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We propose a semi-supervised approach for contemporary object detectors following the teacher-student dual model framework. Our method is featured with 1) the exponential moving averaging strategy to update the teacher from the student…

Computer Vision and Pattern Recognition · Computer Science 2021-06-22 Yihe Tang , Weifeng Chen , Yijun Luo , Yuting Zhang

Techniques for clustering student behaviour offer many opportunities to improve educational outcomes by providing insight into student learning. However, one important aspect of student behaviour, namely its evolution over time, can often…

Machine Learning · Computer Science 2021-10-08 Jessica McBroom , Kalina Yacef , Irena Koprinska

Recently, deep learning has experienced rapid expansion, contributing significantly to the progress of supervised learning methodologies. However, acquiring labeled data in real-world settings can be costly, labor-intensive, and sometimes…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Jicheng Yuan , Anh Le-Tuan , Ali Ganbarov , Manfred Hauswirth , Danh Le-Phuoc

In classroom teaching, student behavior can reflect their learning state and classroom participation, which is of great significance for teaching quality analysis. To address the problems of dense student targets, numerous small objects,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-01 Xiang Gao , Shuai Hang

With the growing advances in deep learning based technologies the detection and identification of co-occurring objects is a challenging task which has many applications in areas such as, security and surveillance. In this paper, we propose…

Computer Vision and Pattern Recognition · Computer Science 2024-07-26 Binay Kumar Singh , Niels Da Vitoria Lobo

Semi-supervised learning, i.e., training networks with both labeled and unlabeled data, has made significant progress recently. However, existing works have primarily focused on image classification tasks and neglected object detection…

Computer Vision and Pattern Recognition · Computer Science 2021-02-19 Yen-Cheng Liu , Chih-Yao Ma , Zijian He , Chia-Wen Kuo , Kan Chen , Peizhao Zhang , Bichen Wu , Zsolt Kira , Peter Vajda

This study presents a novel classroom surveillance system that integrates multiple modalities, including drowsiness, tracking of mobile phone usage, and face recognition,to assess student attentiveness with enhanced precision.The system…

Computer Vision and Pattern Recognition · Computer Science 2025-07-03 Ameer Hamza , Zuhaib Hussain But , Umar Arif , Samiya , M. Abdullah Asad , Muhammad Naeem

This paper presents a task of audio-visual scene classification (SC) where input videos are classified into one of five real-life crowded scenes: 'Riot', 'Noise-Street', 'Firework-Event', 'Music-Event', and 'Sport-Atmosphere'. To this end,…

Computer Vision and Pattern Recognition · Computer Science 2021-12-20 Lam Pham , Dat Ngo , Phu X. Nguyen , Truong Hoang , Alexander Schindler

Visual anomaly detection, an important problem in computer vision, is usually formulated as a one-class classification and segmentation task. The student-teacher (S-T) framework has proved to be effective in solving this challenge. However,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-22 Xuan Zhang , Shiyu Li , Xi Li , Ping Huang , Jiulong Shan , Ting Chen

K-12 classrooms consistently integrate collaboration as part of their learning experiences. However, owing to large classroom sizes, teachers do not have the time to properly assess each student and give them feedback. In this paper we…

Machine Learning · Computer Science 2020-09-04 Anirudh Som , Sujeong Kim , Bladimir Lopez-Prado , Svati Dhamija , Nonye Alozie , Amir Tamrakar

Conventional object detection models are usually limited by the data on which they were trained and by the category logic they define. With the recent rise of Language-Visual Models, new methods have emerged that are not restricted to these…

Computer Vision and Pattern Recognition · Computer Science 2024-09-16 Irina Tolstykh , Mikhail Chernyshov , Maksim Kuprashevich

Large-scale datasets play a vital role in computer vision. But current datasets are annotated blindly without differentiation to samples, making the data collection inefficient and unscalable. The open question is how to build a mega-scale…

Computer Vision and Pattern Recognition · Computer Science 2022-08-26 Yuanhan Zhang , Qinghong Sun , Yichun Zhou , Zexin He , Zhenfei Yin , Kun Wang , Lu Sheng , Yu Qiao , Jing Shao , Ziwei Liu

Visual counting, a task that predicts the number of objects from an image/video, is an open-set problem by nature, i.e., the number of population can vary in $[0,+\infty)$ in theory. However, the collected images and labeled count values…

Computer Vision and Pattern Recognition · Computer Science 2019-08-20 Haipeng Xiong , Hao Lu , Chengxin Liu , Liang Liu , Zhiguo Cao , Chunhua Shen

Scene labeling is a challenging classification problem where each input image requires a pixel-level prediction map. Recently, deep-learning-based methods have shown their effectiveness on solving this problem. However, we argue that the…

Computer Vision and Pattern Recognition · Computer Science 2017-06-12 Zhe Wang , Hongsheng Li , Wanli Ouyang , Xiaogang Wang

The high capacity of deep learning models to learn complex patterns poses a significant challenge when confronted with label noise. The inability to differentiate clean and noisy labels ultimately results in poor generalization. We approach…

Machine Learning · Computer Science 2023-11-27 Eugene Kim

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

Long-tailed datasets are very frequently encountered in real-world use cases where few classes or categories (known as majority or head classes) have higher number of data samples compared to the other classes (known as minority or tail…

Computer Vision and Pattern Recognition · Computer Science 2022-08-23 Saptarshi Sinha , Hiroki Ohashi , Katsuyuki Nakamura

Object detection is a task that performs position identification and label classification of objects in images or videos. The information obtained through this process plays an essential role in various tasks in the field of computer…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Heewon Lee , Sangtae Ahn

Main subjects usually exist in the images or videos, as they are the objects that the photographer wants to highlight. Human viewers can easily identify them but algorithms often confuse them with other objects. Detecting the main subjects…

Computer Vision and Pattern Recognition · Computer Science 2022-09-16 Xin Miao , Jiayi Liu , Huayan Wang , Jun Fu

Supervised deep learning models require significant amount of labeled data to achieve an acceptable performance on a specific task. However, when tested on unseen data, the models may not perform well. Therefore, the models need to be…

Computer Vision and Pattern Recognition · Computer Science 2024-01-01 Akshit Achara , Ram Krishna Pandey