Contrastive learning has emerged as a competitive pretraining method for object detection. Despite this progress, there has been minimal investigation into the robustness of contrastively pretrained detectors when faced with domain shifts. To address this gap, we conduct an empirical study of contrastive learning and out-of-domain object detection, studying how contrastive view design affects robustness. In particular, we perform a case study of the detection-focused pretext task Instance Localization (InsLoc) and propose strategies to augment views and enhance robustness in appearance-shifted and context-shifted scenarios. Amongst these strategies, we propose changes to cropping such as altering the percentage used, adding IoU constraints, and integrating saliency based object priors. We also explore the addition of shortcut-reducing augmentations such as Poisson blending, texture flattening, and elastic deformation. We benchmark these strategies on abstract, weather, and context domain shifts and illustrate robust ways to combine them, in both pretraining on single-object and multi-object image datasets. Overall, our results and insights show how to ensure robustness through the choice of views in contrastive learning.

为了增强对外域物体的检测鲁棒性，我们对对比学习进行了实证研究，并提出了加强鲁棒性的策略，包括改变裁剪百分比、添加 IoU 约束、整合显著性的对象先验，并探索了缩短路径的数据增强方法。在多个领域的基础上进行基准测试，整合多种策略，实验结果表明了如何通过选择视图提高对比学习的鲁棒性。

针对下游目标检测的对比视角设计策略以提高对领域转移的稳健性