[论文] Cross-Model Agreement as a Deployment-Time Reliability Signal for Automatic Polyp Segmentation

论文概要

研究领域: CV
作者: Siddharth Gupta, Jitin Singla
发布时间: 2026-09-09
arXiv: 2609.10495

中文摘要

在实时结肠镜检查中，推理时无法获得真值标注，因此息肉分割模型可能静默失败。本文提出基于裁判的质量估计(RBQE)，一种无参考框架，测量主分割模型与独立训练的裁判在同一图像上的一致性。RBQE在来自四个公共数据集的标准化1223张图像外部基准上评估。使用共同的一致性Dice描述符，仅随机初始化不同的同架构裁判已产生有用的可靠性信号(ROC-AUC=0.923)，表明独立训练本身已足够。跨架构裁判进一步提升：SegFormer-B0达到最强性能(ROC-AUC=0.960)，显著优于同架构对照和UNet++。RBQE还支持选择性预测，随着低一致性案例被逐步拒绝，保留预测的平均Dice增加，且推理时仅需一次额外的确定性裁判前向传播。

原文摘要

In real-time colonoscopy, ground-truth annotations are unavailable at inference, so polyp segmentation models can fail silently. We propose Referee-Based Quality Estimation (RBQE), a reference-free framework measuring agreement between a primary segmentation model and an independently trained referee on the same image. RBQE is evaluated on a standardized 1,223-image external benchmark drawn from four public datasets, using four referee configurations chosen to separate two design axes: referee independence and architectural diversity. Using a common Agreement Dice descriptor, a same-architecture referee differing from the primary model only in random initialization already yields a useful reliability signal (ROC-AUC = 0.923), showing that independent training alone is sufficient. Cross-architecture referees improve further: SegFormer-B0 achieves the strongest performance (ROC-AUC = 0.960), significantly outperforming the same-architecture control and UNet++, and exceeding a representative Test-Time Augmentation baseline by 0.055 ROC-AUC under an identical protocol, whereas a prompt-coupled MedSAM referee underperforms despite maximal architectural多样性. Because empty-mask agreement is trivially separable, we also report a restricted evaluation excluding such cases: ROC-AUC falls to 0.876 (SegFormer-B0, 1,046 images) and 0.783 (same-architecture control, 975 images), yet RBQE's margin over both baselines widens on this identical subset. RBQE additionally increases the mean Dice of retained predictions as low-agreement cases are progressively rejected, supporting selective prediction, and requires only one additional deterministic referee forward pass at inference. Our study therefore supports cross-model agreement as a practical, interpretable reliability framework for automated polyp segmentation.

自动采集于 2026-09-11

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