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Self-supervised instance discrimination is an effective contrastive pretext task to learn feature representations and address limited medical image annotations. The idea is to make features of transformed versions of the same images similar…

计算机视觉与模式识别 · 计算机科学 2022-11-17 Yejia Zhang , Xinrong Hu , Nishchal Sapkota , Yiyu Shi , Danny Z. Chen

Anomaly detection in surveillance videos remains a challenging task due to the diversity of abnormal events, class imbalance, and scene-dependent visual clutter. To address these issues, we propose a robust deep learning framework that…

计算机视觉与模式识别 · 计算机科学 2025-10-28 Mohammad Ali Etemadi Naeen , Hoda Mohammadzade , Saeed Bagheri Shouraki

Autonomous driving technology has advanced significantly, yet detecting driving anomalies remains a major challenge due to the long-tailed distribution of driving events. Existing methods primarily rely on single-modal road condition video…

计算机视觉与模式识别 · 计算机科学 2025-02-06 Long Zhouxiang , Ovanes Petrosian

Instance-level contrastive learning techniques, which rely on data augmentation and a contrastive loss function, have found great success in the domain of visual representation learning. They are not suitable for exploiting the rich…

计算机视觉与模式识别 · 计算机科学 2021-10-22 Martine Toering , Ioannis Gatopoulos , Maarten Stol , Vincent Tao Hu

Video salient object detection aims to find the most visually distinctive objects in a video. To explore the temporal dependencies, existing methods usually resort to recurrent neural networks or optical flow. However, these approaches…

计算机视觉与模式识别 · 计算机科学 2021-11-04 Yi-Wen Chen , Xiaojie Jin , Xiaohui Shen , Ming-Hsuan Yang

Unsupervised domain adaptive (UDA) algorithms can markedly enhance the performance of object detectors under conditions of domain shifts, thereby reducing the necessity for extensive labeling and retraining. Current domain adaptive object…

计算机视觉与模式识别 · 计算机科学 2024-12-17 Tianheng Qiu , Ka Lung Law , Guanghua Pan , Jufei Wang , Xin Gao , Xuan Huang , Hu Wei

Anomaly detection from graph data has drawn much attention due to its practical significance in many critical applications including cybersecurity, finance, and social networks. Existing data mining and machine learning methods are either…

机器学习 · 计算机科学 2022-01-25 Yu Zheng , Ming Jin , Yixin Liu , Lianhua Chi , Khoa T. Phan , Yi-Ping Phoebe Chen

Existing approaches for unsupervised metric learning focus on exploring self-supervision information within the input image itself. We observe that, when analyzing images, human eyes often compare images against each other instead of…

计算机视觉与模式识别 · 计算机科学 2020-08-12 Yang Li , Shichao Kan , Zhihai He

Distracted driving remains a significant global challenge with severe human and economic repercussions, demanding improved detection and intervention strategies. While previous studies have extensively explored single-modality approaches,…

计算机视觉与模式识别 · 计算机科学 2025-01-22 Anthony. Dontoh , Stephanie. Ivey , Logan. Sirbaugh , Armstrong. Aboah

Lane detection models are often evaluated in a closed-world setting, where training and testing occur on the same dataset. We observe that, even within the same domain, cross-dataset distribution shifts can cause severe catastrophic…

计算机视觉与模式识别 · 计算机科学 2025-07-28 Mohammed Abdul Hafeez Khan , Parth Ganeriwala , Sarah M. Lehman , Siddhartha Bhattacharyya , Amy Alvarez , Natasha Neogi

Complex data mining has wide application value in many fields, especially in the feature extraction and classification tasks of unlabeled data. This paper proposes an algorithm based on self-supervised learning and verifies its…

机器学习 · 计算机科学 2025-04-08 Yingbin Liang , Lu Dai , Shuo Shi , Minghao Dai , Junliang Du , Haige Wang

In time series anomaly detection (TSAD), the scarcity of labeled data poses a challenge to the development of accurate models. Unsupervised domain adaptation (UDA) offers a solution by leveraging labeled data from a related domain to detect…

Most advanced unsupervised anomaly detection (UAD) methods rely on modeling feature representations of frozen encoder networks pre-trained on large-scale datasets, e.g. ImageNet. However, the features extracted from the encoders that are…

计算机视觉与模式识别 · 计算机科学 2023-10-25 Jia Guo , Shuai Lu , Lize Jia , Weihang Zhang , Huiqi Li

Contrastive learning has gained popularity and pushes state-of-the-art performance across numerous large-scale benchmarks. In contrastive learning, the contrastive loss function plays a pivotal role in discerning similarities between…

计算机视觉与模式识别 · 计算机科学 2025-12-03 Haojin Deng , Yimin Yang

Traffic anomaly detection (TAD) in driving videos is critical for ensuring the safety of autonomous driving and advanced driver assistance systems. Previous single-stage TAD methods primarily rely on frame prediction, making them vulnerable…

计算机视觉与模式识别 · 计算机科学 2024-04-16 Rongqin Liang , Yuanman Li , Jiantao Zhou , Xia Li

We study self-supervised video representation learning, which is a challenging task due to 1) lack of labels for explicit supervision; 2) unstructured and noisy visual information. Existing methods mainly use contrastive loss with video…

计算机视觉与模式识别 · 计算机科学 2021-08-18 Deng Huang , Wenhao Wu , Weiwen Hu , Xu Liu , Dongliang He , Zhihua Wu , Xiangmiao Wu , Mingkui Tan , Errui Ding

Anomaly detection is important in many real-life applications. Recently, self-supervised learning has greatly helped deep anomaly detection by recognizing several geometric transformations. However these methods lack finer features, usually…

计算机视觉与模式识别 · 计算机科学 2022-12-12 Loic Jezequel , Ngoc-Son Vu , Jean Beaudet , Aymeric Histace

For the Facial Action Unit (AU) detection task, accurately capturing the subtle facial differences between distinct AUs is essential for reliable detection. Additionally, AU detection faces challenges from class imbalance and the presence…

计算机视觉与模式识别 · 计算机科学 2025-12-01 Ziqiao Shang , Bin Liu , Fengmao Lv , Fei Teng , Tianrui Li , Lan-Zhe Guo

Distribution shifts are problems where the distribution of data changes between training and testing, which can significantly degrade the performance of a model deployed in the real world. Recent studies suggest that one reason for the…

机器学习 · 计算机科学 2023-04-10 Takuro Kutsuna

Driving behavior monitoring plays a crucial role in managing road safety and decreasing the risk of traffic accidents. Driving behavior is affected by multiple factors like vehicle characteristics, types of roads, traffic, but, most…

机器学习 · 计算机科学 2022-05-18 Soma Bandyopadhyay , Anish Datta , Shruti Sachan , Arpan Pal