论文标题
Adargcn:适应于几次学习的自适应聚合GCN
AdarGCN: Adaptive Aggregation GCN for Few-Shot Learning
论文作者
论文摘要
现有的少量学习(FSL)方法假设,有足够的培训样本,用于知识转移到目标类别的培训样本的培训样本,而培训样本很少。但是,这种假设通常是无效的,尤其是在细粒度识别方面。在这项工作中,我们定义了一种新的FSL设置,称为几乎没有Shot Shot学习(FSFSL),在该设置下,源和目标类别都具有有限的培训样本。为了克服源类数据稀缺问题,一种自然的选择是从网络上爬网图像,其中类名称为搜索关键字。但是,爬行的图像不可避免地被大量噪声(无关图像)损坏,因此可能会损害性能。为了解决此问题,我们提出了一个基于图形的卷积网络(GCN)标签denoising(LDN)方法,以删除无关的图像。此外,使用清洁的Web图像以及原始的清洁训练图像,我们提出了一种基于GCN的FSL方法。对于LDN和FSL任务,提出了一种新型的自适应聚合GCN(ADARGCN)模型,该模型与现有GCN模型不同,因为自适应聚集是基于多头多级聚合模块执行的。使用Adargcn,可以自动确定图形结构中每个图节点传播的信息和多远信息,从而减轻嘈杂和外向训练样本的影响。广泛的实验表明,在新的FSFSL和常规FSL设置下,我们的Adargcn的表现出色。
Existing few-shot learning (FSL) methods assume that there exist sufficient training samples from source classes for knowledge transfer to target classes with few training samples. However, this assumption is often invalid, especially when it comes to fine-grained recognition. In this work, we define a new FSL setting termed few-shot fewshot learning (FSFSL), under which both the source and target classes have limited training samples. To overcome the source class data scarcity problem, a natural option is to crawl images from the web with class names as search keywords. However, the crawled images are inevitably corrupted by large amount of noise (irrelevant images) and thus may harm the performance. To address this problem, we propose a graph convolutional network (GCN)-based label denoising (LDN) method to remove the irrelevant images. Further, with the cleaned web images as well as the original clean training images, we propose a GCN-based FSL method. For both the LDN and FSL tasks, a novel adaptive aggregation GCN (AdarGCN) model is proposed, which differs from existing GCN models in that adaptive aggregation is performed based on a multi-head multi-level aggregation module. With AdarGCN, how much and how far information carried by each graph node is propagated in the graph structure can be determined automatically, therefore alleviating the effects of both noisy and outlying training samples. Extensive experiments show the superior performance of our AdarGCN under both the new FSFSL and the conventional FSL settings.