Availability of labelled data is the major obstacle to the deployment of deep learning algorithms for computer vision tasks in new domains. The fact that many frameworks adopted to solve different tasks share the same architecture suggests that there should be a way of reusing the knowledge learned in a specific setting to solve novel tasks with limited or no additional supervision. In this work, we first show that such knowledge can be shared across tasks by learning a mapping between task-specific deep features in a given domain. Then, we show that this mapping function, implemented by a neural network, is able to generalize to novel unseen domains. Besides, we propose a set of strategies to constrain the learned feature spaces, to ease learning and increase the generalization capability of the mapping network, thereby considerably improving the final performance of our framework. Our proposal obtains compelling results in challenging synthetic-to-real adaptation scenarios by transferring knowledge between monocular depth estimation and semantic segmentation tasks.

本文提出一种基于知识迁移和神经网络的方法，使得在新领域中，能够在有限或无额外监督的情况下利用特定领域中已学知识解决新任务，并且在特征空间约束和映射网络方面提出了一些策略，从而在合成到真实的语境下，利用单目深度估计和语义分割任务之间的知识迁移，获取了令人满意的结果。

跨任务和领域传递良好特征的学习