There has been a tremendous progress in Domain Adaptation (DA) for visual
recognition tasks. Particularly, open-set DA has gained considerable attention
wherein the target domain contains additional unseen categories. Existing
open-set DA approaches demand access to a labeled source dataset along with
unlabeled target instances. However, this reliance on co-existing source and
target data is highly impractical in scenarios where data-sharing is restricted
due to its proprietary nature or privacy concerns. Addressing this, we
introduce a practical DA paradigm where a source-trained model is used to
facilitate adaptation in the absence of the source dataset in future. To this
end, we formalize knowledge inheritability as a novel concept and propose a
simple yet effective solution to realize inheritable models suitable for the
above practical paradigm. Further, we present an objective way to quantify
inheritability to enable the selection of the most suitable source model for a
given target domain, even in the absence of the source data. We provide
theoretical insights followed by a thorough empirical evaluation demonstrating
state-of-the-art open-set domain adaptation performance.

在没有使用带标签源数据集的情况下，提出了一种新颖的领域适配范式，其中源培训模型被用于实现适应。该方法包括一种知识继承度量方法，以及一种可实现适应的继承模型选择方法。在视觉识别任务中进行综合实验评估，取得了最先进的开放域适配性能。