Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Blood volume pulse"”.
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A Temporal Encoder-Decoder Approach to Extracting Blood Volume Pulse Signal Morphology from Face Videos
This thesis considers methods for extracting blood volume pulse (BVP) representations from video of the human face. Whereas most previous systems have been concerned with estimating vital signs such as average heart rate, this thesis addresses the more difficult problem of recovering BVP signal …
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Extraction of Blood Volume Pulse Morphology from Facial Videos Using an LSTM-Based Temporal Encoder-Decoder Model
This thesis introduces a method for extracting blood volume pulse (BVP) signals from facial videos, moving beyond basic heart rate estimation to capture full pulse waveforms. Our approach adapts techniques from audio signal separation and applies them to video, using a machine learning model …
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The influence of progressive relaxation on physiological arousal in a perceived risk situation
… skin conductance, electromyographic activity and blood volume pulse using a biofeedback system. The 11 member experimental group were introduced to a three day progressive relaxation training programme prior to participating in the stationary perceived risk activity. The experimental group …
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Motion artifact cancellation for wearable photoplethysmographic sensor
… the changes in reflected light due to the blood pulsing through under the skin. However, PPG signals are highly susceptible to motion artifacts, and in order for this technique to be useful for heart rate measurements around-the-clock, a motion artifact cancellation mechanism must be …
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Camera-based Recovery of Cardiovascular Signals from Unconstrained Face Videos Using an Attention Network
… the problem of recovering the morphology of blood volume pulse (BVP) information from a video of a person's face. Video-based remote plethysmography methods have shown promising results in estimating vital signs such as heart rate and breathing rate. However, recovering the instantaneous …
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The psychophysiology of risk processing and decision making at a regional stock exchange
… conductance/galvanic skin response (SCR/GSR), blood volume pulse (BVP), electrocardiogram (ECG), electroencephalogram (EEG), electromyogram (EMG), and temperature (Temp)-of monetarily motivated professionals making high pressure decisions. From these signals I estimate underlying physiological …
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Machine learning enhancements for wearable device investigation of acute anxiety and cardiovascular diseases
… modalities, such as electrocardiography (ECG), blood volume pulse (BVP), electrodermal activity (EDA) etc. signals, to improve early disease prediction and progression in physical and mental health disorders. We measure our ability to use these signals to classify anomalies in the cardiovascular …
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Cardiac Signals: Remote Measurement and Applications
… have developed a systematic algorithm to extract pulse rate from face video in diverse situations using video magnification. We have extracted signals from skin patches and then used frequency domain correlation to filter out non-cardiac signals. We have developed a novel entropy based method to …