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With the COVID-19 global pandemic, computer-assisted diagnoses of medical images have gained much attention, and robust methods of Semantic Segmentation of Computed Tomography (CT) became highly desirable. Semantic Segmentation of CT is one…

Computer Vision and Pattern Recognition · Computer Science 2022-05-20 Bruno A. Krinski , Daniel V. Ruiz , Eduardo Todt

In recent years self-supervised learning has emerged as a promising candidate for unsupervised representation learning. In the visual domain its applications are mostly studied in the context of images of natural scenes. However, its…

Computer Vision and Pattern Recognition · Computer Science 2021-06-04 Vladan Stojnić , Vladimir Risojević

Problem: Detecting COVID-19 from chest X-Ray (CXR) images has become one of the fastest and easiest methods for detecting COVID-19. However, the existing methods usually use supervised transfer learning from natural images as a pretraining…

Image and Video Processing · Electrical Eng. & Systems 2023-03-31 Guang Li , Ren Togo , Takahiro Ogawa , Miki Haseyama

Purpose: Considering several patients screened due to COVID-19 pandemic, computer-aided detection has strong potential in assisting clinical workflow efficiency and reducing the incidence of infections among radiologists and healthcare…

Image and Video Processing · Electrical Eng. & Systems 2022-12-20 Guang Li , Ren Togo , Takahiro Ogawa , Miki Haseyama

We investigate the utility of pretraining by contrastive self supervised learning on both natural-scene and medical imaging datasets when the unlabeled dataset size is small, or when the diversity within the unlabeled set does not lead to…

Image and Video Processing · Electrical Eng. & Systems 2021-09-07 Ozan Ciga , Tony Xu , Anne L. Martel

The current COVID-19 pandemic overloads healthcare systems, including radiology departments. Though several deep learning approaches were developed to assist in CT analysis, nobody considered study triage directly as a computer science…

Self-supervised learning aims to learn representations from the data itself without explicit manual supervision. Existing efforts ignore a crucial aspect of self-supervised learning - the ability to scale to large amount of data because…

Computer Vision and Pattern Recognition · Computer Science 2019-06-07 Priya Goyal , Dhruv Mahajan , Abhinav Gupta , Ishan Misra

In the realms of computer vision, it is evident that deep neural networks perform better in a supervised setting with a large amount of labeled data. The representations learned with supervision are not only of high quality but also helps…

Machine Learning · Computer Science 2020-09-28 Souradip Chakraborty , Aritra Roy Gosthipaty , Sayak Paul

Purpose: Accurate segmentation of lung and infection in COVID-19 CT scans plays an important role in the quantitative management of patients. Most of the existing studies are based on large and private annotated datasets that are…

Image and Video Processing · Electrical Eng. & Systems 2021-06-09 Jun Ma , Yixin Wang , Xingle An , Cheng Ge , Ziqi Yu , Jianan Chen , Qiongjie Zhu , Guoqiang Dong , Jian He , Zhiqiang He , Yuntao Zhu , Ziwei Nie , Xiaoping Yang

In many critical computer vision scenarios unlabeled data is plentiful, but labels are scarce and difficult to obtain. As a result, semi-supervised learning which leverages unlabeled data to boost the performance of supervised classifiers…

Computer Vision and Pattern Recognition · Computer Science 2025-05-29 Jay C. Rothenberger , Dimitrios I. Diochnos

Self-supervised pretraining followed by supervised fine-tuning has seen success in image recognition, especially when labeled examples are scarce, but has received limited attention in medical image analysis. This paper studies the…

Person re-identification is the challenging task of identifying a person across different camera views. Training a convolutional neural network (CNN) for this task requires annotating a large dataset, and hence, it involves the…

Computer Vision and Pattern Recognition · Computer Science 2021-07-27 Olga Moskvyak , Frederic Maire , Feras Dayoub , Mahsa Baktashmotlagh

Semi-supervised learning (SSL) leverages both labeled and unlabeled data for training models when the labeled data is limited and the unlabeled data is vast. Frequently, the unlabeled data is more widely available than the labeled data,…

Image and Video Processing · Electrical Eng. & Systems 2022-11-07 Isaac Benavides-Mata , Saul Calderon-Ramirez

Chest radiography is a relatively cheap, widely available medical procedure that conveys key information for making diagnostic decisions. Chest X-rays are almost always used in the diagnosis of respiratory diseases such as pneumonia or the…

Image and Video Processing · Electrical Eng. & Systems 2021-11-05 Matej Gazda , Jakub Gazda , Jan Plavka , Peter Drotar

We investigate the utility of in-domain self-supervised pre-training of vision models in the analysis of remote sensing imagery. Self-supervised learning (SSL) has emerged as a promising approach for remote sensing image classification due…

Computer Vision and Pattern Recognition · Computer Science 2024-02-06 Ivica Dimitrovski , Ivan Kitanovski , Nikola Simidjievski , Dragi Kocev

The coronavirus pandemic has been going on since the year 2019, and the trend is still not abating. Therefore, it is particularly important to classify medical CT scans to assist in medical diagnosis. At present, Supervised Deep Learning…

Image and Video Processing · Electrical Eng. & Systems 2022-10-12 Jiashu Xu , Sergii Stirenko

One of the largest problems in medical image processing is the lack of annotated data. Labeling medical images often requires highly trained experts and can be a time-consuming process. In this paper, we evaluate a method of reducing the…

Computer Vision and Pattern Recognition · Computer Science 2022-06-02 Marin Benčević , Marija Habijan , Irena Galić , Aleksandra Pizurica

Computed tomography (CT) and chest X-ray (CXR) have been the two dominant imaging modalities deployed for improved management of Coronavirus disease 2019 (COVID-19). Due to faster imaging, less radiation exposure, and being cost-effective…

Image and Video Processing · Electrical Eng. & Systems 2021-12-21 Xiao Qi , John L. Nosher , David J. Foran , Ilker Hacihaliloglu

The success of deep learning methods in medical image segmentation tasks heavily depends on a large amount of labeled data to supervise the training. On the other hand, the annotation of biomedical images requires domain knowledge and can…

Computer Vision and Pattern Recognition · Computer Science 2021-09-30 Xinrong Hu , Dewen Zeng , Xiaowei Xu , Yiyu Shi

Recently, contrastive learning has largely advanced the progress of unsupervised visual representation learning. Pre-trained on ImageNet, some self-supervised algorithms reported higher transfer learning performance compared to…

Computer Vision and Pattern Recognition · Computer Science 2020-11-18 Longhui Wei , Lingxi Xie , Jianzhong He , Jianlong Chang , Xiaopeng Zhang , Wengang Zhou , Houqiang Li , Qi Tian