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We address an essential problem in computer vision, that of unsupervised object segmentation in video, where a main object of interest in a video sequence should be automatically separated from its background. An efficient solution to this…

Computer Vision and Pattern Recognition · Computer Science 2017-04-20 Emanuela Haller , Marius Leordeanu

Recent open-vocabulary detection methods aim to detect novel objects by distilling knowledge from vision-language models (VLMs) trained on a vast amount of image-text pairs. To improve the effectiveness of these methods, researchers have…

Computer Vision and Pattern Recognition · Computer Science 2023-03-24 Han-Cheol Cho , Won Young Jhoo , Wooyoung Kang , Byungseok Roh

With a focus on abnormal events contained within untrimmed videos, there is increasing interest among researchers in video anomaly detection. Among different video anomaly detection scenarios, weakly-supervised video anomaly detection poses…

Computer Vision and Pattern Recognition · Computer Science 2023-09-29 Yidan Fan , Yongxin Yu , Wenhuan Lu , Yahong Han

Detecting deepfake videos is highly challenging given the complexity of characterizing spatio-temporal artifacts. Most existing methods rely on binary classifiers trained using real and fake image sequences, therefore hindering their…

Computer Vision and Pattern Recognition · Computer Science 2025-07-22 Dat Nguyen , Marcella Astrid , Anis Kacem , Enjie Ghorbel , Djamila Aouada

Due to the high cost of annotating accurate pixel-level labels, semi-supervised learning has emerged as a promising approach for cloud detection. In this paper, we propose CloudMatch, a semi-supervised framework that effectively leverages…

Computer Vision and Pattern Recognition · Computer Science 2026-01-08 Jiayi Zhao , Changlu Chen , Jingsheng Li , Tianxiang Xue , Kun Zhan

We propose a simple, yet powerful approach for unsupervised object segmentation in videos. We introduce an objective function whose minimum represents the mask of the main salient object over the input sequence. It only relies on…

Computer Vision and Pattern Recognition · Computer Science 2022-10-20 Georgy Ponimatkin , Nermin Samet , Yang Xiao , Yuming Du , Renaud Marlet , Vincent Lepetit

Weakly supervised temporal action detection is a Herculean task in understanding untrimmed videos, since no supervisory signal except the video-level category label is available on training data. Under the supervision of category labels,…

Computer Vision and Pattern Recognition · Computer Science 2018-07-19 Jia-Xing Zhong , Nannan Li , Weijie Kong , Tao Zhang , Thomas H. Li , Ge Li

Semi-supervised object detection (SSOD) aims to boost detection performance by leveraging extra unlabeled data. The teacher-student framework has been shown to be promising for SSOD, in which a teacher network generates pseudo-labels for…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Honggyu Choi , Zhixiang Chen , Xuepeng Shi , Tae-Kyun Kim

While numerous 3D detection works leverage the complementary relationship between RGB images and point clouds, developments in the broader framework of semi-supervised object recognition remain uninfluenced by multi-modal fusion. Current…

Computer Vision and Pattern Recognition · Computer Science 2022-03-18 Jinhyung Park , Chenfeng Xu , Yiyang Zhou , Masayoshi Tomizuka , Wei Zhan

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

Semi-supervised 3D object detection from point cloud aims to train a detector with a small number of labeled data and a large number of unlabeled data. The core of existing methods lies in how to select high-quality pseudo-labels using the…

Computer Vision and Pattern Recognition · Computer Science 2023-12-19 ChuXin Wang , Wenfei Yang , Tianzhu Zhang

Semi-supervised video object segmentation is a task of segmenting the target object in a video sequence given only a mask annotation in the first frame. The limited information available makes it an extremely challenging task. Most previous…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Yunyao Mao , Ning Wang , Wengang Zhou , Houqiang Li

Weakly-supervised audio-visual video parsing (AVVP) seeks to detect audible, visible, and audio-visual events without temporal annotations. Previous work has emphasized refining global predictions through contrastive or collaborative…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Yaru Chen , Ruohao Guo , Liting Gao , Yang Xiang , Qingyu Luo , Zhenbo Li , Wenwu Wang

In this paper, we address the problem of enhancing perceptual quality in video super-resolution (VSR) using Diffusion Models (DMs) while ensuring temporal consistency among frames. We present StableVSR, a VSR method based on DMs that can…

Computer Vision and Pattern Recognition · Computer Science 2024-07-18 Claudio Rota , Marco Buzzelli , Joost van de Weijer

3D object detection is essential for autonomous driving and robotic perception, yet its reliance on large-scale manually annotated data limits scalability and adaptability. To reduce annotation dependency, unsupervised and…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Yushen He , Lei Zhao , Weidong Chen

Unsupervised video object learning seeks to decompose video scenes into structural object representations without any supervision from depth, optical flow, or segmentation. We present VONet, an innovative approach that is inspired by MONet.…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Haonan Yu , Wei Xu

Monocular 3D object detection poses a significant challenge in 3D scene understanding due to its inherently ill-posed nature in monocular depth estimation. Existing methods heavily rely on supervised learning using abundant 3D labels,…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Zihua Liu , Hiroki Sakuma , Masatoshi Okutomi

Unsupervised image segmentation is a critical task in computer vision. It enables dense scene understanding without human annotations, which is especially valuable in domains where labelled data is scarce. However, existing methods often…

Computer Vision and Pattern Recognition · Computer Science 2026-02-16 Boujemaa Guermazi , Riadh Ksantini , Naimul Khan

Conventional video segmentation approaches rely heavily on appearance models. Such methods often use appearance descriptors that have limited discriminative power under complex scenarios. To improve the segmentation performance, this paper…

Computer Vision and Pattern Recognition · Computer Science 2018-03-26 Wenguan Wang , Jianbing Shen , Fatih Porikli

Dense Video Object Captioning (DVOC) is the task of jointly detecting, tracking, and captioning object trajectories in a video, requiring the ability to understand spatio-temporal details and describe them in natural language. Due to the…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Gabriel Fiastre , Antoine Yang , Cordelia Schmid