Uncertainty-Aware Distillation for Semi-Supervised Few-Shot Class-Incremental Learning

• URL: http://arxiv.org/abs/2301.09964v1
• Date: Tue, 24 Jan 2023 12:53:06 GMT
• Title: Uncertainty-Aware Distillation for Semi-Supervised Few-Shot Class-Incremental Learning
• Authors: Yawen Cui, Wanxia Deng, Haoyu Chen, and Li Liu
• Abstract summary: We present a framework named Uncertainty-aware Distillation with Class-Equilibrium (UaD-CE) We introduce the CE module that employs a class-balanced self-training to avoid the gradual dominance of easy-to-classified classes on pseudo-label generation. Comprehensive experiments on three benchmark datasets demonstrate that our method can boost the adaptability of unlabeled data.
• Score: 16.90277839119862
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Given a model well-trained with a large-scale base dataset, Few-Shot Class-Incremental Learning (FSCIL) aims at incrementally learning novel classes from a few labeled samples by avoiding overfitting, without catastrophically forgetting all encountered classes previously. Currently, semi-supervised learning technique that harnesses freely-available unlabeled data to compensate for limited labeled data can boost the performance in numerous vision tasks, which heuristically can be applied to tackle issues in FSCIL, i.e., the Semi-supervised FSCIL (Semi-FSCIL). So far, very limited work focuses on the Semi-FSCIL task, leaving the adaptability issue of semi-supervised learning to the FSCIL task unresolved. In this paper, we focus on this adaptability issue and present a simple yet efficient Semi-FSCIL framework named Uncertainty-aware Distillation with Class-Equilibrium (UaD-CE), encompassing two modules UaD and CE. Specifically, when incorporating unlabeled data into each incremental session, we introduce the CE module that employs a class-balanced self-training to avoid the gradual dominance of easy-to-classified classes on pseudo-label generation. To distill reliable knowledge from the reference model, we further implement the UaD module that combines uncertainty-guided knowledge refinement with adaptive distillation. Comprehensive experiments on three benchmark datasets demonstrate that our method can boost the adaptability of unlabeled data with the semi-supervised learning technique in FSCIL tasks.

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