arXiv:2608.20942cs.CVmath-ph2026-08

用双曲几何流设计新分割网络,提升医学图像边界模糊时的准确性。

LHMCF-Net: A Learned Hyperbolic Mean Curvature Flow Network for Medical Images Segmentation

论文配图:LHMCF-Net: A Learned Hyperbolic Mean Curvature Flow Network for Medical Images Segmentation
图 1 · 摘自论文原文
  • 基于双曲平均曲率流构建可学习的演化模型,引入速度场增强边界推动力。
  • 在三个公开数据集上表现优于现有方法,尤其在低对比度和模糊边界场景中显著领先。
  • 适合需要高鲁棒性分割的医学影像研究者,尤其关注边界清晰度的应用。

受经典Chan-Vese模型及深度先验捕捉复杂空间结构能力的启发,本文提出一种基于学习型双曲平均曲率流(LHMCF)的分割模型,将特征空间数据保真度与深度结构先验统一嵌入高维框架。该模型由二阶耗散双曲偏微分方程(PDE) governing,引入速度场赋予演化界面惯性与动量,使轮廓能绕过噪声引起的局部极小值,并在低对比度或模糊区域保持连贯传播,克服了一阶抛物流的固有局限。为求解连续的LHMCF模型,构建了名为LHMCF-Net的深度展开网络,将PDE的迭代数值过程映射为一系列离散演化阶段,每个阶段对应物理可解释的动力系统更新,使网络兼具PDE的稳定性与几何一致性,同时支持端到端优化。在三个公开医学图像分割数据集上的全面实验表明,LHMCF-Net在低对比度和边界不清等挑战性场景中均取得优异性能,验证了将双曲几何演化嵌入深度展开架构的有效性,凸显了物理启发模型在鲁棒医学图像分割中的潜力。

原文摘要 · Abstract (English)

Motivated by the classical Chan-Vese model and the ability of deep priors to capture complex spatial structures, we develop a segmentation model that leverages learned hyperbolic mean curvature flow (LHMCF) as a mathematical foundation for integrating feature space data fidelity and deep structural priors within a unified high-dimensional framework. The proposed LHMCF model is governed by a second-order dissipative hyperbolic PDE, where the introduction of a velocity field provides inertia and momentum to the evolving interface. This hyperbolic mechanism enables the contour to bypass noise-induced local minima and propagate coherently through low-contrast or ambiguous regions, addressing limitations inherent to first-order parabolic flows. To solve the continuous LHMCF model, we construct a deep unfolding network, named LHMCF-Net, which maps the iterative numerical procedure of the PDE into a sequence of discrete evolution stages. Each stage corresponds to one physically interpretable update of the underlying dynamical system, allowing the network to inherit the stability and geometric consistency of the PDE while supporting end-to-end optimization. Comprehensive experiments on three publicly available medical segmentation datasets demonstrate that LHMCF-Net achieves superior performance, particularly in challenging scenarios with low contrast and unclear boundaries. These results highlight the effectiveness of embedding hyperbolic geometric evolution into deep unfolding architectures and underscore the potential of physically inspired models for robust medical image segmentation.

医学图像分割双曲几何深度展开边界检测

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