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Autoencoder reconstructions are widely used for the task of unsupervised anomaly localization. Indeed, an autoencoder trained on normal data is expected to only be able to reconstruct normal features of the data, allowing the segmentation…

Computer Vision and Pattern Recognition · Computer Science 2020-02-11 David Dehaene , Oriel Frigo , Sébastien Combrexelle , Pierre Eline

Anomaly detection in surveillance videos is challenging and important for ensuring public security. Different from pixel-based anomaly detection methods, pose-based methods utilize highly-structured skeleton data, which decreases the…

Computer Vision and Pattern Recognition · Computer Science 2021-12-09 Shoubin Yu , Zhongyin Zhao , Haoshu Fang , Andong Deng , Haisheng Su , Dongliang Wang , Weihao Gan , Cewu Lu , Wei Wu

Semantic segmentation aims to predict pixel-level labels. It has become a popular task in various computer vision applications. While fully supervised segmentation methods have achieved high accuracy on large-scale vision datasets, they are…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Thanh-Dat Truong , Chi Nhan Duong , Ngan Le , Son Lam Phung , Chase Rainwater , Khoa Luu

We present a new method of training energy-based models (EBMs) for anomaly detection that leverages low-dimensional structures within data. The proposed algorithm, Manifold Projection-Diffusion Recovery (MPDR), first perturbs a data point…

Machine Learning · Computer Science 2023-10-31 Sangwoong Yoon , Young-Uk Jin , Yung-Kyun Noh , Frank C. Park

Semantic segmentation (SS) aims to classify each pixel into one of the pre-defined classes. This task plays an important role in self-driving cars and autonomous drones. In SS, many works have shown that most misclassified pixels are…

Computer Vision and Pattern Recognition · Computer Science 2023-05-29 Bike Chen , Wei Peng , Xiaofeng Cao , Juha Röning

Anomaly Detection is a relevant problem in numerous real-world applications, especially when dealing with images. However, little attention has been paid to the issue of changes over time in the input data distribution, which may cause a…

Computer Vision and Pattern Recognition · Computer Science 2024-03-26 Nikola Bugarin , Jovana Bugaric , Manuel Barusco , Davide Dalle Pezze , Gian Antonio Susto

Segment Anything Model (SAM) has made great progress in anomaly segmentation tasks due to its impressive generalization ability. However, existing methods that directly apply SAM through prompting often overlook the domain shift issue,…

Computer Vision and Pattern Recognition · Computer Science 2024-12-30 Hui-Yue Yang , Hui Chen , Ao Wang , Kai Chen , Zijia Lin , Yongliang Tang , Pengcheng Gao , Yuming Quan , Jungong Han , Guiguang Ding

This brief sketches initial progress towards a unified energy-based solution for the semi-supervised visual anomaly detection and localization problem. In this setup, we have access to only anomaly-free training data and want to detect and…

Machine Learning · Computer Science 2021-05-10 Ergin Utku Genc , Nilesh Ahuja , Ibrahima J Ndiour , Omesh Tickoo

Precise segmentation of out-of-distribution (OoD) objects, herein referred to as anomalies, is crucial for the reliable deployment of semantic segmentation models in open-set, safety-critical applications, such as autonomous driving.…

Computer Vision and Pattern Recognition · Computer Science 2025-04-29 Song Xia , Yi Yu , Henghui Ding , Wenhan Yang , Shifei Liu , Alex C. Kot , Xudong Jiang

Visual anomaly detection is commonly used in industrial quality inspection. In this paper, we present a new dataset as well as a new self-supervised learning method for ImageNet pre-training to improve anomaly detection and segmentation in…

Computer Vision and Pattern Recognition · Computer Science 2022-08-01 Yang Zou , Jongheon Jeong , Latha Pemula , Dongqing Zhang , Onkar Dabeer

Reconstruction-based methods play an important role in unsupervised anomaly detection in images. Ideally, we expect a perfect reconstruction for normal samples and poor reconstruction for abnormal samples. Since the generalizability of deep…

Computer Vision and Pattern Recognition · Computer Science 2021-07-29 Jinlei Hou , Yingying Zhang , Qiaoyong Zhong , Di Xie , Shiliang Pu , Hong Zhou

Acquiring the most representative examples via active learning (AL) can benefit many data-dependent computer vision tasks by minimizing efforts of image-level or pixel-wise annotations. In this paper, we propose a novel Collaborative…

Computer Vision and Pattern Recognition · Computer Science 2022-01-12 Yu Qiao , Jincheng Zhu , Chengjiang Long , Zeyao Zhang , Yuxin Wang , Zhenjun Du , Xin Yang

Semantic segmentation models classify pixels into a set of known (``in-distribution'') visual classes. When deployed in an open world, the reliability of these models depends on their ability not only to classify in-distribution pixels but…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Yuyuan Liu , Choubo Ding , Yu Tian , Guansong Pang , Vasileios Belagiannis , Ian Reid , Gustavo Carneiro

End-to-end autonomous driving provides a feasible way to automatically maximize overall driving system performance by directly mapping the raw pixels from a front-facing camera to control signals. Recent advanced methods construct a latent…

Machine Learning · Computer Science 2024-05-21 Zeyu Gao , Yao Mu , Chen Chen , Jingliang Duan , Shengbo Eben Li , Ping Luo , Yanfeng Lu

Most state-of-the-art approaches to road extraction from aerial images rely on a CNN trained to label road pixels as foreground and remainder of the image as background. The CNN is usually trained by minimizing pixel-wise losses, which is…

Computer Vision and Pattern Recognition · Computer Science 2020-07-20 Subeesh Vasu , Mateusz Kozinski , Leonardo Citraro , Pascal Fua

Recently supervised learning rapidly develops in scene text segmentation. However, the lack of high-quality datasets and the high cost of pixel annotation greatly limit the development of them. Considering the well-performed few-shot…

Computer Vision and Pattern Recognition · Computer Science 2025-04-16 Chenming Li , Chengxu Liu , Yuanting Fan , Xiao Jin , Xingsong Hou , Xueming Qian

The objective of Active Learning is to strategically label a subset of the dataset to maximize performance within a predetermined labeling budget. In this study, we harness features acquired through self-supervised learning. We introduce a…

Machine Learning · Computer Science 2023-12-27 Jingyao Li , Pengguang Chen , Shaozuo Yu , Shu Liu , Jiaya Jia

Active learning is considered a viable solution to alleviate the contradiction between the high dependency of deep learning-based segmentation methods on annotated data and the expensive pixel-level annotation cost of medical images.…

Computer Vision and Pattern Recognition · Computer Science 2024-10-23 Jun Shi , Shulan Ruan , Ziqi Zhu , Minfan Zhao , Hong An , Xudong Xue , Bing Yan

Fine-grained image classification has witnessed significant advancements with the advent of deep learning and computer vision technologies. However, the scarcity of detailed annotations remains a major challenge, especially in scenarios…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Bowen Tian , Songning Lai , Lujundong Li , Zhihao Shuai , Runwei Guan , Tian Wu , Yutao Yue

The detection of out of distribution samples for image classification has been widely researched. Safety critical applications, such as autonomous driving, would benefit from the ability to localise the unusual objects causing the image to…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Matt Angus , Krzysztof Czarnecki , Rick Salay