convergence. An important special case of network architecture, frequently used in computer vision applications, consists of using a stack of layers of the same dimension. For this architecture, a breakthrough has been achieved by the concept of residual connections—an identity mapping parallel to a conventional layer. This concept substantially alleviates the vanishing gradient problem and is thus widely used. The focus of this paper is to show the possibility of substituting the deep stack of residual layers with a shallow architecture with comparable expressive power and similarly good convergence properties. A stack of residual layers can be expressed as an expansion of terms similar to the Taylor expansion. This ex pansion suggests the possibility of truncating the higher-order terms and receiving an architecture consisting of a single broad layer composed of all initially stacked layers in parallel. In other words, a sequential deep architecture is substituted by a parallel shallow one. Prompted by this theory, we investigated the performance capabilities of the parallel architecture in comparison to the sequential one. The computer vision datasets MNIST and CIFAR10 were used to train both architectures for a total of 6,912 combinations of varying numbers of convolutional layers, numbers of filters, kernel sizes, and other meta parameters. Our findings demonstrate a surprising equivalence between the deep (sequential) and shallow (parallel) architectures. Both layouts produced similar results in terms of training and validation set loss. This discovery implies that a wide, shallow architecture can potentially replace a deep network without sacrificing performance. Such substitution has the potential to simplify network architectures, improve optimization efficiency, and accelerate the training process. (More)

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Paper citation in several formats:
Bermeitinger, B.; Hrycej, T. and Handschuh, S. (2023). Make Deep Networks Shallow Again. In Proceedings of the 15th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management - KDIR; ISBN 978-989-758-671-2; ISSN 2184-3228, SciTePress, pages 339-346. DOI: 10.5220/0012203800003598

@conference{kdir23,
author={Bernhard Bermeitinger. and Tomas Hrycej. and Siegfried Handschuh.},
title={Make Deep Networks Shallow Again},
booktitle={Proceedings of the 15th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management - KDIR},
year={2023},
pages={339-346},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012203800003598},
isbn={978-989-758-671-2},
issn={2184-3228},
}

TY - CONF

JO - Proceedings of the 15th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management - KDIR
TI - Make Deep Networks Shallow Again
SN - 978-989-758-671-2
IS - 2184-3228
AU - Bermeitinger, B.
AU - Hrycej, T.
AU - Handschuh, S.
PY - 2023
SP - 339
EP - 346
DO - 10.5220/0012203800003598
PB - SciTePress