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Weakly-supervised temporal action localization aims to localize and recognize actions in untrimmed videos with only video-level category labels during training. Without instance-level annotations, most existing methods follow the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Huan Ren , Wenfei Yang , Tianzhu Zhang , Yongdong Zhang

In minimally invasive surgery, surgical instrument localization is a crucial task for endoscopic videos, which enables various applications for improving surgical outcomes. However, annotating the instrument localization in endoscopic…

Image and Video Processing · Electrical Eng. & Systems 2024-06-24 Rongfeng Wei , Jinlin Wu , Xuexue Bai , Ming Feng , Zhen Lei , Hongbin Liu , Zhen Chen

Weakly supervised video anomaly detection (WS-VAD) is a challenging problem that aims to learn VAD models only with video-level annotations. In this work, we propose a Long-Short Temporal Co-teaching (LSTC) method to address the WS-VAD…

Computer Vision and Pattern Recognition · Computer Science 2023-04-05 Shengyang Sun , Xiaojin Gong

Weakly supervised object detection aims at reducing the amount of supervision required to train detection models. Such models are traditionally learned from images/videos labelled only with the object class and not the object bounding box.…

Computer Vision and Pattern Recognition · Computer Science 2019-04-04 Zhenheng Yang , Dhruv Mahajan , Deepti Ghadiyaram , Ram Nevatia , Vignesh Ramanathan

Object localization is a hot issue in computer vision area, which aims to identify and determine the precise location of specific objects from image or video. Most existing object localization methods heavily rely on extensive labeled data,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-19 Jingjing Wang , Xinglin Piao , Zongzhi Gao , Bo Li , Yong Zhang , Baocai Yin

Image-level weakly supervised semantic segmentation is a challenging task that has been deeply studied in recent years. Most of the common solutions exploit class activation map (CAM) to locate object regions. However, such response maps…

Computer Vision and Pattern Recognition · Computer Science 2023-10-02 Yukun Su , Jingliang Deng , Zonghan Li

Visual SLAM - Simultaneous Localization and Mapping - in dynamic environments typically relies on identifying and masking image features on moving objects to prevent them from negatively affecting performance. Current approaches are…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Adrian Bojko , Romain Dupont , Mohamed Tamaazousti , Hervé Le Borgne

Extracting class activation maps (CAM) from a classification model often results in poor coverage on foreground objects, i.e., only the discriminative region (e.g., the "head" of "sheep") is recognized and the rest (e.g., the "leg" of…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Zhaozheng Chen , Qianru Sun

The co-localization problem is a model that simultaneously localizes objects of the same class within a series of images or videos. In \cite{joulin2014efficient}, authors present new variants of the Frank-Wolfe algorithm (aka conditional…

Computer Vision and Pattern Recognition · Computer Science 2023-07-11 Hamid Nazari

Weakly supervised object localization (WSOL) aims at predicting object locations in an image using only image-level category labels. Common challenges that image classification models encounter when localizing objects are, (a) they tend to…

Computer Vision and Pattern Recognition · Computer Science 2022-04-15 Saurav Gupta , Sourav Lakhotia , Abhay Rawat , Rahul Tallamraju

We propose a new video camouflaged object detection (VCOD) framework that can exploit both short-term dynamics and long-term temporal consistency to detect camouflaged objects from video frames. An essential property of camouflaged objects…

Computer Vision and Pattern Recognition · Computer Science 2022-03-16 Xuelian Cheng , Huan Xiong , Deng-Ping Fan , Yiran Zhong , Mehrtash Harandi , Tom Drummond , Zongyuan Ge

Weakly supervised temporal action localization (WTAL) aims to detect action instances in untrimmed videos using only video-level annotations. Since many existing works optimize WTAL models based on action classification labels, they…

Computer Vision and Pattern Recognition · Computer Science 2024-08-13 Geuntaek Lim , Hyunwoo Kim , Joonsoo Kim , Yukyung Choi

The goal of this work is spatio-temporal action localization in videos, using only the supervision from video-level class labels. The state-of-the-art casts this weakly-supervised action localization regime as a Multiple Instance Learning…

Computer Vision and Pattern Recognition · Computer Science 2018-11-26 Pascal Mettes , Cees G. M. Snoek

Spatiotemporal action recognition is the task of locating and classifying actions in videos. Our project applies this task to analyzing video footage of restaurant workers preparing food, for which potential applications include automated…

Computer Vision and Pattern Recognition · Computer Science 2020-08-26 Akshat Gupta , Milan Desai , Wusheng Liang , Magesh Kannan

Zero-Shot Temporal Action Localization (ZS-TAL) seeks to identify and locate actions in untrimmed videos unseen during training. Existing ZS-TAL methods involve fine-tuning a model on a large amount of annotated training data. While…

Computer Vision and Pattern Recognition · Computer Science 2024-04-12 Benedetta Liberatori , Alessandro Conti , Paolo Rota , Yiming Wang , Elisa Ricci

While class activation map (CAM) generated by image classification network has been widely used for weakly supervised object localization (WSOL) and semantic segmentation (WSSS), such classifiers usually focus on discriminative object…

Computer Vision and Pattern Recognition · Computer Science 2022-12-23 Jinheng Xie , Jianfeng Xiang , Junliang Chen , Xianxu Hou , Xiaodong Zhao , Linlin Shen

Different from general object detection, moving infrared small target detection faces huge challenges due to tiny target size and weak background contrast.Currently, most existing methods are fully-supervised, heavily relying on a large…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Weiwei Duan , Luping Ji , Shengjia Chen , Sicheng Zhu , Jianghong Huang , Mao Ye

Class activation maps (CAMs) are commonly employed in weakly supervised semantic segmentation (WSSS) to produce pseudo-labels. Due to incomplete or excessive class activation, existing studies often resort to offline CAM refinement,…

Computer Vision and Pattern Recognition · Computer Science 2024-07-11 Xinyu Yang , Hossein Rahmani , Sue Black , Bryan M. Williams

It has been widely known that CAM (Class Activation Map) usually only activates discriminative object regions and falsely includes lots of object-related backgrounds. As only a fixed set of image-level object labels are available to the…

Computer Vision and Pattern Recognition · Computer Science 2022-03-28 Jinheng Xie , Xianxu Hou , Kai Ye , Linlin Shen

Camouflaged object segmentation presents unique challenges compared to traditional segmentation tasks, primarily due to the high similarity in patterns and colors between camouflaged objects and their backgrounds. Effective solutions to…

Computer Vision and Pattern Recognition · Computer Science 2025-07-22 Wenqi Guo , Mohamed Shehata , Shan Du