arXiv:2503.11120cs.LGcs.CV2025-03中稿 · publication at the…被引 4

提出多目标评估框架,系统分析模型在医疗影像中的性能与公平性权衡。

A Multi-Objective Evaluation Framework for Analyzing Utility-Fairness Trade-Offs in Machine Learning Systems

  • 基于多目标优化构建评估框架,统一量化性能与公平性指标。
  • 在三个真实医学影像数据集上验证,可识别并缓解不同群体间的诊断偏差。
  • 框架兼容各类模型与多维公平性要求,适合实际应用决策参考。

机器学习公平性模型的评估面临度量标准定义复杂、效用与公平性权衡难等问题。本文提出一种新型多目标评估框架,用于分析机器学习系统中的效用-公平性权衡。该框架基于多目标优化准则,整合收敛性、系统容量、多样性等多维度信息,通过雷达图与统计表实现对多个机器学习系统的量化与定性综合评估。研究聚焦医疗影像领域,因偏差诊断系统可能影响患者结局,公平性至关重要。框架支持多类公平约束,有助于识别并缓解不同人口群体间的差异,同时保持诊断性能。其模型无关性使其可适配黑盒或白盒模型,任意数量与类型的评估指标,包括多维公平性标准。通过多种仿真及三个真实医疗影像数据集上的实证研究,验证了框架的有效性与实用性。代码已开源:https://pypi.org/project/fairical。

原文摘要 · Abstract (English)

The evaluation of fairness models in Machine Learning involves complex challenges, such as defining appropriate metrics, balancing trade-offs between utility and fairness, and there are still gaps in this stage. This work presents a novel multi-objective evaluation framework that enables the analysis of utility-fairness trade-offs in Machine Learning systems. The framework was developed using criteria from Multi-Objective Optimization that collect comprehensive information regarding this complex evaluation task. The assessment of multiple Machine Learning systems is summarized, both quantitatively and qualitatively, in a straightforward manner through a radar chart and a measurement table encompassing various aspects such as convergence, system capacity, and diversity. The framework's compact representation of performance facilitates the comparative analysis of different Machine Learning strategies for decision-makers, in real-world applications, with single or multiple fairness requirements. In particular, this study focuses on the medical imaging domain, where fairness considerations are crucial due to the potential impact of biased diagnostic systems on patient outcomes. The proposed framework enables a systematic evaluation of multiple fairness constraints helping to identify and mitigate disparities among demographic groups while maintaining diagnostic performance. The framework is model-agnostic and flexible to be adapted to any kind of Machine Learning systems, that is, black- or white-box, any kind and quantity of evaluation metrics, including multidimensional fairness criteria. The functionality and effectiveness of the proposed framework is shown with different simulations, and an empirical study conducted on three real-world medical imaging datasets with various Machine Learning systems. Our evaluation framework is publicly available at https://pypi.org/project/fairical.

公平性评估医疗影像多目标优化

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