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Versatile Teacher: A Class-aware Teacher-student Framework for Cross-domain Adaptation

2024-05-20 03:31:43
Runou Yang, Tian Tian, Jinwen Tian

Abstract

Addressing the challenge of domain shift between datasets is vital in maintaining model performance. In the context of cross-domain object detection, the teacher-student framework, a widely-used semi-supervised model, has shown significant accuracy improvements. However, existing methods often overlook class differences, treating all classes equally, resulting in suboptimal results. Furthermore, the integration of instance-level alignment with a one-stage detector, essential due to the absence of a Region Proposal Network (RPN), remains unexplored in this framework. In response to these shortcomings, we introduce a novel teacher-student model named Versatile Teacher (VT). VT differs from previous works by considering class-specific detection difficulty and employing a two-step pseudo-label selection mechanism, referred to as Class-aware Pseudo-label Adaptive Selection (CAPS), to generate more reliable pseudo labels. These labels are leveraged as saliency matrices to guide the discriminator for targeted instance-level alignment. Our method demonstrates promising results on three benchmark datasets, and extends the alignment methods for widely-used one-stage detectors, presenting significant potential for practical applications. Code is available at this https URL.

Abstract (translated)

在保持模型性能的同时解决数据集之间的领域转换挑战是非常重要的。在跨领域目标检测的背景下,教师-学生框架,一种广泛使用的半监督模型,已经显示出显著的准确性提高。然而,现有的方法通常忽视了类之间的差异,将所有类别都平等对待,导致 suboptimal 的结果。此外,在這個框架中,将实例级对齐与一阶段检测器的集成(由于缺少区域提议网络(RPN))仍然是未探索的。为了应对这些不足,我们引入了一个名为 Versatile Teacher(VT)的新教师-学生模型。VT 与以前的工作不同,考虑了类别特定的检测难度,并采用了一种称为类感知伪标签选择机制(CAPS)来生成更可靠的伪标签。这些标签被用作引导分类器的针对性实例级别对齐的 saliency 矩阵。我们的方法在三个基准数据集上的表现表明,它为广泛使用的一阶段检测器的对齐方法扩展了可能性,具有显著的实用性。代码可以从這個網址获取:https://github.com/your_username/Versatile-Teacher

URL

https://arxiv.org/abs/2405.11754

PDF

https://arxiv.org/pdf/2405.11754.pdf


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