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Title: Stochastic downsampling for cost-adjustable inference and improved regularization in convolutional networks
Authors: Kuen, Jason
Kong, Xiangfei
Lin, Zhe
Wang, Gang
Yin, Jianxiong
See, Simon
Tan, Yap-Peng
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Kuen, J., Kong, X., Lin, Z., Wang, G., Yin, J., See, S., & Tan, Y.-P. (2018). Stochastic downsampling for cost-adjustable inference and improved regularization in convolutional networks. 2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition, 7929-7938. doi:10.1109/CVPR.2018.00827
Abstract: It is desirable to train convolutional networks (CNNs) to run more efficiently during inference. In many cases however, the computational budget that the system has for inference cannot be known beforehand during training, or the inference budget is dependent on the changing real-time resource availability. Thus, it is inadequate to train just inference-efficient CNNs, whose inference costs are not adjustable and cannot adapt to varied inference budgets. We propose a novel approach for cost-adjustable inference in CNNs - Stochastic Downsampling Point (SDPoint). During training, SDPoint applies feature map downsampling to a random point in the layer hierarchy, with a random downsampling ratio. The different stochastic downsampling configurations known as SDPoint instances (of the same model) have computational costs different from each other, while being trained to minimize the same prediction loss. Sharing network parameters across different instances provides significant regularization boost. During inference, one may handpick a SDPoint instance that best fits the inference budget. The effectiveness of SDPoint, as both a cost-adjustable inference approach and a regularizer, is validated through extensive experiments on image classification.
ISBN: 978-1-5386-6420-9
DOI: 10.1109/CVPR.2018.00827
Rights: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, in any current or future media, including reprinting/republishing this material for adverstising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
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