PT Unknown
AU Chenshen Wu
   Joost Van de Weijer
TI Density Map Distillation for Incremental Object Counting
BT Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops
PY 2023
BP 2505
EP 2514
DI 10.1109/CVPRW59228.2023.00249
AB We investigate the problem of incremental learning for object counting, where a method must learn to count a variety of object classes from a sequence of datasets. A naïve approach to incremental object counting would suffer from catastrophic forgetting, where it would suffer from a dramatic performance drop on previous tasks. In this paper, we propose a new exemplar-free functional regularization method, called Density Map Distillation (DMD). During training, we introduce a new counter head for each task and introduce a distillation loss to prevent forgetting of previous tasks. Additionally, we introduce a cross-task adaptor that projects the features of the current backbone to the previous backbone. This projector allows for the learning of new features while the backbone retains the relevant features for previous tasks. Finally, we set up experiments of incremental learning for counting new objects. Results confirm that our method greatly reduces catastrophic forgetting and outperforms existing methods.
ER