Towards More Practical Group Activity Detection: A New Benchmark and Model
- URL: http://arxiv.org/abs/2312.02878v2
- Date: Thu, 25 Jul 2024 15:20:48 GMT
- Title: Towards More Practical Group Activity Detection: A New Benchmark and Model
- Authors: Dongkeun Kim, Youngkil Song, Minsu Cho, Suha Kwak,
- Abstract summary: Group activity detection (GAD) is the task of identifying members of each group and classifying the activity of the group at the same time in a video.
We present a new dataset, dubbed Caf'e, which presents more practical scenarios and metrics.
We also propose a new GAD model that deals with an unknown number of groups and latent group members efficiently and effectively.
- Score: 61.39427407758131
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Group activity detection (GAD) is the task of identifying members of each group and classifying the activity of the group at the same time in a video. While GAD has been studied recently, there is still much room for improvement in both dataset and methodology due to their limited capability to address practical GAD scenarios. To resolve these issues, we first present a new dataset, dubbed Caf\'e. Unlike existing datasets, Caf\'e is constructed primarily for GAD and presents more practical scenarios and metrics, as well as being large-scale and providing rich annotations. Along with the dataset, we propose a new GAD model that deals with an unknown number of groups and latent group members efficiently and effectively. We evaluated our model on three datasets including Caf\'e, where it outperformed previous work in terms of both accuracy and inference speed.
Related papers
- Learning to Paraphrase Sentences to Different Complexity Levels [3.0273878903284275]
Sentence simplification is an active research topic in NLP, but its adjacent tasks of sentence complexification and same-level paraphrasing are not.
To train models on all three tasks, we present two new unsupervised datasets.
arXiv Detail & Related papers (2023-08-04T09:43:37Z) - Learning from Temporal Spatial Cubism for Cross-Dataset Skeleton-based
Action Recognition [88.34182299496074]
Action labels are only available on a source dataset, but unavailable on a target dataset in the training stage.
We utilize a self-supervision scheme to reduce the domain shift between two skeleton-based action datasets.
By segmenting and permuting temporal segments or human body parts, we design two self-supervised learning classification tasks.
arXiv Detail & Related papers (2022-07-17T07:05:39Z) - Towards Group Robustness in the presence of Partial Group Labels [61.33713547766866]
spurious correlations between input samples and the target labels wrongly direct the neural network predictions.
We propose an algorithm that optimize for the worst-off group assignments from a constraint set.
We show improvements in the minority group's performance while preserving overall aggregate accuracy across groups.
arXiv Detail & Related papers (2022-01-10T22:04:48Z) - Focus on the Common Good: Group Distributional Robustness Follows [47.62596240492509]
This paper proposes a new and simple algorithm that explicitly encourages learning of features that are shared across various groups.
While Group-DRO focuses on groups with worst regularized loss, focusing instead, on groups that enable better performance even on other groups, could lead to learning of shared/common features.
arXiv Detail & Related papers (2021-10-06T09:47:41Z) - Learning Multi-Attention Context Graph for Group-Based Re-Identification [214.84551361855443]
Learning to re-identify or retrieve a group of people across non-overlapped camera systems has important applications in video surveillance.
In this work, we consider employing context information for identifying groups of people, i.e., group re-id.
We propose a novel unified framework based on graph neural networks to simultaneously address the group-based re-id tasks.
arXiv Detail & Related papers (2021-04-29T09:57:47Z) - Social Adaptive Module for Weakly-supervised Group Activity Recognition [143.68241396839062]
This paper presents a new task named weakly-supervised group activity recognition (GAR)
It differs from conventional GAR tasks in that only video-level labels are available, yet the important persons within each frame are not provided even in the training data.
This eases us to collect and annotate a large-scale NBA dataset and thus raise new challenges to GAR.
arXiv Detail & Related papers (2020-07-18T16:40:55Z) - GroupIM: A Mutual Information Maximization Framework for Neural Group
Recommendation [24.677145454396822]
We study the problem of making item recommendations to ephemeral groups, which comprise users with limited or no historical activities together.
Existing studies target persistent groups with substantial activity history, while ephemeral groups lack historical interactions.
We propose data-driven regularization strategies to exploit both the preference covariance amongst users who are in the same group, as well as the contextual relevance of users' individual preferences to each group.
arXiv Detail & Related papers (2020-06-05T23:18:19Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.