Large Language Models like ChatGPT demonstrate a remarkable capacity to learn new concepts during inference without any fine-tuning. However, visual models trained to detect new objects during inference have been unable to replicate this ability, and instead either perform poorly or require meta-training and/or fine-tuning on similar objects. In this work, we propose a meta-learning algorithm that emulates Large Language Models by learning new visual concepts during inference without fine-tuning. Our approach leverages a frozen pre-trained feature extractor, and analogous to in-context learning, recasts meta-learning as sequence modeling over datapoints with known labels and a test datapoint with an unknown label. On 8 out of 11 meta-learning benchmarks, our approach -- without meta-training or fine-tuning -- exceeds or matches the state-of-the-art algorithm, P>M>F, which is meta-trained on these benchmarks.

在这项工作中，我们提出了一种元学习算法，通过在推理过程中学习新的视觉概念而无需微调，模拟了类似大型语言模型的能力。我们的方法利用一个冻结的预训练特征提取器，并将元学习重新构造为对具有已知标签的数据点和具有未知标签的测试数据点进行序列建模，从而在11个元学习基准中的8个中，超过或与元训练于这些基准的最先进算法P>M>F相匹配，而无需元训练或微调。

上下文感知元学习