Saliency-Guided Hidden Associative Replay for Continual Learning
Guangji Bai Qilong Zhao Xiaoyang Jiang Yifei Zhang Liang Zhao
Continual Learning is a burgeoning domain in next-generation AI, focusing on
training neural networks over a sequence of tasks akin to human learning. While
CL provides an edge over traditional supervised learning, its central challenge
remains to counteract catastrophic forgetting and ensure the retention of prior
tasks during subsequent learning. Amongst various strategies to tackle this,
replay based methods have emerged as preeminent, echoing biological memory
mechanisms. However, these methods are memory intensive, often preserving
entire data samples, an approach inconsistent with humans selective memory
retention of salient experiences. While some recent works have explored the
storage of only significant portions of data in episodic memory, the inherent
nature of partial data necessitates innovative retrieval mechanisms. Current
solutions, like inpainting, approximate full data reconstruction from partial
cues, a method that diverges from genuine human memory processes. Addressing
these nuances, this paper presents the Saliency Guided Hidden Associative
Replay for Continual Learning. This novel framework synergizes associative
memory with replay-based strategies. SHARC primarily archives salient data
segments via sparse memory encoding. Importantly, by harnessing associative
memory paradigms, it introduces a content focused memory retrieval mechanism,
promising swift and near-perfect recall, bringing CL a step closer to authentic
human memory processes. Extensive experimental results demonstrate the
effectiveness of our proposed method for various continual learning tasks.