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Unsupervised representation learning algorithms such as word2vec and ELMo improve the accuracy of many supervised NLP models, mainly because they can take advantage of large amounts of unlabeled text. However, the supervised models only…

Computation and Language · Computer Science 2018-09-25 Kevin Clark , Minh-Thang Luong , Christopher D. Manning , Quoc V. Le

Common cross-validation (CV) methods like k-fold cross-validation or Monte-Carlo cross-validation estimate the predictive performance of a learner by repeatedly training it on a large portion of the given data and testing on the remaining…

Machine Learning · Computer Science 2021-11-30 Felix Mohr , Jan N. van Rijn

Multi-lead electrocardiogram (ECG) provides clinical information of heartbeats from several fixed viewpoints determined by the lead positioning. However, it is often not satisfactory to visualize ECG signals in these fixed and limited…

Signal Processing · Electrical Eng. & Systems 2022-04-05 Jintai Chen , Xiangshang Zheng , Hongyun Yu , Danny Z. Chen , Jian Wu

Temporal segmentation of long videos is an important problem, that has largely been tackled through supervised learning, often requiring large amounts of annotated training data. In this paper, we tackle the problem of self-supervised…

Computer Vision and Pattern Recognition · Computer Science 2019-04-09 Sathyanarayanan N. Aakur , Sudeep Sarkar

Cardiac disease evaluation depends on multiple diagnostic modalities: electrocardiogram (ECG) to diagnose abnormal heart rhythms, and imaging modalities such as Magnetic Resonance Imaging (MRI), Computed Tomography (CT) and echocardiography…

Signal Processing · Electrical Eng. & Systems 2024-12-25 Evariste Njomgue Fotso , Buntheng Ly , Hubert Cochet , Maxime Sermesant

Cardiac valve event timing plays a crucial role when conducting clinical measurements using echocardiography. However, established automated approaches are limited by the need of external electrocardiogram sensors, and manual measurements…

Self-supervised learning (SSL) methods are popular since they can address situations with limited annotated data by directly utilising the underlying data distribution. However, the adoption of such methods is not explored enough in…

Image and Video Processing · Electrical Eng. & Systems 2024-08-01 Joseph Geo Benjamin , Mothilal Asokan , Amna Alhosani , Hussain Alasmawi , Werner Gerhard Diehl , Leanne Bricker , Karthik Nandakumar , Mohammad Yaqub

Cell event detection in cell videos is essential for monitoring of cellular behavior over extended time periods. Deep learning methods have shown great success in the detection of cell events for their ability to capture more discriminative…

Computer Vision and Pattern Recognition · Computer Science 2019-09-24 Ha Tran Hong Phan , Ashnil Kumar , David Feng , Michael Fulham , Jinman Kim

Objectives: Lung cancer poses a significant global health challenge, necessitating improved prognostic methods for personalized treatment. This study introduces a censor-aware semi-supervised learning (SSL) framework that integrates…

Medical Physics · Physics 2025-06-16 Arman Gorji , Ali Fathi Jouzdani , Nima Sanati , Ren Yuan , Arman Rahmim , Mohammad R. Salmanpour

Investigation on the electrocardiogram (ECG) signals is an essential way to diagnose heart disease since the ECG process is noninvasive and easy to use. This work presents a supraventricular arrhythmia prediction model consisting of a few…

Signal Processing · Electrical Eng. & Systems 2021-12-28 Pampa Howladar , Manodipan Sahoo

Interpretation of electrocardiography (ECG) signals is required for diagnosing cardiac arrhythmia. Recently, machine learning techniques have been applied for automated computer-aided diagnosis. Machine learning tasks can be divided into…

Reliable interpretation of cardiac ultrasound images is essential for accurate clinical diagnosis and assessment. Self-supervised learning has shown promise in medical imaging by leveraging large unlabelled datasets to learn meaningful…

Image and Video Processing · Electrical Eng. & Systems 2026-02-18 Youssef Megahed , Salma I. Megahed , Robin Ducharme , Inok Lee , Adrian D. C. Chan , Mark C. Walker , Steven Hawken

Our study concerns with automated predicting of congestive heart failure (CHF) through the analysis of electrocardiography (ECG) signals. A novel machine learning approach, regularized hessenberg decomposition based extreme learning machine…

Machine Learning · Computer Science 2019-07-16 Apdullah Yayık , Yakup Kutlu , Gökhan Altan

In this work, we implement a fully convolutional segmenter featuring both a learned group structure and a regularized weight-pruner to reduce the high computational cost in volumetric image segmentation. We validated our framework on the…

Image and Video Processing · Electrical Eng. & Systems 2020-04-24 S. M. Kamrul Hasan , Cristian A. Linte

Objective: This work evaluates a new approach for calculating the left-ventricular (LV) early filling propagation velocity (VP) from color M-Mode (CMM) echocardiograms using wavelet analysis. Unlike current approaches, the method requires…

Medical Physics · Physics 2019-10-29 Sreyashi Chakraborty , Hiroyuki Iwano , Michael E. Hall , Pavlos P. Vlachos

Assessment of cardiovascular disease (CVD) with cine magnetic resonance imaging (MRI) has been used to non-invasively evaluate detailed cardiac structure and function. Accurate segmentation of cardiac structures from cine MRI is a crucial…

Image and Video Processing · Electrical Eng. & Systems 2021-07-23 Xiaofeng Liu , Fangxu Xing , Hanna K. Gaggin , Weichung Wang , C. -C. Jay Kuo , Georges El Fakhri , Jonghye Woo

In the recent years, convolutional neural networks have transformed the field of medical image analysis due to their capacity to learn discriminative image features for a variety of classification and regression tasks. However, successfully…

Computer Vision and Pattern Recognition · Computer Science 2019-07-08 Wenjia Bai , Chen Chen , Giacomo Tarroni , Jinming Duan , Florian Guitton , Steffen E. Petersen , Yike Guo , Paul M. Matthews , Daniel Rueckert

Long video understanding remains challenging due to its complex, diverse, and temporally scattered content. Although video large language models (Video-LLMs) can process videos lasting tens of minutes, applying them to truly long sequences…

Computer Vision and Pattern Recognition · Computer Science 2025-10-24 Yuan Sheng , Yanbin Hao , Chenxu Li , Shuo Wang , Xiangnan He

Echocardiography (echo) is the first imaging modality used when assessing cardiac function. The measurement of functional biomarkers from echo relies upon the segmentation of cardiac structures and deep learning models have been proposed to…

Computer Vision and Pattern Recognition · Computer Science 2026-04-15 Iman Islam , Esther Puyol-Antón , Bram Ruijsink , Andrew J. Reader , Andrew P. King

Linear measurements of the left ventricle (LV) in the Parasternal Long Axis (PLAX) view using B-mode echocardiography are crucial for cardiac assessment. These involve placing 4-6 landmarks along a virtual scanline (SL) perpendicular to the…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Durgesh K. Singh , Ahcene Boubekki , Qing Cao , Svein Arne Aase , Robert Jenssen , Michael Kampffmeyer
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