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We aim for zero-shot localization and classification of human actions in video. Where traditional approaches rely on global attribute or object classification scores for their zero-shot knowledge transfer, our main contribution is a…

Computer Vision and Pattern Recognition · Computer Science 2017-12-14 Pascal Mettes , Cees G. M. Snoek

The goal of this paper is to recognize actions in video without the need for examples. Different from traditional zero-shot approaches we do not demand the design and specification of attribute classifiers and class-to-attribute mappings to…

Computer Vision and Pattern Recognition · Computer Science 2015-10-26 Mihir Jain , Jan C. van Gemert , Thomas Mensink , Cees G. M. Snoek

Incorporating domain-specific priors in search and navigation tasks has shown promising results in improving generalization and sample complexity over end-to-end trained policies. In this work, we study how object embeddings that capture…

Robotics · Computer Science 2021-08-03 Vidhi Jain , Prakhar Agarwal , Shishir Patil , Katia Sycara

Action localization in untrimmed videos is an important topic in the field of video understanding. However, existing action localization methods are restricted to a pre-defined set of actions and cannot localize unseen activities. Thus, we…

Computer Vision and Pattern Recognition · Computer Science 2019-07-01 Zhu Zhang , Zhou Zhao , Zhijie Lin , Jingkuan Song , Deng Cai

Deep-learning and large scale language-image training have produced image object detectors that generalise well to diverse environments and semantic classes. However, single-image object detectors trained on internet data are not optimally…

Robotics · Computer Science 2024-02-07 Nicolas Harvey Chapman , Feras Dayoub , Will Browne , Chris Lehnert

Spatio-temporal action detection encompasses the tasks of localizing and classifying individual actions within a video. Recent works aim to enhance this process by incorporating interaction modeling, which captures the relationship between…

Computer Vision and Pattern Recognition · Computer Science 2024-12-06 Wei-Jhe Huang , Min-Hung Chen , Shang-Hong Lai

In this paper we introduce the problem of Visual Semantic Role Labeling: given an image we want to detect people doing actions and localize the objects of interaction. Classical approaches to action recognition either study the task of…

Computer Vision and Pattern Recognition · Computer Science 2015-05-19 Saurabh Gupta , Jitendra Malik

Human activity recognition is typically addressed by detecting key concepts like global and local motion, features related to object classes present in the scene, as well as features related to the global context. The next open challenges…

Computer Vision and Pattern Recognition · Computer Science 2018-09-21 Fabien Baradel , Natalia Neverova , Christian Wolf , Julien Mille , Greg Mori

Anticipating actions and objects before they start or appear is a difficult problem in computer vision with several real-world applications. This task is challenging partly because it requires leveraging extensive knowledge of the world…

Computer Vision and Pattern Recognition · Computer Science 2016-12-01 Carl Vondrick , Hamed Pirsiavash , Antonio Torralba

In this paper, we show that recent advances in video representation learning and pre-trained vision-language models allow for substantial improvements in self-supervised video object localization. We propose a method that first localizes…

Human environments contain numerous objects configured in a variety of arrangements. Our goal is to enable robots to repose previously unseen objects according to learned semantic relationships in novel environments. We break this problem…

Robotics · Computer Science 2021-08-30 Chris Paxton , Chris Xie , Tucker Hermans , Dieter Fox

We investigate a human-like interpretable model of video understanding. Humans recognise complex activities in video by recognising critical spatio-temporal relations among explicitly recognised objects and parts, for example, an object…

Computer Vision and Pattern Recognition · Computer Science 2024-09-23 Anastasia Anichenko , Frank Guerin , Andrew Gilbert

We present a semi-supervised approach that localizes multiple unknown object instances in long videos. We start with a handful of labeled boxes and iteratively learn and label hundreds of thousands of object instances. We propose criteria…

Computer Vision and Pattern Recognition · Computer Science 2015-05-22 Ishan Misra , Abhinav Shrivastava , Martial Hebert

The task of action recognition or action detection involves analyzing videos and determining what action or motion is being performed. The primary subject of these videos are predominantly humans performing some action. However, this…

Computer Vision and Pattern Recognition · Computer Science 2019-01-29 Amlaan Bhoi

We present a method to learn a joint multimodal representation space that enables recognition of unseen activities in videos. We first compare the effect of placing various constraints on the embedding space using paired text and video…

Computer Vision and Pattern Recognition · Computer Science 2020-07-08 AJ Piergiovanni , Michael S. Ryoo

In video analysis, understanding the temporal context is crucial for recognizing object interactions, event patterns, and contextual changes over time. The proposed model leverages adjacency and semantic similarities between objects from…

Computer Vision and Pattern Recognition · Computer Science 2024-08-26 Ahnaf Farhan , M. Shahriar Hossain

This work addresses the problem of recognizing action categories in videos when no training examples are available. The current state-of-the-art enables such a zero-shot recognition by learning universal mappings from videos to a semantic…

Computer Vision and Pattern Recognition · Computer Science 2023-08-02 Pascal Mettes

Human actions often involve complex interactions across several inter-related objects in the scene. However, existing approaches to fine-grained video understanding or visual relationship detection often rely on single object representation…

Computer Vision and Pattern Recognition · Computer Science 2018-03-22 Chih-Yao Ma , Asim Kadav , Iain Melvin , Zsolt Kira , Ghassan AlRegib , Hans Peter Graf

This paper strives for spatio-temporal localization of human actions in videos. In the literature, the consensus is to achieve localization by training on bounding box annotations provided for each frame of each training video. As…

Computer Vision and Pattern Recognition · Computer Science 2018-10-02 Pascal Mettes , Cees G. M. Snoek

Understanding the structure of complex activities in untrimmed videos is a challenging task in the area of action recognition. One problem here is that this task usually requires a large amount of hand-annotated minute- or even hour-long…

Computer Vision and Pattern Recognition · Computer Science 2020-10-01 Rosaura G. VidalMata , Walter J. Scheirer , Anna Kukleva , David Cox , Hilde Kuehne
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