提出新方法,让少样本分类在标签错误时仍保持高准确率。
RoNFA: Robust Neural Field-based Approach for Few-Shot Image Classification with Noisy Labels
- 用两个神经场分别表示特征与类别,通过感受野机制建模关系。
- 在噪声标签下性能超越当前最佳方法,甚至优于干净数据训练结果。
- 适合真实场景中标签不洁的少样本分类任务,抗噪能力强。
在少样本学习(FSL)中,标注样本稀缺,标签错误会显著降低分类精度。由于真实任务中标签错误不可避免,提升模型对标签噪声的鲁棒性至关重要。本文提出一种基于神经场的鲁棒少样本图像分类方法(RoNFA)。RoNFA包含两个神经场:特征表示场(FFR)和类别表示场(FCR)。FCR中每个神经元在FFR上具有以软聚类生成的类别代表性神经元为中心的感受野(RF)。预测阶段,根据FCR中神经元激活程度自适应调整感受野范围,确保预测准确性。该方法在三个不同噪声类型的现实世界FSL数据集上验证,显著优于当前最优的少样本方法。即使在标签含噪情况下,其准确率仍超过使用干净支持集训练的先进方法,表明其对标签噪声具有极强鲁棒性。
原文摘要 · Abstract (English)
In few-shot learning (FSL), the labeled samples are scarce. Thus, label errors can significantly reduce classification accuracy. Since label errors are inevitable in realistic learning tasks, improving the robustness of the model in the presence of label errors is critical. This paper proposes a new robust neural field-based image approach (RoNFA) for few-shot image classification with noisy labels. RoNFA consists of two neural fields for feature and category representation. They correspond to the feature space and category set. Each neuron in the field for category representation (FCR) has a receptive field (RF) on the field for feature representation (FFR) centered at the representative neuron for its category generated by soft clustering. In the prediction stage, the range of these receptive fields adapts according to the neuronal activation in FCR to ensure prediction accuracy. These learning strategies provide the proposed model with excellent few-shot learning capability and strong robustness against label noises. The experimental results on real-world FSL datasets with three different types of label noise demonstrate that the proposed method significantly outperforms state-of-the-art FSL methods. Its accuracy obtained in the presence of noisy labels even surpasses the results obtained by state-of-the-art FSL methods trained on clean support sets, indicating its strong robustness against noisy labels.
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