We propose an approach to self-supervised representation learning based on maximizing mutual information between features extracted from multiple views of a shared context. For example, a context could be an image from ImageNet, and multiple views of the context could be generated by repeatedly applying data augmentation to the image. Following this approach, we develop a new model which maximizes mutual information between features extracted at multiple scales from independently-augmented copies of each input. Our model significantly outperforms prior work on the tasks we consider. Most notably, it achieves over 60% accuracy on ImageNet using the standard linear evaluation protocol. This improves on prior results by over 4% (absolute). On Places205, using the representations learned on ImageNet, our model achieves 50% accuracy. This improves on prior results by 2% (absolute). When we extend our model to use mixture-based representations, segmentation behaviour emerges as a natural side-effect.

该研究提出了一种基于最大化共享环境的多视角特征提取之间的互信息来进行自我监督表示学习的方法，并通过使用该方法建立一个模型，该模型学习到的图像表示在ImageNet等任务上的表现优于以前的方法。

通过最大化视角间相互信息来学习表示