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Medical anomaly detection aims to identify abnormal findings using only normal training data, playing a crucial role in health screening and recognizing rare diseases. Reconstruction-based methods, particularly those utilizing autoencoders…

机器学习 · 计算机科学 2024-07-10 Yu Cai , Hao Chen , Kwang-Ting Cheng

Recently, anomaly detection and localization in multimedia data have received significant attention among the machine learning community. In real-world applications such as medical diagnosis and industrial defect detection, anomalies only…

计算机视觉与模式识别 · 计算机科学 2022-05-16 Chaoqin Huang , Qinwei Xu , Yanfeng Wang , Yu Wang , Ya Zhang

Recent advances in deep learning-based medical image segmentation studies achieve nearly human-level performance in fully supervised manner. However, acquiring pixel-level expert annotations is extremely expensive and laborious in medical…

计算机视觉与模式识别 · 计算机科学 2023-05-19 Hyungseob Shin , Hyeongyu Kim , Sewon Kim , Yohan Jun , Taejoon Eo , Dosik Hwang

Unsupervised anomaly detection (UAD) has been widely implemented in industrial and medical applications, which reduces the cost of manual annotation and improves efficiency in disease diagnosis. Recently, deep auto-encoder with its variants…

计算机视觉与模式识别 · 计算机科学 2023-03-31 Mingqing Wang , Jiawei Li , Zhenyang Li , Chengxiao Luo , Bin Chen , Shu-Tao Xia , Zhi Wang

Anomaly detection for Magnetic Resonance Images (MRIs) can be solved with unsupervised methods by learning the distribution of healthy images and identifying anomalies as outliers. In presence of an additional dataset of unlabelled data…

机器学习 · 计算机科学 2020-07-27 Alexandra-Ioana Albu , Alina Enescu , Luigi Malagò

Medical image segmentation is a fundamental task in medical image analysis. Despite that deep convolutional neural networks have gained stellar performance in this challenging task, they typically rely on large labeled datasets, which have…

计算机视觉与模式识别 · 计算机科学 2019-12-06 Qikui Zhu , Bo Du , Pingkun Yan

Unsupervised anomaly detection aims to detect defective parts of a sample by having access, during training, to a set of normal, i.e. defect-free, data. It has many applications in fields, such as industrial inspection or medical imaging,…

图像与视频处理 · 电气工程与系统科学 2025-09-03 Robin Trombetta , Carole Lartizien

Unsupervised semantic segmentation (USS) aims to achieve high-quality segmentation without manual pixel-level annotations. Existing USS models provide coarse category classification for regions, but the results often have blurry and…

多媒体 · 计算机科学 2024-05-21 Tingting Li , Gensheng Pei , Xinhao Cai , Huafeng Liu , Qiong Wang , Yazhou Yao

Unsupervised image segmentation aims at assigning the pixels with similar feature into a same cluster without annotation, which is an important task in computer vision. Due to lack of prior knowledge, most of existing model usually need to…

计算机视觉与模式识别 · 计算机科学 2020-12-17 Zhichao Wu , Lei Guo , Hao Zhang , Dan Xu

Anomaly detection in Minimally-Invasive Surgery (MIS) traditionally requires a human expert monitoring the procedure from a console. Data scarcity, on the other hand, hinders what would be a desirable migration towards autonomous…

机器人学 · 计算机科学 2021-04-23 Dinesh Jackson Samuel , Fabio Cuzzolin

We introduce a neural network framework, utilizing adversarial learning to partition an image into two cuts, with one cut falling into a reference distribution provided by the user. This concept tackles the task of unsupervised anomaly…

计算机视觉与模式识别 · 计算机科学 2021-10-04 Raunak Dey , Yi Hong

This paper investigates an extremely challenging problem: barely-supervised volumetric medical image segmentation (BSS). A BSS training dataset consists of two parts: 1) a barely-annotated labeled set, where each labeled image contains only…

计算机视觉与模式识别 · 计算机科学 2024-09-05 Zhiqiang Shen , Peng Cao , Junming Su , Jinzhu Yang , Osmar R. Zaiane

The core challenge in unsupervised anomaly detection is identifying abnormal patterns without prior knowledge of their characteristics. While existing methods have addressed aspects of this problem, they often struggle to learn a robust…

机器学习 · 计算机科学 2026-05-12 Prithul Sarker , Sushmita Sarker , Nicholas G. Murray , Alireza Tavakkoli

Deep unsupervised approaches are gathering increased attention for applications such as pathology detection and segmentation in medical images since they promise to alleviate the need for large labeled datasets and are more generalizable…

计算机视觉与模式识别 · 计算机科学 2023-08-01 Ioannis Lagogiannis , Felix Meissen , Georgios Kaissis , Daniel Rueckert

Existing displacement strategies in semi-supervised segmentation only operate on rectangular regions, ignoring anatomical structures and resulting in boundary distortions and semantic inconsistency. To address these issues, we propose UCAD,…

计算机视觉与模式识别 · 计算机科学 2026-01-27 Chengbo Ding , Fenghe Tang , Shaohua Kevin Zhou

A single unexpected object on the road can cause an accident or may lead to injuries. To prevent this, we need a reliable mechanism for finding anomalous objects on the road. This task, called anomaly segmentation, can be a stepping stone…

计算机视觉与模式识别 · 计算机科学 2023-08-07 Alexey Nekrasov , Alexander Hermans , Lars Kuhnert , Bastian Leibe

The Segment Anything Model (SAM) exhibits a capability to segment a wide array of objects in natural images, serving as a versatile perceptual tool for various downstream image segmentation tasks. In contrast, medical image segmentation…

计算机视觉与模式识别 · 计算机科学 2023-08-29 Yizhe Zhang , Tao Zhou , Shuo Wang , Ye Wu , Pengfei Gu , Danny Z. Chen

This paper presents a simple yet effective two-stage framework for semi-supervised medical image segmentation. Unlike prior state-of-the-art semi-supervised segmentation methods that predominantly rely on pseudo supervision directly on…

计算机视觉与模式识别 · 计算机科学 2023-08-01 Huimin Wu , Xiaomeng Li , Kwang-Ting Cheng

Ultrasound is the second most used modality in medical imaging. It is cost effective, hazardless, portable and implemented routinely in numerous clinical procedures. Nonetheless, image quality is characterized by granulated appearance, poor…

图像与视频处理 · 电气工程与系统科学 2022-06-13 Lilach Barkat , Moti Freiman , Haim Azhari

It has recently been shown that deep learning models for anatomical segmentation in medical images can exhibit biases against certain sub-populations defined in terms of protected attributes like sex or ethnicity. In this context, auditing…

计算机视觉与模式识别 · 计算机科学 2023-09-04 Nicolás Gaggion , Rodrigo Echeveste , Lucas Mansilla , Diego H. Milone , Enzo Ferrante