论文标题
非平衡数据集的活动类增量学习
Active Class Incremental Learning for Imbalanced Datasets
论文作者
论文摘要
增量学习(IL)允许AI系统适应流数据。大多数现有的算法提出了两个强有力的假设,这些假设降低了增量方案的现实主义:(1)在流式传输时很容易注释新数据,并且(2)测试使用平衡的数据集运行,而大多数现实生活数据集实际上是不平衡的。这些假设被丢弃,由此产生的挑战是通过积极和不平衡学习的结合来应对的。我们介绍了处理不平衡并与IL约束兼容的样本采集功能。我们还将IL视为一个不平衡的学习问题,而不是对灾难性遗忘的知识蒸馏的确定用法。在这里,通过类预测缩放在推断期间降低了不平衡效应。评估是通过四个视觉数据集进行的,并比较现有和建议的样本采集功能。结果表明,所提出的贡献具有积极作用,并减少了主动IL性能和标准IL性能之间的差距。
Incremental Learning (IL) allows AI systems to adapt to streamed data. Most existing algorithms make two strong hypotheses which reduce the realism of the incremental scenario: (1) new data are assumed to be readily annotated when streamed and (2) tests are run with balanced datasets while most real-life datasets are actually imbalanced. These hypotheses are discarded and the resulting challenges are tackled with a combination of active and imbalanced learning. We introduce sample acquisition functions which tackle imbalance and are compatible with IL constraints. We also consider IL as an imbalanced learning problem instead of the established usage of knowledge distillation against catastrophic forgetting. Here, imbalance effects are reduced during inference through class prediction scaling. Evaluation is done with four visual datasets and compares existing and proposed sample acquisition functions. Results indicate that the proposed contributions have a positive effect and reduce the gap between active and standard IL performance.