Semantic segmentation methods in the supervised scenario have achieved significant improvement in recent years. However, when directly deploying the trained model to segment the images of unseen (or new coming) domains, its performance usually drops dramatically due to the data-distribution discrepancy between seen and unseen domains. To overcome this limitation, we propose a novel domain generalization framework for the generalizable semantic segmentation task, which enhances the generalization ability of the model from two different views, including the training paradigm and the data-distribution discrepancy. Concretely, we exploit the model-agnostic learning method to simulate the domain shift problem, which deals with the domain generalization from the training scheme perspective. Besides, considering the data-distribution discrepancy between source domains and unseen target domains, we develop the target-specific normalization scheme to further boost the generalization ability in unseen target domains. Extensive experiments highlight that the proposed method produces state-of-the-art performance for the domain generalization of semantic segmentation on multiple benchmark segmentation datasets (i.e., Cityscapes, Mapillary). Furthermore, we gain an interesting observation that the target-specific normalization can benefit from the model-agnostic learning scheme.

本文提出了一种新颖的域泛化框架，通过模拟域转化问题与数据分布差异之间的关系以增强模型的泛化能力，从训练策略和测试策略两个不同视角来增强模型的泛化能力。实验证明，该方法在多个基准细分数据集上都取得了最新的前沿成果。

面向目标的规范化通用模型无关语义分割