cs.AI updates on arXiv.org 07月04日
Temporally-Aware Supervised Contrastive Learning for Polyp Counting in Colonoscopy
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本文提出一种基于监督对比损失的息肉计数新方法,通过结合时间感知软目标,提高息肉识别的鲁棒性,并在公开数据集上实现2.2倍的碎片化率降低,为结肠镜检查自动化提供新思路。

arXiv:2507.02493v1 Announce Type: cross Abstract: Automated polyp counting in colonoscopy is a crucial step toward automated procedure reporting and quality control, aiming to enhance the cost-effectiveness of colonoscopy screening. Counting polyps in a procedure involves detecting and tracking polyps, and then clustering tracklets that belong to the same polyp entity. Existing methods for polyp counting rely on self-supervised learning and primarily leverage visual appearance, neglecting temporal relationships in both tracklet feature learning and clustering stages. In this work, we introduce a paradigm shift by proposing a supervised contrastive loss that incorporates temporally-aware soft targets. Our approach captures intra-polyp variability while preserving inter-polyp discriminability, leading to more robust clustering. Additionally, we improve tracklet clustering by integrating a temporal adjacency constraint, reducing false positive re-associations between visually similar but temporally distant tracklets. We train and validate our method on publicly available datasets and evaluate its performance with a leave-one-out cross-validation strategy. Results demonstrate a 2.2x reduction in fragmentation rate compared to prior approaches. Our results highlight the importance of temporal awareness in polyp counting, establishing a new state-of-the-art. Code is available at https://github.com/lparolari/temporally-aware-polyp-counting.

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结肠镜检查 息肉计数 自动化 监督学习 对比损失
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