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Neural networks can learn spurious correlations in the data, often leading to performance degradation for underrepresented subgroups. Studies have demonstrated that the disparity is amplified when knowledge is distilled from a complex…

机器学习 · 计算机科学 2025-11-11 Patrik Kenfack , Ulrich Aïvodji , Samira Ebrahimi Kahou

We present a simple but effective pixel-level self-supervised distillation framework friendly to dense prediction tasks. Our method, called Pixel-Wise Contrastive Distillation (PCD), distills knowledge by attracting the corresponding pixels…

计算机视觉与模式识别 · 计算机科学 2024-04-17 Junqiang Huang , Zichao Guo

Graph anomaly detection aims to identify unusual patterns in graph-based data, with wide applications in fields such as web security and financial fraud detection. Existing methods typically rely on contrastive learning, assuming that a…

机器学习 · 计算机科学 2025-05-26 Di Jin , Jingyi Cao , Xiaobao Wang , Bingdao Feng , Dongxiao He , Longbiao Wang , Jianwu Dang

Distance-based anomaly detection methods rely on compact in-distribution (ID) embeddings that are well separated from anomalies. However, conventional contrastive learning strategies often struggle to achieve this balance, either promoting…

机器学习 · 计算机科学 2026-02-02 Willian T. Lunardi , Abdulrahman Banabila , Dania Herzalla , Martin Andreoni

Knowledge Distillation-based Anomaly Detection (KDAD) methods rely on the teacher-student paradigm to detect and segment anomalous regions by contrasting the unique features extracted by both networks. However, existing KDAD methods suffer…

计算机视觉与模式识别 · 计算机科学 2023-07-25 Peng Xing , Hao Tang , Jinhui Tang , Zechao Li

In recent years, deep face recognition methods have demonstrated impressive results on in-the-wild datasets. However, these methods have shown a significant decline in performance when applied to real-world low-resolution benchmarks like…

计算机视觉与模式识别 · 计算机科学 2023-08-21 Mohammad Saeed Ebrahimi Saadabadi , Sahar Rahimi Malakshan , Hossein Kashiani , Nasser M. Nasrabadi

Anomaly detection on the attributed network has recently received increasing attention in many research fields, such as cybernetic anomaly detection and financial fraud detection. With the wide application of deep learning on graph…

社会与信息网络 · 计算机科学 2022-09-13 Yuanjun Shi

Knowledge distillation aims to enhance the performance of a lightweight student model by exploiting the knowledge from a pre-trained cumbersome teacher model. However, in the traditional knowledge distillation, teacher predictions are only…

机器学习 · 计算机科学 2023-05-26 Shiya Luo , Defang Chen , Can Wang

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

Recent unsupervised anomaly detection methods often rely on feature extractors pretrained with auxiliary datasets or on well-crafted anomaly-simulated samples. However, this might limit their adaptability to an increasing set of anomaly…

计算机视觉与模式识别 · 计算机科学 2023-12-27 Songmin Dai , Yifan Wu , Xiaoqiang Li , Xiangyang Xue

Anomaly detection is critical for the secure and reliable operation of industrial control systems. As our reliance on such complex cyber-physical systems grows, it becomes paramount to have automated methods for detecting anomalies,…

机器学习 · 计算机科学 2024-05-10 Mayra Macas , Chunming Wu , Walter Fuertes

Semi-supervised learning is attracting blooming attention, due to its success in combining unlabeled data. However, pseudo-labeling-based semi-supervised approaches suffer from two problems in image classification: (1) Existing methods…

计算机视觉与模式识别 · 计算机科学 2024-07-08 Xuerong Zhang , Li Huang , Jing Lv , Ming Yang

Knowledge distillation, a widely used model compression technique, works on the basis of transferring knowledge from a cumbersome teacher model to a lightweight student model. The technique involves jointly optimizing the task specific and…

机器学习 · 计算机科学 2024-05-15 Shreyan Ganguly , Roshan Nayak , Rakshith Rao , Ujan Deb , Prathosh AP

Time series anomaly detection is critical for a wide range of applications. It aims to identify deviant samples from the normal sample distribution in time series. The most fundamental challenge for this task is to learn a representation…

机器学习 · 计算机科学 2023-10-12 Yiyuan Yang , Chaoli Zhang , Tian Zhou , Qingsong Wen , Liang Sun

Medical anomaly detection is a crucial yet challenging task aimed at recognizing abnormal images to assist in diagnosis. Due to the high-cost annotations of abnormal images, most methods utilize only known normal images during training and…

计算机视觉与模式识别 · 计算机科学 2023-03-21 Yu Cai , Hao Chen , Xin Yang , Yu Zhou , Kwang-Ting Cheng

Very low-resolution face recognition is challenging due to the serious loss of informative facial details in resolution degradation. In this paper, we propose a generative-discriminative representation distillation approach that combines…

计算机视觉与模式识别 · 计算机科学 2024-12-30 Junzheng Zhang , Weijia Guo , Bochao Liu , Ruixin Shi , Yong Li , Shiming Ge

In recent years, knowledge distillation methods based on contrastive learning have achieved promising results on image classification and object detection tasks. However, in this line of research, we note that less attention is paid to…

计算机视觉与模式识别 · 计算机科学 2023-12-08 Jiawei Fan , Chao Li , Xiaolong Liu , Meina Song , Anbang Yao

The goal of anomaly detection is to identify anomalous samples from normal ones. In this paper, a small number of anomalies are assumed to be available at the training stage, but they are assumed to be collected only from several anomaly…

机器学习 · 计算机科学 2022-05-03 Bowen Tian , Qinliang Su , Jian Yin

In the absence of sufficient data variation (e.g., scanner and protocol variability) in annotated data, deep neural networks (DNNs) tend to overfit during training. As a result, their performance is significantly lower on data from unseen…

Unsupervised out-of-distribution (OOD) Detection aims to separate the samples falling outside the distribution of training data without label information. Among numerous branches, contrastive learning has shown its excellent capability of…

计算机视觉与模式识别 · 计算机科学 2023-02-07 Menglong Chen , Xingtai Gui , Shicai Fan