论文标题
卷积嵌入使层次视觉变压器更强
Convolutional Embedding Makes Hierarchical Vision Transformer Stronger
论文作者
论文摘要
视觉变压器(VIT)最近在一系列计算机视觉任务中占主导地位,但它的训练数据效率低下,局部语义表示能力较低,而没有适当的电感偏差。卷积神经网络(CNNS)固有地捕获了区域感知语义,激发了研究人员将CNN引入VIT的架构中,以为VIT提供理想的电感偏见。但是,嵌入在VIT中的微型CNN实现的位置是否足够好?在本文中,我们通过深入探讨混合CNNS/VIT的宏观结构如何增强层次VIT的性能。特别是,我们研究了令牌嵌入层,别名卷积嵌入(CE)的作用,并系统地揭示了CE如何在VIT中注入所需的感应偏置。此外,我们将最佳CE配置应用于最近发布的4个最先进的VIT,从而有效地提高了相应的性能。最后,释放了一个有效的混合CNN/VIT家族,称为CETNET,可以用作通用的视力骨架。具体而言,CETNET在Imagenet-1K上获得了84.9%的TOP-1准确性(从头开始训练),可可基准上的48.6%的盒子地图和ADE20K上的51.6%MIOU,从而大大提高了相应的先进基本线的性能。
Vision Transformers (ViTs) have recently dominated a range of computer vision tasks, yet it suffers from low training data efficiency and inferior local semantic representation capability without appropriate inductive bias. Convolutional neural networks (CNNs) inherently capture regional-aware semantics, inspiring researchers to introduce CNNs back into the architecture of the ViTs to provide desirable inductive bias for ViTs. However, is the locality achieved by the micro-level CNNs embedded in ViTs good enough? In this paper, we investigate the problem by profoundly exploring how the macro architecture of the hybrid CNNs/ViTs enhances the performances of hierarchical ViTs. Particularly, we study the role of token embedding layers, alias convolutional embedding (CE), and systemically reveal how CE injects desirable inductive bias in ViTs. Besides, we apply the optimal CE configuration to 4 recently released state-of-the-art ViTs, effectively boosting the corresponding performances. Finally, a family of efficient hybrid CNNs/ViTs, dubbed CETNets, are released, which may serve as generic vision backbones. Specifically, CETNets achieve 84.9% Top-1 accuracy on ImageNet-1K (training from scratch), 48.6% box mAP on the COCO benchmark, and 51.6% mIoU on the ADE20K, substantially improving the performances of the corresponding state-of-the-art baselines.