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Supervised learning-based segmentation methods typically require a large number of annotated training data to generalize well at test time. In medical applications, curating such datasets is not a favourable option because acquiring a large…

Image and Video Processing · Electrical Eng. & Systems 2020-11-20 Krishna Chaitanya , Neerav Karani , Christian F. Baumgartner , Ertunc Erdil , Anton Becker , Olivio Donati , Ender Konukoglu

This work presents the first condensation approach for procedural video datasets used in temporal action segmentation. We propose a condensation framework that leverages generative prior learned from the dataset and network inversion to…

Computer Vision and Pattern Recognition · Computer Science 2025-03-19 Guodong Ding , Rongyu Chen , Angela Yao

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

Our objective in this work is fine-grained classification of actions in untrimmed videos, where the actions may be temporally extended or may span only a few frames of the video. We cast this into a query-response mechanism, where each…

Computer Vision and Pattern Recognition · Computer Science 2021-04-20 Chuhan Zhang , Ankush Gupta , Andrew Zisserman

In this paper, we study the problem of weakly-supervised temporal grounding of sentence in video. Specifically, given an untrimmed video and a query sentence, our goal is to localize a temporal segment in the video that semantically…

Computer Vision and Pattern Recognition · Computer Science 2020-01-28 Zhenfang Chen , Lin Ma , Wenhan Luo , Peng Tang , Kwan-Yee K. Wong

Nighttime semantic segmentation plays a crucial role in practical applications, such as autonomous driving, where it frequently encounters difficulties caused by inadequate illumination conditions and the absence of well-annotated datasets.…

Computer Vision and Pattern Recognition · Computer Science 2024-03-15 Jingyi Pan , Sihang Li , Yucheng Chen , Jinjing Zhu , Lin Wang

In this paper, the main task we aim to tackle is the multi-instance semi-supervised video object segmentation across a sequence of frames where only the first-frame box-level ground-truth is provided. Detection-based algorithms are widely…

Computer Vision and Pattern Recognition · Computer Science 2020-04-17 Mingjie Sun , Jimin Xiao , Eng Gee Lim , Bingfeng Zhang , Yao Zhao

Temporal Action Localization (TAL) has garnered significant attention in information retrieval. Existing supervised or weakly supervised methods heavily rely on labeled temporal boundaries and action categories, which are labor-intensive…

Computer Vision and Pattern Recognition · Computer Science 2025-06-06 Rui Xia , Dan Jiang , Quan Zhang , Ke Zhang , Chun Yuan

Referring Audio-Visual Segmentation (Ref-AVS) aims to segment target objects in audible videos based on given reference expressions. Prior works typically rely on learning latent embeddings via multimodal fusion to prompt a tunable SAM/SAM2…

Multimedia · Computer Science 2025-08-07 Jinxing Zhou , Yanghao Zhou , Mingfei Han , Tong Wang , Xiaojun Chang , Hisham Cholakkal , Rao Muhammad Anwer

Human motion capture data has been widely used in data-driven character animation. In order to generate realistic, natural-looking motions, most data-driven approaches require considerable efforts of pre-processing, including motion…

Computer Vision and Pattern Recognition · Computer Science 2019-03-05 Noshaba Cheema , Somayeh Hosseini , Janis Sprenger , Erik Herrmann , Han Du , Klaus Fischer , Philipp Slusallek

The recognition of human activities is one of the key problems in video understanding. Action recognition is challenging even for specific categories of videos, such as sports, that contain only a small set of actions. Interestingly, sports…

Multimedia · Computer Science 2017-09-28 Rahul Anand Sharma , Pramod Sankar K , CV Jawahar

In this work, we address the task of weakly-supervised human action segmentation in long, untrimmed videos. Recent methods have relied on expensive learning models, such as Recurrent Neural Networks (RNN) and Hidden Markov Models (HMM).…

Computer Vision and Pattern Recognition · Computer Science 2023-05-22 Li Ding , Chenliang Xu

Video Instance Segmentation (VIS) jointly tackles multi-object detection, tracking, and segmentation in video sequences. In the past, VIS methods mirrored the fragmentation of these subtasks in their architectural design, hence missing out…

Computer Vision and Pattern Recognition · Computer Science 2022-07-25 Adrià Caelles , Tim Meinhardt , Guillem Brasó , Laura Leal-Taixé

In industrial settings, weakly supervised (WS) methods are usually preferred over their fully supervised (FS) counterparts as they do not require costly manual annotations. Unfortunately, the segmentation masks obtained in the WS regime are…

Computer Vision and Pattern Recognition · Computer Science 2025-02-04 Andrea Marelli , Luca Magri , Federica Arrigoni , Giacomo Boracchi

Video ads segmentation and tagging is a challenging task due to two main reasons: (1) the video scene structure is complex and (2) it includes multiple modalities (e.g., visual, audio, text.). While previous work focuses mostly on activity…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Tomoyuki Suzuki , Antonio Tejero-de-Pablos

Long-form video understanding requires designing approaches that are able to temporally localize activities or language. End-to-end training for such tasks is limited by the compute device memory constraints and lack of temporal annotations…

Computer Vision and Pattern Recognition · Computer Science 2022-04-27 Mengmeng Xu , Erhan Gundogdu , Maksim Lapin , Bernard Ghanem , Michael Donoser , Loris Bazzani

A primary challenge faced in few-shot action recognition is inadequate video data for training. To address this issue, current methods in this field mainly focus on devising algorithms at the feature level while little attention is paid to…

Computer Vision and Pattern Recognition · Computer Science 2022-12-23 Huabin Liu , Weixian Lv , John See , Weiyao Lin

Delineating anatomical regions is a key task in medical image analysis. Manual segmentation achieves high accuracy but is labor-intensive and prone to variability, thus prompting the development of automated approaches. Recently, a breadth…

Image and Video Processing · Electrical Eng. & Systems 2025-11-05 Alix de Langlais , Benjamin Billot , Théo Aguilar Vidal , Marc-Olivier Gauci , Hervé Delingette

Most existing real-time deep models trained with each frame independently may produce inconsistent results across the temporal axis when tested on a video sequence. A few methods take the correlations in the video sequence into…

Computer Vision and Pattern Recognition · Computer Science 2022-02-28 Yifan Liu , Chunhua Shen , Changqian Yu , Jingdong Wang

Embodied intelligence relies on accurately segmenting objects actively involved in interactions. Action-based video object segmentation addresses this by linking segmentation with action semantics, but it depends on large-scale annotations…

Computer Vision and Pattern Recognition · Computer Science 2026-03-05 Wenxin Li , Kunyu Peng , Di Wen , Ruiping Liu , Mengfei Duan , Kai Luo , Kailun Yang