论文标题

对皮肤病变细分的自我监督的辅助积极学习

Self-supervised Assisted Active Learning for Skin Lesion Segmentation

论文作者

Zhao, Ziyuan, Lu, Wenjing, Zeng, Zeng, Xu, Kaixin, Veeravalli, Bharadwaj, Guan, Cuntai

论文摘要

由于较高的注释成本和专业要求,标签稀缺是生物医学图像细分的长期问题。最近,主动学习(AL)策略努力通过查询一小部分数据以进行注释,从而在医学成像领域受到很多吸引力,以降低注释成本。但是,大多数现有的AL方法必须根据一些随机选择的样本初始化模型,然后根据各种标准(例如不确定性和多样性)进行主动选择。这种随机启动的初始化方法不可避免地引入了价值冗余样本和不必要的注释成本。为了解决这个问题,我们在冷启动环境中提出了一个新颖的自我监督的辅助积极学习框架,在该设置中,首先使用自我监督的学习(SSL)对分割模型进行热身,然后使用SSL特征通过潜在特征集群而无需访问标签。我们评估了有关皮肤病变细分任务的建议方法。广泛的实验表明,我们的方法能够实现有希望的表现,并且对现有基准的大大改善。

Label scarcity has been a long-standing issue for biomedical image segmentation, due to high annotation costs and professional requirements. Recently, active learning (AL) strategies strive to reduce annotation costs by querying a small portion of data for annotation, receiving much traction in the field of medical imaging. However, most of the existing AL methods have to initialize models with some randomly selected samples followed by active selection based on various criteria, such as uncertainty and diversity. Such random-start initialization methods inevitably introduce under-value redundant samples and unnecessary annotation costs. For the purpose of addressing the issue, we propose a novel self-supervised assisted active learning framework in the cold-start setting, in which the segmentation model is first warmed up with self-supervised learning (SSL), and then SSL features are used for sample selection via latent feature clustering without accessing labels. We assess our proposed methodology on skin lesions segmentation task. Extensive experiments demonstrate that our approach is capable of achieving promising performance with substantial improvements over existing baselines.

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