arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2202.08141cs.CV
收藏

FUN-SIS:一种完全无监督的手术器械分割方法

FUN-SIS: a Fully UNsupervised approach for Surgical Instrument Segmentation

University of Strasbourg(斯特拉斯堡大学);CNRS(法国国家科学研究中心);IHU Strasbourg(斯特拉斯堡大学医院);Politecnico di Milano(米兰理工大学)

Luca Sestini, Benoit Rosa, Elena De Momi, Giancarlo Ferrigno, Nicolas Padoy

摘要:

内窥镜图像的自动手术器械分割是微创手术的许多计算机辅助应用的重要组成部分。到目前为止,最先进的方法完全依赖于通过手动注释获得的地面实况监督信号的可用性,因此大规模收集成本高昂。在本文中,我们提出了FUN-SIS,一个完全无监督的二进制手术器械分割方法。FUN-SIS通过完全依赖于隐含的运动信息和仪器形状先验,在完全未标记的内窥镜视频上训练每帧分割模型。我们将形状先验定义为乐器的真实分割掩模,不一定来自与视频相同的数据集/域。可以以各种方便的方式收集形状先验,例如从其他数据集回收现有的注释。我们利用它们作为一种新的生成对抗方法的一部分,允许在训练过程中对光流图像进行无监督的仪器分割。然后,我们使用所获得的仪器掩码作为伪标签,以训练每帧分割模型;为此,我们开发了一个从噪声标签中学习的架构,旨在从这些伪标签中提取干净的监督信号,利用其特有的噪声特性。我们在三个手术数据集上验证了所提出的贡献,包括MICCAI 2017 EndoVis机器人器械分割挑战数据集。所获得的手术器械分割的完全无监督结果几乎与完全监督的最先进方法的结果相当。这表明所提出的方法具有巨大的潜力,可以利用微创手术中产生的大量未标记数据。

英文摘要:

Automatic surgical instrument segmentation of endoscopic images is a crucial building block of many computer-assistance applications for minimally invasive surgery. So far, state-of-the-art approaches completely rely on the availability of a ground-truth supervision signal, obtained via manual annotation, thus expensive to collect at large scale. In this paper, we present FUN-SIS, a Fully-UNsupervised approach for binary Surgical Instrument Segmentation. FUN-SIS trains a per-frame segmentation model on completely unlabelled endoscopic videos, by solely relying on implicit motion information and instrument shape-priors. We define shape-priors as realistic segmentation masks of the instruments, not necessarily coming from the same dataset/domain as the videos. The shape-priors can be collected in various and convenient ways, such as recycling existing annotations from other datasets. We leverage them as part of a novel generative-adversarial approach, allowing to perform unsupervised instrument segmentation of optical-flow images during training. We then use the obtained instrument masks as pseudo-labels in order to train a per-frame segmentation model; to this aim, we develop a learning-from-noisy-labels architecture, designed to extract a clean supervision signal from these pseudo-labels, leveraging their peculiar noise properties. We validate the proposed contributions on three surgical datasets, including the MICCAI 2017 EndoVis Robotic Instrument Segmentation Challenge dataset. The obtained fully-unsupervised results for surgical instrument segmentation are almost on par with the ones of fully-supervised state-of-the-art approaches. This suggests the tremendous potential of the proposed method to leverage the great amount of unlabelled data produced in the context of minimally invasive surgery.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑