论文标题
上下文化可以增强基于梯度的元学习
Contextualizing Enhances Gradient Based Meta Learning
论文作者
论文摘要
元学习方法已应用于少数射击分类问题时成功,其中它们很快适应了少数标记的示例。在这种情况下,原型表示,每个代表特定类别都特别重要,因为它们提供了一种紧凑的形式来传达从标记的示例中学到的信息。但是,这些原型只是代表此信息的一种方法,它们的范围和对看不见的例子进行分类的能力狭窄。我们提出了上下文化器的实施,这些原型是适应给定示例并在基于梯度的模型的分类中起更大作用的可推广原型。我们演示了如何为元学习方法配备上下文化的人,并表明它们的使用可以显着提高少数射击学习数据集的性能。我们还提供了优点的数字,证明了上下文化的潜在优势,并分析了模型如何利用它们。我们的方法尤其适合低数据环境,在这种情况下,很难在不拟合过度的情况下更新参数。我们的实施和重现实验的说明可在https://github.com/naveace/proto-context上获得。
Meta learning methods have found success when applied to few shot classification problems, in which they quickly adapt to a small number of labeled examples. Prototypical representations, each representing a particular class, have been of particular importance in this setting, as they provide a compact form to convey information learned from the labeled examples. However, these prototypes are just one method of representing this information, and they are narrow in their scope and ability to classify unseen examples. We propose the implementation of contextualizers, which are generalizable prototypes that adapt to given examples and play a larger role in classification for gradient-based models. We demonstrate how to equip meta learning methods with contextualizers and show that their use can significantly boost performance on a range of few shot learning datasets. We also present figures of merit demonstrating the potential benefits of contextualizers, along with analysis of how models make use of them. Our approach is particularly apt for low-data environments where it is difficult to update parameters without overfitting. Our implementation and instructions to reproduce the experiments are available at https://github.com/naveace/proto-context.