Publication Type

Conference Proceeding Article

Version

acceptedVersion

Publication Date

1-2024

Abstract

Crowd image is arguably one of the most laborious data to annotate. In this paper, we devote to reduce the massive demand of densely labeled crowd data, and propose a novel weakly-supervised setting, in which we leverage the binary ranking of two images with highcontrast crowd counts as training guidance. To enable training under this new setting, we convert the crowd count regression problem to a ranking potential prediction problem. In particular, we tailor a Siamese Ranking Network that predicts the potential scores of two images indicating the ordering of the counts. Hence, the ultimate goal is to assign appropriate potentials for all the crowd images to ensure their orderings obey the ranking labels. On the other hand, potentials reveal the relative crowd sizes but cannot yield an exact crowd count. We resolve this problem by introducing “anchors” during the inference stage. Concretely, anchors are a few images with count labels used for referencing the corresponding counts from potential scores by a simple linear mapping function. We conduct extensive experiments to study various combinations of supervision, and we show that the proposed method outperforms existing weakly-supervised methods without additional labeling effort by a large margin.

Keywords

Crowd Counting, Weakly-supervised Learning, Ranking

Discipline

Graphics and Human Computer Interfaces | Numerical Analysis and Scientific Computing

Research Areas

Software and Cyber-Physical Systems

Publication

Proceedings of the 2024 IEEE/CVF Winter Conference on Applications of Computer Vision, Waikoloa, Hawaii, January 4-8

First Page

1

Last Page

8

Publisher

IEEE Computer Society

City or Country

Los Alamitos, CA

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