PT Unknown
AU Filip Szatkowski
   Mateusz Pyla
   Marcin Przewięzlikowski
   Sebastian Cygert
   Bartłomiej Twardowski
   Tomasz Trzcinski
TI Adapt Your Teacher: Improving Knowledge Distillation for Exemplar-Free Continual Learning
BT Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV) Workshops
PY 2023
BP 3512
EP 3517
AB In this work, we investigate exemplar-free class incremental learning (CIL) with knowledge distillation (KD) as a regularization strategy, aiming to prevent forgetting. KD-based methods are successfully used in CIL, but they often struggle to regularize the model without access to exemplars of the training data from previous tasks. Our analysis reveals that this issue originates from substantial representation shifts in the teacher network when dealing with out-of-distribution data. This causes large errors in the KD loss component, leading to performance degradation in CIL. Inspired by recent test-time adaptation methods, we introduce Teacher Adaptation (TA), a method that concurrently updates the teacher and the main model during incremental training. Our method seamlessly integrates with KD-based CIL approaches and allows for consistent enhancement of their performance across multiple exemplar-free CIL benchmarks.
ER