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Real-world data often follows a long-tailed distribution, where a few head classes occupy most of the data and a large number of tail classes only contain very limited samples. In practice, deep models often show poor generalization…

计算机视觉与模式识别 · 计算机科学 2024-07-09 Haolin Pan , Yong Guo , Mianjie Yu , Jian Chen

Long-tailed relation classification is a challenging problem as the head classes may dominate the training phase, thereby leading to the deterioration of the tail performance. Existing solutions usually address this issue via…

机器学习 · 计算机科学 2023-01-26 Haiyang Yu , Ningyu Zhang , Shumin Deng , Zonggang Yuan , Yantao Jia , Huajun Chen

Despite recent advancements in out-of-distribution (OOD) detection, most current studies assume a class-balanced in-distribution training dataset, which is rarely the case in real-world scenarios. This paper addresses the challenging task…

机器学习 · 计算机科学 2023-12-15 Tong Wei , Bo-Lin Wang , Min-Ling Zhang

Long-Tailed distributions are pervasive in remote sensing due to the inherently imbalanced occurrence of grounded objects. However, a critical challenge remains largely overlooked, i.e., disentangling hard tail data samples from noisy…

计算机视觉与模式识别 · 计算机科学 2026-01-05 Chi Ding , Junxiao Xue , Xinyi Yin , Shi Chen , Yunyun Shi , Yiduo Wang , Fengjian Xue , Xuecheng Wu

Modern image classifiers perform well on populated classes, while degrading considerably on tail classes with only a few instances. Humans, by contrast, effortlessly handle the long-tailed recognition challenge, since they can learn the…

计算机视觉与模式识别 · 计算机科学 2025-06-17 Yingjun Du , Jiayi Shen , Xiantong Zhen , Cees G. M. Snoek

Deep anomaly detection (AD) aims to provide robust and efficient classifiers for one-class and unbalanced settings. However current AD models still struggle on edge-case normal samples and are often unable to keep high performance over…

计算机视觉与模式识别 · 计算机科学 2023-03-10 Loic Jezequel , Ngoc-Son Vu , Jean Beaudet , Aymeric Histace

Tabular anomaly detection under the one-class classification setting poses a significant challenge, as it involves accurately conceptualizing "normal" derived exclusively from a single category to discern anomalies from normal data…

机器学习 · 计算机科学 2024-12-18 Jianan Ye , Zhaorui Tan , Yijie Hu , Xi Yang , Guangliang Cheng , Kaizhu Huang

Machine learning offers potential solutions to current issues in industrial systems in areas such as quality control and predictive maintenance, but also faces unique barriers in industrial applications. An ongoing challenge is extreme…

机器学习 · 计算机科学 2026-01-15 Lesley Wheat , Martin v. Mohrenschildt , Saeid Habibi

Three-dimensional point cloud anomaly detection that aims to detect anomaly data points from a training set serves as the foundation for a variety of applications, including industrial inspection and autonomous driving. However, existing…

计算机视觉与模式识别 · 计算机科学 2024-03-05 Baozhu Zhao , Qiwei Xiong , Xiaohan Zhang , Jingfeng Guo , Qi Liu , Xiaofen Xing , Xiangmin Xu

Most of the existing methods for anomaly detection use only positive data to learn the data distribution, thus they usually need a pre-defined threshold at the detection stage to determine whether a test instance is an outlier.…

机器学习 · 计算机科学 2019-03-19 Kai Tian , Shuigeng Zhou , Jianping Fan , Jihong Guan

There is an inescapable long-tailed class-imbalance issue in many real-world classification problems. Current methods for addressing this problem only consider scenarios where all examples come from the same distribution. However, in many…

机器学习 · 计算机科学 2023-10-09 Xinyu Yang , Huaxiu Yao , Allan Zhou , Chelsea Finn

Temporal anomaly detection looks for irregularities over space-time. Unsupervised temporal models employed thus far typically work on sequences of feature vectors, and much less on temporal multiway data. We focus our investigation on…

机器学习 · 计算机科学 2020-09-22 Duc Nguyen , Phuoc Nguyen , Kien Do , Santu Rana , Sunil Gupta , Truyen Tran

Neural net classifiers trained on data with annotated class labels can also capture apparent visual similarity among categories without being directed to do so. We study whether this observation can be extended beyond the conventional…

计算机视觉与模式识别 · 计算机科学 2018-05-08 Zhirong Wu , Yuanjun Xiong , Stella Yu , Dahua Lin

Generalized Category Discovery (GCD) utilizes labeled samples of known classes to discover novel classes in unlabeled samples. Existing methods show effective performance on artificial datasets with balanced distributions. However,…

人工智能 · 计算机科学 2025-07-31 Cuong Manh Hoang

Real-world data often follow a long-tailed distribution with a high imbalance in the number of samples between classes. The problem with training from imbalanced data is that some background features, common to all classes, can be…

计算机视觉与模式识别 · 计算机科学 2024-06-05 Sanglee Park , Seung-won Hwang , Jungmin So

Real world data often have a long-tailed and open-ended distribution. A practical recognition system must classify among majority and minority classes, generalize from a few known instances, and acknowledge novelty upon a never seen…

计算机视觉与模式识别 · 计算机科学 2019-04-17 Ziwei Liu , Zhongqi Miao , Xiaohang Zhan , Jiayun Wang , Boqing Gong , Stella X. Yu

The problem of deep long-tailed learning, a prevalent challenge in the realm of generic visual recognition, persists in a multitude of real-world applications. To tackle the heavily-skewed dataset issue in long-tailed classification, prior…

计算机视觉与模式识别 · 计算机科学 2023-09-26 Wenxiang Xu , Yongcheng Jing , Linyun Zhou , Wenqi Huang , Lechao Cheng , Zunlei Feng , Mingli Song

Object frequency in the real world often follows a power law, leading to a mismatch between datasets with long-tailed class distributions seen by a machine learning model and our expectation of the model to perform well on all classes. We…

计算机视觉与模式识别 · 计算机科学 2020-03-25 Muhammad Abdullah Jamal , Matthew Brown , Ming-Hsuan Yang , Liqiang Wang , Boqing Gong

The distribution of data in the world (eg, internet, etc.) significantly differs from the well-curated datasets and is often over-populated with samples from common categories. The algorithms designed for well-curated datasets perform…

机器学习 · 计算机科学 2025-07-30 Harsh Rangwani

It is not uncommon that real-world data are distributed with a long tail. For such data, the learning of deep neural networks becomes challenging because it is hard to classify tail classes correctly. In the literature, several existing…

计算机视觉与模式识别 · 计算机科学 2024-07-19 Mengke Li , Yiu-ming Cheung , Yang Lu , Zhikai Hu , Weichao Lan , Hui Huang