Class-conditional domain adaptation for semantic segmentation

IF 17.3 3区 计算机科学 Q1 COMPUTER SCIENCE, SOFTWARE ENGINEERING
Yue Wang, Yuke Li, James H. Elder, Runmin Wu, Huchuan Lu
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Abstract

Semantic segmentation is an important sub-task for many applications. However, pixel-level ground-truth labeling is costly, and there is a tendency to overfit to training data, thereby limiting the generalization ability. Unsupervised domain adaptation can potentially address these problems by allowing systems trained on labelled datasets from the source domain (including less expensive synthetic domain) to be adapted to a novel target domain. The conventional approach involves automatic extraction and alignment of the representations of source and target domains globally. One limitation of this approach is that it tends to neglect the differences between classes: representations of certain classes can be more easily extracted and aligned between the source and target domains than others, limiting the adaptation over all classes. Here, we address this problem by introducing a Class-Conditional Domain Adaptation (CCDA) method. This incorporates a class-conditional multi-scale discriminator and class-conditional losses for both segmentation and adaptation. Together, they measure the segmentation, shift the domain in a class-conditional manner, and equalize the loss over classes. Experimental results demonstrate that the performance of our CCDA method matches, and in some cases, surpasses that of state-of-the-art methods.

Abstract Image

用于语义分割的类条件域适应
语义分割是许多应用中的重要子任务。然而,像素级地面实况标注成本高昂,而且有过度适应训练数据的趋势,从而限制了泛化能力。无监督领域适应可以解决这些问题,它允许在源领域(包括成本较低的合成领域)的标注数据集上训练的系统适应新的目标领域。传统的方法涉及源域和目标域表征的自动提取和全局对齐。这种方法的一个局限是,它往往会忽略不同类别之间的差异:某些类别的表征比其他类别更容易在源域和目标域之间提取和配准,从而限制了对所有类别的适配。在此,我们引入了一种类条件域适应(CCDA)方法来解决这一问题。该方法结合了分类条件多尺度判别器以及用于分割和适应的分类条件损失。它们共同测量分割,以类条件方式移动域,并均衡各类损失。实验结果表明,我们的 CCDA 方法与最先进的方法性能相当,在某些情况下甚至超过了它们。
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来源期刊
Computational Visual Media
Computational Visual Media Computer Science-Computer Graphics and Computer-Aided Design
CiteScore
16.90
自引率
5.80%
发文量
243
审稿时长
6 weeks
期刊介绍: Computational Visual Media is a peer-reviewed open access journal. It publishes original high-quality research papers and significant review articles on novel ideas, methods, and systems relevant to visual media. Computational Visual Media publishes articles that focus on, but are not limited to, the following areas: • Editing and composition of visual media • Geometric computing for images and video • Geometry modeling and processing • Machine learning for visual media • Physically based animation • Realistic rendering • Recognition and understanding of visual media • Visual computing for robotics • Visualization and visual analytics Other interdisciplinary research into visual media that combines aspects of computer graphics, computer vision, image and video processing, geometric computing, and machine learning is also within the journal''s scope. This is an open access journal, published quarterly by Tsinghua University Press and Springer. The open access fees (article-processing charges) are fully sponsored by Tsinghua University, China. Authors can publish in the journal without any additional charges.
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