提出新融合框架Bi-MIChI,解决传感器数据标签不确定问题。
Bi-capacity Choquet Integral for Sensor Fusion with Label Uncertainty
- 用双容量建模传感器间非线性交互,支持正负双向数据
- 在合成与真实数据上均实现有效分类与检测性能
- 适用于标签不明确的多源传感场景,如工业监控
传感器融合通过整合多个传感器的数据提升数据解释的可靠性、鲁棒性和准确性。模糊积分(FI),特别是Choquet积分(ChI),常被用作多传感器融合的强大非线性聚合工具。然而,现有的监督式ChI学习算法通常需要每个输入数据点都有精确标签,这在实际中可能难以获取。此外,以往的ChI融合方法仅基于归一化模糊测度,其取值范围限制在[0,1],在输入数据具有双极特性(如[-1,1])时会受限。为此,本文提出一种新型基于Choquet积分的融合框架——Bi-MIChI(发音为“bi-mi-kee”),利用双容量表示输入传感器子集间的相互作用,定义于双极尺度上,从而扩展了传感器间的非线性交互能力,并带来新颖的融合效果。Bi-MIChI还通过多实例学习处理标签不确定性,将训练标签应用于数据包(集合)而非单个实例。在合成与真实世界实验中,该框架在标签不确定的传感器融合任务中表现出色。我们还对模糊测度的行为进行了详细分析,以阐明融合过程。
原文摘要 · Abstract (English)
Sensor fusion combines data from multiple sensor sources to improve reliability, robustness, and accuracy of data interpretation. The Fuzzy Integral (FI), in particular, the Choquet integral (ChI), is often used as a powerful nonlinear aggregator for fusion across multiple sensors. However, existing supervised ChI learning algorithms typically require precise training labels for each input data point, which can be difficult or impossible to obtain. Additionally, prior work on ChI fusion is often based only on the normalized fuzzy measures, which bounds the fuzzy measure values between [0, 1]. This can be limiting in cases where the underlying scales of input data sources are bipolar (i.e., between [-1, 1]). To address these challenges, this paper proposes a novel Choquet integral-based fusion framework, named Bi-MIChI (pronounced "bi-mi-kee"), which uses bi-capacities to represent the interactions between pairs of subsets of the input sensor sources on a bi-polar scale. This allows for extended non-linear interactions between the sensor sources and can lead to interesting fusion results. Bi-MIChI also addresses label uncertainty through Multiple Instance Learning, where training labels are applied to "bags" (sets) of data instead of per-instance. Our proposed Bi-MIChI framework shows effective classification and detection performance on both synthetic and real-world experiments for sensor fusion with label uncertainty. We also provide detailed analyses on the behavior of the fuzzy measures to demonstrate our fusion process.
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