The two main impediments to continual learning are catastrophic forgetting and memory limitations on the storage of data. To cope with these challenges, we propose a novel, cognitively-inspired approach which trains autoencoders with Neural Style Transfer to encode and store images. During training on a new task, reconstructed images from encoded episodes are replayed in order to avoid catastrophic forgetting. The loss function for the reconstructed images is weighted to reduce its effect during classifier training to cope with image degradation. When the system runs out of memory the encoded episodes are converted into centroids and covariance matrices, which are used to generate pseudo-images during classifier training, keeping classifier performance stable while using less memory. Our approach increases classification accuracy by 13-17% over state-of-the-art methods on benchmark datasets, while requiring 78% less storage space.
@article{arxiv.2101.04904,
title = {EEC: Learning to Encode and Regenerate Images for Continual Learning},
author = {Ali Ayub and Alan R. Wagner},
journal= {arXiv preprint arXiv:2101.04904},
year = {2021}
}
Comments
Added link to the code in the paper. A preliminary version of this work was presented at ICML 2020 Workshop on Lifelong Machine Learning: arXiv:2007.06637