Deep Metric Learning (DML) is arguably one of the most influential lines of research for learning visual similarities with many proposed approaches every year. Although the field benefits from the rapid progress, the divergence in training protocols, architectures, and parameter choices make an unbiased comparison difficult. To provide a consistent reference point, we revisit the most widely used DML objective functions and conduct a study of the crucial parameter choices as well as the commonly neglected mini-batch sampling process. Based on our analysis, we uncover a correlation between the embedding space compression and the generalization performance of DML models. Exploiting these insights, we propose a simple, yet effective, training regularization to reliably boost the performance of ranking-based DML models on various standard benchmark datasets.

本文通过对深度度量学习算法的客观比较研究，发现了深度度量学习算法饱和度高于文献中表明的水平，并揭示了嵌入空间密度与模型泛化性能之间的相关性，并提出了一种简单有效的训练正则化方法来提高基于排名的深度度量学习模型的性能。

深度度量学习中训练策略和泛化性能的重访