Despite the success of a number of recent techniques for visual self-supervised deep learning, there remains limited investigation into the representations that are ultimately learned. By using recent advances in comparing neural representations, we explore in this direction by comparing a constrastive self-supervised algorithm (SimCLR) to supervision for simple image data in a common architecture. We find that the methods learn similar intermediate representations through dissimilar means, and that the representations diverge rapidly in the final few layers. We investigate this divergence, finding that it is caused by these layers strongly fitting to the distinct learning objectives. We also find that SimCLR's objective implicitly fits the supervised objective in intermediate layers, but that the reverse is not true. Our work particularly highlights the importance of the learned intermediate representations, and raises important questions for auxiliary task design.

对比对神经表示的最新技术，研究了对比自我监督算法和简单图像数据在共同架构中的监督学习方法的中间表示的学习，发现这些方法通过不同的方法学习相似的中间表示，但在最后几层中表示迅速发散，旨在突出学习的中间表示的重要性，并提出了辅助任务设计的关键问题。

自监督和有监督方法是否学习相似的视觉表征？