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Self-supervised learning (SSL) methods have shown promise for medical imaging applications by learning meaningful visual representations, even when the amount of labeled data is limited. Here, we extend state-of-the-art contrastive learning…

Sleep is essential for maintaining human health and quality of life. Analyzing physiological signals during sleep is critical in assessing sleep quality and diagnosing sleep disorders. However, manual diagnoses by clinicians are…

Signal Processing · Electrical Eng. & Systems 2025-10-02 Cheol-Hui Lee , Hakseung Kim , Byung C. Yoon , Dong-Joo Kim

The 12-lead electrocardiogram (ECG) is a quasi-periodic, multi-channel signal with diagnostic content spanning timescales from millisecond waveform morphology to multi-second rhythm dynamics. Existing ECG representation learning relies on…

Computational Engineering, Finance, and Science · Computer Science 2026-05-26 Lei Xu , Fahad Sohrab , Mehmet Yamac , Merja Heinaniemi , Moncef Gabbouj

Monitoring physiological responses to hemodynamic stress can help in determining appropriate treatment and ensuring good patient outcomes. Physicians' intuition suggests that the human body has a number of physiological response patterns to…

Machine Learning · Computer Science 2019-11-14 Chufan Gao , Fabian Falck , Mononito Goswami , Anthony Wertz , Michael R. Pinsky , Artur Dubrawski

This study explores extended feature space that is indicative of blood pressure (BP) changes for better estimation of continuous BP in an unobtrusive way. A total of 222 features were extracted from noninvasively acquired electrocardiogram…

Signal Processing · Electrical Eng. & Systems 2019-08-28 Xiaorong Ding , Bryan P Yan , Yuan-Ting Zhang , Jing Liu , Peng Su , Ni Zhao

Photoplethysmography (PPG) sensor in wearable and clinical devices provides valuable physiological insights in a non-invasive and real-time fashion. Specialized Foundation Models (FM) or repurposed time-series FMs are used to benchmark…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Saurabh Kataria , Ayca Ermis , Lovely Yeswanth Panchumarthi , Minxiao Wang , Xiao Hu

While self-supervised learning (SSL) algorithms have been widely used to pre-train deep models, few efforts [11] have been done to improve representation learning of X-ray image analysis with SSL pre-trained models. In this work, we study a…

Computer Vision and Pattern Recognition · Computer Science 2023-10-04 Weibin Liao , Haoyi Xiong , Qingzhong Wang , Yan Mo , Xuhong Li , Yi Liu , Zeyu Chen , Siyu Huang , Dejing Dou

In practical scenarios involving the measurement of surface electromyography (sEMG) in muscles, particularly those areas near the heart, one of the primary sources of contamination is the presence of electrocardiogram (ECG) signals. To…

Signal Processing · Electrical Eng. & Systems 2024-06-14 Cho-Yuan Lee , Kuan-Chen Wang , Kai-Chun Liu , Yu-Te Wang , Xugang Lu , Ping-Cheng Yeh , Yu Tsao

Foundation models, especially those using transformers as backbones, have gained significant popularity, particularly in language and language-vision tasks. However, large foundation models are typically trained on high-quality data, which…

Signal Processing · Electrical Eng. & Systems 2024-04-30 Cheng Ding , Zhicheng Guo , Zhaoliang Chen , Randall J Lee , Cynthia Rudin , Xiao Hu

Speech discrete representation has proven effective in various downstream applications due to its superior compression rate of the waveform, fast convergence during training, and compatibility with other modalities. Discrete units extracted…

Sound · Computer Science 2024-06-17 Jiatong Shi , Xutai Ma , Hirofumi Inaguma , Anna Sun , Shinji Watanabe

We exploit a self-supervised deep multi-task learning framework for electrocardiogram (ECG) -based emotion recognition. The proposed solution consists of two stages of learning a) learning ECG representations and b) learning to classify…

Signal Processing · Electrical Eng. & Systems 2020-08-11 Pritam Sarkar , Ali Etemad

The coupling signal refers to a latent physiological signal that characterizes the transformation from cardiac electrical excitation, captured by the electrocardiogram (ECG), to mechanical contraction, recorded by the phonocardiogram (PCG).…

Signal Processing · Electrical Eng. & Systems 2025-11-05 Peihong Zhang , Zhixin Li , Rui Sang , Yuxuan Liu , Yiqiang Cai , Yizhou Tan , Shengchen Li

Deep learning methods exhibit promising performance for predictive modeling in healthcare, but two important challenges remain: -Data insufficiency:Often in healthcare predictive modeling, the sample size is insufficient for deep learning…

Machine Learning · Computer Science 2017-04-04 Edward Choi , Mohammad Taha Bahadori , Le Song , Walter F. Stewart , Jimeng Sun

In this paper, we propose a method that learns a general representation of periodic signals from unlabeled facial videos by capturing subtle changes in skin tone over time. The proposed framework employs the video masked autoencoder to…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Jiho Choi , Sang Jun Lee

Much of the information of breathing is contained within the photoplethysmography (PPG) signal, through changes in venous blood flow, heart rate and stroke volume. We aim to leverage this fact, by employing a novel deep learning framework…

Image and Video Processing · Electrical Eng. & Systems 2022-12-27 Harry J. Davies , Danilo P. Mandic

Existing approaches for predictive process monitoring are sub-symbolic, meaning that they learn correlations between descriptive features and a target feature fully based on data, e.g., predicting the surgical needs of a patient based on…

Artificial Intelligence · Computer Science 2026-04-01 Fabrizio De Santis , Gyunam Park , Wil M. P. van der Aalst , Francesco Zanichelli

Biomedical signals carry signature rhythms of complex physiological processes that control our daily bodily activity. The properties of these rhythms indicate the nature of interaction dynamics among physiological processes that maintain a…

Machine Learning · Computer Science 2020-12-14 Yassin Khalifa , Danilo Mandic , Ervin Sejdić

Depression recognition based on physiological signals such as functional near-infrared spectroscopy (fNIRS) and electroencephalogram (EEG) has made considerable progress. However, most existing studies ignore the complementarity and…

Machine Learning · Computer Science 2024-06-27 Kai Shao , Rui Wang , Yixue Hao , Long Hu , Min Chen , Hans Arno Jacobsen

Large-scale electrophysiological simulations to obtain electrocardiograms (ECG) carry the potential to produce extensive datasets for training of machine learning classifiers to, e.g., discriminate between different cardiac pathologies. The…

Signal Processing · Electrical Eng. & Systems 2021-09-15 Claudia Nagel , Steffen Schuler , Olaf Dössel , Axel Loewe

Biomedical signals aid in the diagnosis of different disorders and abnormalities. When targeting lossy compression of such signals, the medically relevant information that lies within the data should maintain its accuracy and thus its…

Information Theory · Computer Science 2024-10-30 Hoda Daou , Fabrice Labeau