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Weakly-supervised Temporal Action Localization (WTAL) aims to detect the action segments with only video-level action labels in training. The key challenge is how to distinguish the action of interest segments from the background, which is…

Computer Vision and Pattern Recognition · Computer Science 2021-04-01 Yuan Liu , Jingyuan Chen , Zhenfang Chen , Bing Deng , Jianqiang Huang , Hanwang Zhang

Weakly-supervised Temporal Action Localization (W-TAL) aims to classify and localize all action instances in an untrimmed video under only video-level supervision. However, without frame-level annotations, it is challenging for W-TAL…

Computer Vision and Pattern Recognition · Computer Science 2020-10-23 Yuanhao Zhai , Le Wang , Wei Tang , Qilin Zhang , Junsong Yuan , Gang Hua

Recent progress in Temporal Action Segmentation (TAS) has increasingly relied on complex architectures, which can hinder practical deployment. We present a lightweight dual-loss training framework that improves fine-grained segmentation…

Computer Vision and Pattern Recognition · Computer Science 2026-04-03 Hinako Mitsuoka , Kazuhiro Hotta

Cross-Domain Few-Shot Learning (CDFSL) adapts models trained with large-scale general data (source domain) to downstream target domains with only scarce training data, where the research on vision-language models (e.g., CLIP) is still in…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Yaze Zhao , Yixiong Zou , Yuhua Li , Ruixuan Li

Contrastive learning is a well-established paradigm in representation learning. The standard framework of contrastive learning minimizes the distance between "similar" instances and maximizes the distance between dissimilar ones in the…

Machine Learning · Computer Science 2025-02-06 Naghmeh Ghanooni , Barbod Pajoum , Harshit Rawal , Sophie Fellenz , Vo Nguyen Le Duy , Marius Kloft

Weakly-supervised action localization requires training a model to localize the action segments in the video given only video level action label. It can be solved under the Multiple Instance Learning (MIL) framework, where a bag (video)…

Computer Vision and Pattern Recognition · Computer Science 2020-12-23 Zhekun Luo , Devin Guillory , Baifeng Shi , Wei Ke , Fang Wan , Trevor Darrell , Huijuan Xu

Weakly Supervised Object Detection (WSOD), using only image-level annotations to train object detectors, is of growing importance in object recognition. In this paper, we propose a novel deep network for WSOD. Unlike previous networks that…

Computer Vision and Pattern Recognition · Computer Science 2018-10-16 Peng Tang , Xinggang Wang , Song Bai , Wei Shen , Xiang Bai , Wenyu Liu , Alan Yuille

Chromosome recognition is an essential task in karyotyping, which plays a vital role in birth defect diagnosis and biomedical research. However, existing classification methods face significant challenges due to the inter-class similarity…

Computer Vision and Pattern Recognition · Computer Science 2023-12-14 Ruijia Chang , Suncheng Xiang , Chengyu Zhou , Kui Su , Dahong Qian , Jun Wang

We present a method for weakly-supervised action localization based on graph convolutions. In order to find and classify video time segments that correspond to relevant action classes, a system must be able to both identify discriminative…

Computer Vision and Pattern Recognition · Computer Science 2020-02-05 Maheen Rashid , Hedvig Kjellström , Yong Jae Lee

Weakly Supervised Semantic Segmentation (WSSS) with image-level labels has gained attention for its cost-effectiveness. Most existing methods emphasize inter-class separation, often neglecting the shared semantics among related categories…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Wangyu Wu , Zhenhong Chen , Xiaowen Ma , Wenqiao Zhang , Xianglin Qiu , Siqi Song , Xiaowei Huang , Fei Ma , Jimin Xiao

Detecting lane markings in road scenes poses a challenge due to their intricate nature, which is susceptible to unfavorable conditions. While lane markings have strong shape priors, their visibility is easily compromised by lighting…

Computer Vision and Pattern Recognition · Computer Science 2024-08-21 Ali Zoljodi , Sadegh Abadijou , Mina Alibeigi , Masoud Daneshtalab

Few-shot learning (FSL) often requires effective adaptation of models using limited labeled data. However, most existing FSL methods rely on entangled representations, requiring the model to implicitly recover the unmixing process to obtain…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Tianjiao Jiang , Zhen Zhang , Yuhang Liu , Javen Qinfeng Shi

Contrastive learning is a family of self-supervised methods where a model is trained to solve a classification task constructed from unlabeled data. It has recently emerged as one of the leading learning paradigms in the absence of labels…

Machine Learning · Statistics 2021-03-05 Bingbin Liu , Pradeep Ravikumar , Andrej Risteski

Temporal action localization is an important task of computer vision. Though many methods have been proposed, it still remains an open question how to predict the temporal location of action segments precisely. Most state-of-the-art works…

Computer Vision and Pattern Recognition · Computer Science 2019-02-15 Ke Yang , Xiaolong Shen , Peng Qiao , Shijie Li , Dongsheng Li , Yong Dou

Vision-language models such as CLIP have shown impressive capabilities in aligning images and text, but they often struggle with lengthy and detailed text descriptions due to pre-training on short and concise captions. We present FAST-GOAL…

Artificial Intelligence · Computer Science 2026-05-27 Hyungyu Choi , Young Kyun Jang , Chanho Eom

Anomaly activities such as robbery, explosion, accidents, etc. need immediate actions for preventing loss of human life and property in real world surveillance systems. Although the recent automation in surveillance systems are capable of…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Snehashis Majhi , Srijan Das , Francois Bremond , Ratnakar Dash , Pankaj Kumar Sa

Video-Language Pre-training models have recently significantly improved various multi-modal downstream tasks. Previous dominant works mainly adopt contrastive learning to achieve global feature alignment across modalities. However, the…

Computer Vision and Pattern Recognition · Computer Science 2023-01-19 Fan Ma , Xiaojie Jin , Heng Wang , Jingjia Huang , Linchao Zhu , Jiashi Feng , Yi Yang

Fine-grained category discovery using only coarse-grained supervision is a cost-effective yet challenging task. Previous training methods focus on aligning query samples with positive samples and distancing them from negatives. They often…

Artificial Intelligence · Computer Science 2025-02-07 Chang Tian , Matthew B. Blaschko , Wenpeng Yin , Mingzhe Xing , Yinliang Yue , Marie-Francine Moens

Fine-grained action recognition (FGAR) aims to identify subtle and distinctive differences among fine-grained action categories. However, current recognition methods often capture coarse-grained motion patterns but struggle to identify…

Computer Vision and Pattern Recognition · Computer Science 2025-11-27 Baoli Sun , Yihan Wang , Xinzhu Ma , Zhihui Wang , Kun Lu , Zhiyong Wang

Weakly-supervised temporal action localization (WTAL) aims to recognize and localize action instances with only video-level labels. Despite the significant progress, existing methods suffer from severe performance degradation when…

Computer Vision and Pattern Recognition · Computer Science 2024-04-23 Yangcen Liu , Ziyi Liu , Yuanhao Zhai , Wen Li , David Doerman , Junsong Yuan
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