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arXiv 2202.02777cs.CVcs.LG
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使用无参数层学习特征

Learning Features with Parameter-Free Layers

NAVER AI Lab(NAVER人工智能实验室);NAVER CLOVA

Dongyoon Han, YoungJoon Yoo, Beomyoung Kim, Byeongho Heo

摘要:

卷积构建块等可训练层是标准的网络设计选择,通过学习参数来通过连续的空间操作捕获全局上下文。当设计一个高效的网络时,可训练层(如dependencyconvolution)是参数和FLOP数量的效率来源,但实际上模型速度几乎没有提高。本文认为,简单的内置无参数操作可以是替代网络架构中空间操作的高效可训练层的有利替代方案。我们的目标是打破将构建块的空间操作组织成可训练层的刻板印象。提供了基于层级研究的广泛实验分析,其中包括完全训练的模型和神经架构搜索,以研究无参数操作(如最大池)是否有效。这些研究最终为我们重新设计网络架构提供了一个简单而有效的想法,其中无参数操作被大量用作主要构建模块,而不会牺牲模型的准确性。ImageNet数据集上的实验结果表明,具有无参数操作的网络架构可以在模型速度,参数数量和FLOP方面享有更高的效率。Code和ImageNet预训练模型可在https://github.com/naver-ai/PfLayer上获得。

英文摘要:

Trainable layers such as convolutional building blocks are the standard network design choices by learning parameters to capture the global context through successive spatial operations. When designing an efficient network, trainable layers such as the depthwise convolution is the source of efficiency in the number of parameters and FLOPs, but there was little improvement to the model speed in practice. This paper argues that simple built-in parameter-free operations can be a favorable alternative to the efficient trainable layers replacing spatial operations in a network architecture. We aim to break the stereotype of organizing the spatial operations of building blocks into trainable layers. Extensive experimental analyses based on layer-level studies with fully-trained models and neural architecture searches are provided to investigate whether parameter-free operations such as the max-pool are functional. The studies eventually give us a simple yet effective idea for redesigning network architectures, where the parameter-free operations are heavily used as the main building block without sacrificing the model accuracy as much. Experimental results on the ImageNet dataset demonstrate that the network architectures with parameter-free operations could enjoy the advantages of further efficiency in terms of model speed, the number of the parameters, and FLOPs. Code and ImageNet pretrained models are available at https://github.com/naver-ai/PfLayer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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