We present a novel class incremental learning approach based on deep neural networks, which continually learns new tasks with limited memory for storing examples in the previous tasks. Our algorithm is based on knowledge distillation and provides a principled way to maintain the representations of old models while adjusting to new tasks effectively. The proposed method estimates the relationship between the representation changes and the resulting loss increases incurred by model updates. It minimizes the upper bound of the loss increases using the representations, which exploits the estimated importance of each feature map within a backbone model. Based on the importance, the model restricts updates of important features for robustness while allowing changes in less critical features for flexibility. This optimization strategy effectively alleviates the notorious catastrophic forgetting problem despite the limited accessibility of data in the previous tasks. The experimental results show significant accuracy improvement of the proposed algorithm over the existing methods on the standard datasets. Code is available.

本论文提出了基于深度神经网络的一种新型增量学习方法，该方法基于知识蒸馏并采用一种规范的方式来有效地维护旧模型的表示，以适应新任务，克服了数据访问受限导致的灾难性遗忘问题，并在标准数据集上实现了显著的准确性改进。

适应性特征融合的知识蒸馏分类增量学习