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Weakly supervised point cloud semantic segmentation methods that require 1\% or fewer labels, hoping to realize almost the same performance as fully supervised approaches, which recently, have attracted extensive research attention. A…

计算机视觉与模式识别 · 计算机科学 2022-09-19 Tianfang Sun , Zhizhong Zhang , Xin Tan , Yanyun Qu , Yuan Xie , Lizhuang Ma

Unsupervised representation learning has been extensively employed in anomaly detection, achieving impressive performance. Extracting valuable feature vectors that can remarkably improve the performance of anomaly detection are essential in…

机器学习 · 计算机科学 2022-04-26 Muhao Xu , Xueying Zhou , Xizhan Gao , WeiKai He , Sijie Niu

Deep unsupervised representation learning has recently led to new approaches in the field of Unsupervised Anomaly Detection (UAD) in brain MRI. The main principle behind these works is to learn a model of normal anatomy by learning to…

图像与视频处理 · 电气工程与系统科学 2020-04-09 Christoph Baur , Stefan Denner , Benedikt Wiestler , Shadi Albarqouni , Nassir Navab

Denoising diffusion probabilistic models have recently received much research attention since they outperform alternative approaches, such as GANs, and currently provide state-of-the-art generative performance. The superior performance of…

计算机视觉与模式识别 · 计算机科学 2022-03-17 Dmitry Baranchuk , Ivan Rubachev , Andrey Voynov , Valentin Khrulkov , Artem Babenko

Lesion segmentation on nasal endoscopic images is challenging due to its complex lesion features. Fully-supervised deep learning methods achieve promising performance with pixel-level annotations but impose a significant annotation burden…

计算机视觉与模式识别 · 计算机科学 2026-02-11 Pengyu Jie , Wanquan Liu , Chenqiang Gao , Yihui Wen , Rui He , Weiping Wen , Pengcheng Li , Jintao Zhang , Deyu Meng

Known for their impressive performance in generative modeling, diffusion models are attractive candidates for density-based anomaly detection. This paper investigates different variations of diffusion modeling for unsupervised and…

机器学习 · 计算机科学 2026-05-11 Victor Livernoche , Vineet Jain , Yashar Hezaveh , Siamak Ravanbakhsh

Medical image segmentation is a challenging task, made more difficult by many datasets' limited size and annotations. Denoising diffusion probabilistic models (DDPM) have recently shown promise in modelling the distribution of natural…

计算机视觉与模式识别 · 计算机科学 2023-11-14 Margherita Rosnati , Melanie Roschewitz , Ben Glocker

The quality of patient care associated with diagnostic radiology is proportionate to a physician workload. Segmentation is a fundamental limiting precursor to both diagnostic and therapeutic procedures. Advances in machine learning (ML) aim…

图像与视频处理 · 电气工程与系统科学 2022-08-30 Ahmed Ghorbel , Ahmed Aldahdooh , Shadi Albarqouni , Wassim Hamidouche

Weakly-supervised learning has attracted growing research attention on medical lesions segmentation due to significant saving in pixel-level annotation cost. However, 1) most existing methods require effective prior and constraints to…

计算机视觉与模式识别 · 计算机科学 2020-12-09 Jiahua Dong , Yang Cong , Gan Sun , Yunsheng Yang , Xiaowei Xu , Zhengming Ding

Deep learning-based medical image segmentation helps assist diagnosis and accelerate the treatment process while the model training usually requires large-scale dense annotation datasets. Weakly semi-supervised medical image segmentation is…

计算机视觉与模式识别 · 计算机科学 2024-11-19 Shiman Li , Jiayue Zhao , Shaolei Liu , Xiaokun Dai , Chenxi Zhang , Zhijian Song

Unsupervised domain adaptation (UDA) is vital for alleviating the workload of labeling 3D point cloud data and mitigating the absence of labels when facing a newly defined domain. Various methods of utilizing images to enhance the…

计算机视觉与模式识别 · 计算机科学 2024-03-18 Jingyi Xu , Weidong Yang , Lingdong Kong , Youquan Liu , Rui Zhang , Qingyuan Zhou , Ben Fei

Digitization techniques for biomedical images yield different visual patterns in radiological exams. These differences may hamper the use of data-driven approaches for inference over these images, such as Deep Neural Networks. Another…

计算机视觉与模式识别 · 计算机科学 2019-12-10 Hugo Oliveira , Edemir Ferreira , Jefersson A. dos Santos

We propose adversarial constrained-CNN loss, a new paradigm of constrained-CNN loss methods, for weakly supervised medical image segmentation. In the new paradigm, prior knowledge is encoded and depicted by reference masks, and is further…

计算机视觉与模式识别 · 计算机科学 2020-05-04 Pengyi Zhang , Yunxin Zhong , Xiaoqiong Li

Semi-supervised medical image segmentation has gained growing interest due to its ability to utilize unannotated data. The current state-of-the-art methods mostly rely on pseudo-labeling within a co-training framework. These methods depend…

图像与视频处理 · 电气工程与系统科学 2024-05-14 Suruchi Kumari , Pravendra Singh

We present a weakly supervised deep learning method to perform instance segmentation of cells present in microscopy images. Annotation of biomedical images in the lab can be scarce, incomplete, and inaccurate. This is of concern when…

计算机视觉与模式识别 · 计算机科学 2019-08-28 Fidel A. Guerrero-Peña , Pedro D. Marrero Fernandez , Tsang Ing Ren , Alexandre Cunha

Accurate segmentation of brain vessels is crucial for cerebrovascular disease diagnosis and treatment. However, existing methods face challenges in capturing small vessels and handling datasets that are partially or ambiguously annotated.…

图像与视频处理 · 电气工程与系统科学 2023-08-08 Fengming Lin , Yan Xia , Nishant Ravikumar , Qiongyao Liu , Michael MacRaild , Alejandro F Frangi

Anomaly detection is an emerging approach in digital pathology for its ability to efficiently and effectively utilize data for disease diagnosis. While supervised learning approaches deliver high accuracy, they rely on extensively annotated…

图像与视频处理 · 电气工程与系统科学 2025-08-22 Jiamu Wang , Keunho Byeon , Jinsol Song , Anh Nguyen , Sangjeong Ahn , Sung Hak Lee , Jin Tae Kwak

Pixel-level annotation is expensive and time-consuming. Semi-supervised segmentation methods address this challenge by learning models on few labeled images alongside a large corpus of unlabeled images. Although foundation models could…

计算机视觉与模式识别 · 计算机科学 2025-07-15 Ivan Martinović , Josip Šarić , Marin Oršić , Matej Kristan , Siniša Šegvić

This review explores anomaly localization in medical images using denoising diffusion models. After providing a brief methodological background of these models, including their application to image reconstruction and their conditioning…

图像与视频处理 · 电气工程与系统科学 2025-12-15 Cosmin I. Bercea , Philippe C. Cattin , Julia A. Schnabel , Julia Wolleb

Anomaly inspection plays an important role in industrial manufacture. Existing anomaly inspection methods are limited in their performance due to insufficient anomaly data. Although anomaly generation methods have been proposed to augment…

计算机视觉与模式识别 · 计算机科学 2024-02-23 Teng Hu , Jiangning Zhang , Ran Yi , Yuzhen Du , Xu Chen , Liang Liu , Yabiao Wang , Chengjie Wang