Imbalanced Continual Learning with Partitioning Reservoir Sampling

• URL: http://arxiv.org/abs/2009.03632v1
• Date: Tue, 8 Sep 2020 10:28:18 GMT
• Title: Imbalanced Continual Learning with Partitioning Reservoir Sampling
• Authors: Chris Dongjoo Kim, Jinseo Jeong, and Gunhee Kim
• Abstract summary: Continual learning from a sequential stream of data is a crucial challenge for machine learning research. We identify unanticipated adversity innately existent in many multi-label datasets, the long-tailed distribution. We propose a new sampling strategy for replay-based approach named Partitioning Reservoir Sampling (PRS)
• Score: 46.427023757892336
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Continual learning from a sequential stream of data is a crucial challenge for machine learning research. Most studies have been conducted on this topic under the single-label classification setting along with an assumption of balanced label distribution. This work expands this research horizon towards multi-label classification. In doing so, we identify unanticipated adversity innately existent in many multi-label datasets, the long-tailed distribution. We jointly address the two independently solved problems, Catastropic Forgetting and the long-tailed label distribution by first empirically showing a new challenge of destructive forgetting of the minority concepts on the tail. Then, we curate two benchmark datasets, COCOseq and NUS-WIDEseq, that allow the study of both intra- and inter-task imbalances. Lastly, we propose a new sampling strategy for replay-based approach named Partitioning Reservoir Sampling (PRS), which allows the model to maintain a balanced knowledge of both head and tail classes. We publicly release the dataset and the code in our project page.

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