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Actions are more than just movements and trajectories: we cook to eat and we hold a cup to drink from it. A thorough understanding of videos requires going beyond appearance modeling and necessitates reasoning about the sequence of…

计算机视觉与模式识别 · 计算机科学 2017-07-25 Gunnar A. Sigurdsson , Santosh Divvala , Ali Farhadi , Abhinav Gupta

Temporal point processes (TPPs) are stochastic process models used to characterize event sequences occurring in continuous time. Traditional statistical TPPs have a long-standing history, with numerous models proposed and successfully…

机器学习 · 计算机科学 2025-06-30 Feng Zhou , Quyu Kong , Jie Qiao , Cheng Wan , Yixuan Zhang , Ruichu Cai

Temporal point process is widely used for sequential data modeling. In this paper, we focus on the problem of modeling sequential event propagation in graph, such as retweeting by social network users, news transmitting between websites,…

社会与信息网络 · 计算机科学 2020-05-06 Weichang Wu , Huanxi Liu , Xiaohu Zhang , Yu Liu , Hongyuan Zha

We are now witnessing the increasing availability of event stream data, i.e., a sequence of events with each event typically being denoted by the time it occurs and its mark information (e.g., event type). A fundamental problem is to model…

机器学习 · 计算机科学 2017-02-12 Yongqing Wang , Shenghua Liu , Huawei Shen , Xueqi Cheng

We address the problem of temporal localization of repetitive activities in a video, i.e., the problem of identifying all segments of a video that contain some sort of repetitive or periodic motion. To do so, the proposed method represents…

计算机视觉与模式识别 · 计算机科学 2019-10-15 Giorgos Karvounas , Iason Oikonomidis , Antonis Argyros

Marked Temporal Point Process (MTPP) has been well studied to model the event distribution in marked event streams, which can be used to predict the mark and arrival time of the next event. However, existing studies overlook that the…

机器学习 · 计算机科学 2025-10-27 Sishun Liu , Ke Deng , Yongli Ren , Yan Wang , Xiuzhen Zhang

Human activity, which usually consists of several actions, generally covers interactions among persons and or objects. In particular, human actions involve certain spatial and temporal relationships, are the components of more complicated…

计算机视觉与模式识别 · 计算机科学 2020-06-30 Zhenyu Liu , Yaqiang Yao , Yan Liu , Yuening Zhu , Zhenchao Tao , Lei Wang , Yuhong Feng

Understanding temporal dynamics is critical for conversational agents, enabling effective content analysis and informed decision-making. However, time-aware datasets, particularly for persona-grounded conversations, are still limited, which…

计算与语言 · 计算机科学 2025-02-11 Wanqi Yang , Yanda Li , Meng Fang , Ling Chen

Point-level supervised temporal action localization (PTAL) aims at recognizing and localizing actions in untrimmed videos where only a single point (frame) within every action instance is annotated in training data. Without temporal…

计算机视觉与模式识别 · 计算机科学 2023-10-10 Yuan Yin , Yifei Huang , Ryosuke Furuta , Yoichi Sato

Human activity encompasses a series of complex spatiotemporal processes that are difficult to model, but represents an essential component of human exposure assessment. A significant empirical data source like the American Time Use Survey…

社会与信息网络 · 计算机科学 2019-11-14 Albert M Lund , Ramkiran Gouripeddi , Julio C Facelli

We consider multi-agent systems with heterogeneous, nonlinear agents subject to individual constraints that want to achieve a periodic, dynamic cooperative control goal which can be characterised by a set and a suitable cost. We propose a…

系统与控制 · 电气工程与系统科学 2023-04-07 Matthias Köhler , Matthias A. Müller , Frank Allgöwer

Sequences of labeled events observed at irregular intervals in continuous time are ubiquitous across various fields. Temporal Point Processes (TPPs) provide a mathematical framework for modeling these sequences, enabling inferences such as…

机器学习 · 计算机科学 2024-06-06 Victor Dheur , Tanguy Bosser , Rafael Izbicki , Souhaib Ben Taieb

Sequence prediction on temporal data requires the ability to understand compositional structures of multi-level semantics beyond individual and contextual properties. The task of temporal action segmentation, which aims at translating an…

计算机视觉与模式识别 · 计算机科学 2023-12-08 Dayoung Gong , Joonseok Lee , Deunsol Jung , Suha Kwak , Minsu Cho

Long-term activity forecasting is an especially challenging research problem because it requires understanding the temporal relationships between observed actions, as well as the variability and complexity of human activities. Despite…

计算机视觉与模式识别 · 计算机科学 2023-07-25 Reuben Tan , Matthias De Lange , Michael Iuzzolino , Bryan A. Plummer , Kate Saenko , Karl Ridgeway , Lorenzo Torresani

Temporal Activity Detection aims to predict activity classes per frame, in contrast to video-level predictions in Activity Classification (i.e., Activity Recognition). Due to the expensive frame-level annotations required for detection, the…

计算机视觉与模式识别 · 计算机科学 2023-02-07 Kumara Kahatapitiya , Zhou Ren , Haoxiang Li , Zhenyu Wu , Michael S. Ryoo , Gang Hua

We study the spatio-temporal prediction problem and introduce a novel point-process-based prediction algorithm. Spatio-temporal prediction is extensively studied in Machine Learning literature due to its critical real-life applications such…

机器学习 · 统计学 2021-03-17 Oguzhan Karaahmetoglu , Suleyman S. Kozat

We introduce completion moment detection for actions - the problem of locating the moment of completion, when the action's goal is confidently considered achieved. The paper proposes a joint classification-regression recurrent model that…

计算机视觉与模式识别 · 计算机科学 2018-07-25 Farnoosh Heidarivincheh , Majid Mirmehdi , Dima Damen

Temporal Point Processes (TPP) play an important role in predicting or forecasting events. Although these problems have been studied extensively, predicting multiple simultaneously occurring events can be challenging. For instance, more…

机器学习 · 计算机科学 2023-10-02 Parag Dutta , Kawin Mayilvaghanan , Pratyaksha Sinha , Ambedkar Dukkipati

Attention guides our gaze to fixate the proper location of the scene and holds it in that location for the deserved amount of time given current processing demands, before shifting to the next one. As such, gaze deployment crucially is a…

计算机视觉与模式识别 · 计算机科学 2024-11-01 Alessandro D'Amelio , Giuseppe Cartella , Vittorio Cuculo , Manuele Lucchi , Marcella Cornia , Rita Cucchiara , Giuseppe Boccignone

Temporal Point Processes (TPPs), especially Hawkes Process are commonly used for modeling asynchronous event sequences data such as financial transactions and user behaviors in social networks. Due to the strong fitting ability of neural…

机器学习 · 计算机科学 2024-05-14 Anningzhe Gao , Shan Dai