arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.09533cs.CVcs.LG
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地标定位中基于高斯热图的标注不确定性建模

Modeling Annotation Uncertainty with Gaussian Heatmaps in Landmark Localization

Graz University of Technology(格拉茨理工大学);Medical University of Graz(格拉茨医科大学);The University of Auckland(奥克兰大学)

Franz Thaler, Christian Payer, Martin Urschler, Darko Stern

摘要:

在地标定位中,由于在定义其精确位置时的模糊性,地标注释可能遭受大的观察者变化,这导致不确定的注释。为了对训练数据集的注释模糊性进行建模,我们建议在优化期间学习对目标热图的形状进行建模的各向异性高斯参数。此外,我们的方法通过在推断期间将各向异性高斯函数拟合到预测的热图来对单个样本的预测不确定性进行建模。除了国家的最先进的结果,我们的实验数据集的手X光片和侧头X光片也表明,高斯函数与定位精度和观察者的变化。作为最后一个实验,我们显示的重要性,整合的不确定性,通过测量的影响,预测的位置不确定性的解剖异常的分类,在侧头X线片的决策。

英文摘要:

In landmark localization, due to ambiguities in defining their exact position, landmark annotations may suffer from large observer variabilities, which result in uncertain annotations. To model the annotation ambiguities of the training dataset, we propose to learn anisotropic Gaussian parameters modeling the shape of the target heatmap during optimization. Furthermore, our method models the prediction uncertainty of individual samples by fitting anisotropic Gaussian functions to the predicted heatmaps during inference. Besides state-of-the-art results, our experiments on datasets of hand radiographs and lateral cephalograms also show that Gaussian functions are correlated with both localization accuracy and observer variability. As a final experiment, we show the importance of integrating the uncertainty into decision making by measuring the influence of the predicted location uncertainty on the classification of anatomical abnormalities in lateral cephalograms.

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。

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