Title
Towards Unsupervised Crowd Counting via Regression-Detection Bi-knowledge Transfer
Abstract
Unsupervised crowd counting is a challenging yet not largely explored task. In this paper, we explore it in a transfer learning setting where we learn to detect and count persons in an unlabeled target set by transferring bi-knowledge learnt from regression- and detection-based models in a labeled source set. The dual source knowledge of the two models is heterogeneous and complementary as they capture different modalities of the crowd distribution. We formulate the mutual transformations between the outputs of regression- and detection-based models as two scene-agnostic transformers which enable knowledge distillation between the two models. Given the regression- and detection-based models and their mutual transformers learnt in the source, we introduce an iterative self-supervised learning scheme with regression-detection bi-knowledge transfer in the target. Extensive experiments on standard crowd counting benchmarks, ShanghaiTech, UCF_CC_50, and UCF_QNRF demonstrate a substantial improvement of our method over other state-of-the-arts in the transfer learning setting.
Year
DOI
Venue
2020
10.1145/3394171.3413825
MM '20: The 28th ACM International Conference on Multimedia Seattle WA USA October, 2020
DocType
ISBN
Citations 
Conference
978-1-4503-7988-5
1
PageRank 
References 
Authors
0.35
30
6
Name
Order
Citations
PageRank
Yuting Liu182.15
Zheng Wang235236.33
Miaojing Shi318611.27
Shin'ichi Satoh42093277.41
David Zhang55068234.25
Hongyu Yang611113.12