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Weakly-supervised semantic segmentation (WSSS) with image-level labels has been widely studied to relieve the annotation burden of the traditional segmentation task. In this paper, we show that existing fully-annotated base categories can…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Siyuan Zhou , Li Niu , Jianlou Si , Chen Qian , Liqing Zhang

With the increase in the number of image data and the lack of corresponding labels, weakly supervised learning has drawn a lot of attention recently in computer vision tasks, especially in the fine-grained semantic segmentation problem. To…

Computer Vision and Pattern Recognition · Computer Science 2021-10-11 Ke Zhang , Sihong Chen , Qi Ju , Yong Jiang , Yucong Li , Xin He

Engagement detection in online learning environments is vital for improving student outcomes and personalizing instruction. We present ViBED-Net (Video-Based Engagement Detection Network), a novel deep learning framework designed to assess…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Prateek Gothwal , Deeptimaan Banerjee , Ashis Kumer Biswas

3D weakly supervised semantic segmentation (3D WSSS) aims to achieve semantic segmentation by leveraging sparse or low-cost annotated data, significantly reducing reliance on dense point-wise annotations. Previous works mainly employ class…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Xiaoxu Xu , Xuexun Liu , Jinlong Li , Yitian Yuan , Qiudan Zhang , Lin Ma , Nicu Sebe , Xu Wang

Facial emotion recognition (FER) is a fine-grained problem where the value of transfer learning is often assumed. We first quantify this assumption and show that, on AffectNet, training from random initialization with sufficiently strong…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Mahdi Pourmirzaei , Gholam Ali Montazer , Farzaneh Esmaili

Automatic facial expression spotting, which aims to identify facial expression instances in untrimmed videos, is crucial for facial expression analysis. Existing methods primarily focus on fully-supervised learning and rely on costly,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-07 Yicheng Deng , Hideaki Hayashi , Hajime Nagahara

Current weakly supervised video anomaly detection (WSVAD) task aims to achieve frame-level anomalous event detection with only coarse video-level annotations available. Existing works typically involve extracting global features from…

Computer Vision and Pattern Recognition · Computer Science 2024-08-14 Peng Wu , Xuerong Zhou , Guansong Pang , Zhiwei Yang , Qingsen Yan , Peng Wang , Yanning Zhang

Weakly-supervised salient object detection (WSOD) aims to develop saliency models using image-level annotations. Despite of the success of previous works, explorations on an effective training strategy for the saliency network and accurate…

Computer Vision and Pattern Recognition · Computer Science 2021-09-07 Yongri Piao , Jian Wang , Miao Zhang , Zhengxuan Ma , Huchuan Lu

The main obstacle to weakly supervised semantic image segmentation is the difficulty of obtaining pixel-level information from coarse image-level annotations. Most methods based on image-level annotations use localization maps obtained from…

Computer Vision and Pattern Recognition · Computer Science 2019-03-05 Jungbeom Lee , Eunji Kim , Sungmin Lee , Jangho Lee , Sungroh Yoon

Weakly supervised video anomaly detection (WSVAD) is a challenging task. Generating fine-grained pseudo-labels based on weak-label and then self-training a classifier is currently a promising solution. However, since the existing methods…

Computer Vision and Pattern Recognition · Computer Science 2024-04-15 Zhiwei Yang , Jing Liu , Peng Wu

Acquiring sufficient ground-truth supervision to train deep visual models has been a bottleneck over the years due to the data-hungry nature of deep learning. This is exacerbated in some structured prediction tasks, such as semantic…

Computer Vision and Pattern Recognition · Computer Science 2020-12-10 Xueyi Li , Tianfei Zhou , Jianwu Li , Yi Zhou , Zhaoxiang Zhang

Weakly supervised semantic segmentation (WSSS) in histopathology seeks to reduce annotation cost by learning from image-level labels, yet it remains limited by inter-class homogeneity, intra-class heterogeneity, and the region-shrinkage…

Performance in Speech Emotion Recognition (SER) on a single language has increased greatly in the last few years thanks to the use of deep learning techniques. However, cross-lingual SER remains a challenge in real-world applications due to…

How to extract instance-level masks without instance-level supervision is the main challenge of weakly supervised instance segmentation (WSIS). Popular WSIS methods estimate a displacement field (DF) via learning inter-pixel relations and…

Computer Vision and Pattern Recognition · Computer Science 2024-11-20 Tengbo Wang , Yu Bai

Deep Neural Networks have significantly impacted many computer vision tasks. However, their effectiveness diminishes when test data distribution (target domain) deviates from the one of training data (source domain). In situations where…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Andrea Maracani , Lorenzo Rosasco , Lorenzo Natale

Semi-supervised semantic segmentation (SSSS) aims to improve segmentation performance by utilizing large amounts of unlabeled data with limited labeled samples. Existing methods often suffer from coupling, where over-reliance on initial…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Ebenezer Tarubinga , Jenifer Kalafatovich , Seong-Whan Lee

In this work we tackle the task of video-based visual emotion recognition in the wild. Standard methodologies that rely solely on the extraction of bodily and facial features often fall short of accurate emotion prediction in cases where…

Computer Vision and Pattern Recognition · Computer Science 2022-02-03 Ioannis Pikoulis , Panagiotis P. Filntisis , Petros Maragos

Weakly-supervised instance segmentation aims to detect and segment object instances precisely, given imagelevel labels only. Unlike previous methods which are composed of multiple offline stages, we propose Sequential Label Propagation and…

Computer Vision and Pattern Recognition · Computer Science 2020-04-27 Weifeng Ge , Sheng Guo , Weilin Huang , Matthew R. Scott

In the domain of supervised scene flow estimation, the process of manual labeling is both time-intensive and financially demanding. This paper introduces SSFlowNet, a semi-supervised approach for scene flow estimation, that utilizes a blend…

Computer Vision and Pattern Recognition · Computer Science 2024-06-05 Jingze Chen , Junfeng Yao , Qiqin Lin , Rongzhou Zhou , Lei Li

Weakly supervised semantic segmentation aims to achieve pixel-level predictions using image-level labels. Existing methods typically entangle semantic recognition and object localization, which often leads models to focus exclusively on…

Computer Vision and Pattern Recognition · Computer Science 2026-04-17 Qingze He , Fagui Liu , Dengke Zhang , Qingmao Wei , Quan Tang