');mask-image:url('data:image/svg+xml;utf8,');mask-mode:alpha;-webkit-mask-position:center;mask-position:center;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-size:contain;mask-size:contain}}:root :where(.wp-block-image.is-style-rounded img,.wp-block-image .is-style-rounded img){border-radius:9999px}.wp-block-image figure{margin:0}.wp-lightbox-container{display:flex;flex-direction:column;position:relative}.wp-lightbox-container img{cursor:zoom-in}.wp-lightbox-container img:hover+button{opacity:1}.wp-lightbox-container button{align-items:center;backdrop-filter:blur(16px) saturate(180%);background-color:#5a5a5a40;border:none;border-radius:4px;cursor:zoom-in;display:flex;height:20px;justify-content:center;opacity:0;padding:0;position:absolute;right:16px;text-align:center;top:16px;width:20px;z-index:100}@media not (prefers-reduced-motion){.wp-lightbox-container button{transition:opacity .2s ease}}.wp-lightbox-container button:focus-visible{outline:3px auto #5a5a5a40;outline:3px auto -webkit-focus-ring-color;outline-offset:3px}.wp-lightbox-container button:hover{cursor:pointer;opacity:1}.wp-lightbox-container button:focus{opacity:1}.wp-lightbox-container button:focus,.wp-lightbox-container button:hover,.wp-lightbox-container button:not(:hover):not(:active):not(.has-background){background-color:#5a5a5a40;border:none}.wp-lightbox-overlay{box-sizing:border-box;cursor:zoom-out;height:100vh;left:0;overflow:hidden;position:fixed;top:0;visibility:hidden;width:100%;z-index:100000}.wp-lightbox-overlay .wp-lightbox-close-button{align-items:center;cursor:pointer;display:flex;font-family:inherit;gap:8px;justify-content:center;line-height:1;min-height:40px;min-width:40px;padding:0 4px;position:absolute;right:calc(env(safe-area-inset-right) + 16px);top:calc(env(safe-area-inset-top) + 16px);z-index:5000000}.wp-lightbox-overlay .wp-lightbox-close-button:focus,.wp-lightbox-overlay .wp-lightbox-close-button:hover,.wp-lightbox-overlay .wp-lightbox-close-button:not(:hover):not(:active):not(.has-background){background:none;border:none}.wp-lightbox-overlay .wp-lightbox-close-button:has(.wp-lightbox-close-text:not([hidden])) .wp-lightbox-close-icon svg{height:1em;width:1em}.wp-lightbox-overlay .wp-lightbox-close-icon svg{display:block}.wp-lightbox-overlay .wp-lightbox-navigation-button-next,.wp-lightbox-overlay .wp-lightbox-navigation-button-prev{align-items:center;bottom:16px;cursor:pointer;display:flex;font-family:inherit;gap:4px;justify-content:center;line-height:1;min-height:40px;min-width:40px;padding:0 8px;position:absolute;z-index:2000002}.wp-lightbox-overlay .wp-lightbox-navigation-button-next[hidden],.wp-lightbox-overlay .wp-lightbox-navigation-button-prev[hidden]{display:none}@media (min-width:960px){.wp-lightbox-overlay .wp-lightbox-navigation-button-next,.wp-lightbox-overlay .wp-lightbox-navigation-button-prev{bottom:50%;transform:translateY(-50%)}}.wp-lightbox-overlay .wp-lightbox-navigation-button-next:focus,.wp-lightbox-overlay .wp-lightbox-navigation-button-next:hover,.wp-lightbox-overlay .wp-lightbox-navigation-button-next:not(:hover):not(:active):not(.has-background),.wp-lightbox-overlay .wp-lightbox-navigation-button-prev:focus,.wp-lightbox-overlay .wp-lightbox-navigation-button-prev:hover,.wp-lightbox-overlay .wp-lightbox-navigation-button-prev:not(:hover):not(:active):not(.has-background){background:none;border:none;padding:0 8px}.wp-lightbox-overlay .wp-lightbox-navigation-button-next:has(.wp-lightbox-navigation-text:not([hidden])) .wp-lightbox-navigation-icon svg,.wp-lightbox-overlay .wp-lightbox-navigation-button-prev:has(.wp-lightbox-navigation-text:not([hidden])) .wp-lightbox-navigation-icon svg{display:block;height:1.5em;width:1.5em}.wp-lightbox-overlay .wp-lightbox-navigation-button-prev{left:calc(env(safe-area-inset-left) + 16px)}.wp-lightbox-overlay .wp-lightbox-navigation-button-next{right:calc(env(safe-area-inset-right) + 16px)}.wp-lightbox-overlay .wp-lightbox-navigation-icon svg{vertical-align:middle}.wp-lightbox-overlay .lightbox-image-container{height:var(--wp--lightbox-container-height);left:50%;overflow:hidden;position:absolute;top:50%;transform:translate(-50%,-50%);transform-origin:top left;width:var(--wp--lightbox-container-width);z-index:2000001}.wp-lightbox-overlay .wp-block-image{align-items:center;box-sizing:border-box;display:flex;height:100%;justify-content:center;margin:0;position:relative;transform-origin:0 0;width:100%;z-index:3000000}.wp-lightbox-overlay .wp-block-image img{height:var(--wp--lightbox-image-height);min-height:var(--wp--lightbox-image-height);min-width:var(--wp--lightbox-image-width);width:var(--wp--lightbox-image-width)}.wp-lightbox-overlay .wp-block-image figcaption{display:none}.wp-lightbox-overlay button{background:none;border:none}.wp-lightbox-overlay .scrim{background-color:#fff;height:100%;opacity:.9;position:absolute;width:100%;z-index:2000000}.wp-lightbox-overlay.active{visibility:visible}@media not (prefers-reduced-motion){.wp-lightbox-overlay.active{animation:turn-on-visibility .25s both}.wp-lightbox-overlay.active img{animation:turn-on-visibility .35s both}.wp-lightbox-overlay.show-closing-animation:not(.active){animation:turn-off-visibility .35s both}.wp-lightbox-overlay.show-closing-animation:not(.active) img{animation:turn-off-visibility .25s both}.wp-lightbox-overlay.zoom.active{animation:none;opacity:1;visibility:visible}.wp-lightbox-overlay.zoom.active .lightbox-image-container{animation:lightbox-zoom-in .4s}.wp-lightbox-overlay.zoom.active .lightbox-image-container img{animation:none}.wp-lightbox-overlay.zoom.active .scrim{animation:turn-on-visibility .4s forwards}.wp-lightbox-overlay.zoom.show-closing-animation:not(.active){animation:none}.wp-lightbox-overlay.zoom.show-closing-animation:not(.active) .lightbox-image-container{animation:lightbox-zoom-out .4s}.wp-lightbox-overlay.zoom.show-closing-animation:not(.active) .lightbox-image-container img{animation:none}.wp-lightbox-overlay.zoom.show-closing-animation:not(.active) .scrim{animation:turn-off-visibility .4s forwards}}@keyframes show-content-image{0%{visibility:hidden}99%{visibility:hidden}to{visibility:visible}}@keyframes turn-on-visibility{0%{opacity:0}to{opacity:1}}@keyframes turn-off-visibility{0%{opacity:1;visibility:visible}99%{opacity:0;visibility:visible}to{opacity:0;visibility:hidden}}@keyframes lightbox-zoom-in{0%{transform:translate(calc((-100vw + var(--wp--lightbox-scrollbar-width))/2 + var(--wp--lightbox-initial-left-position)),calc(-50vh + var(--wp--lightbox-initial-top-position))) scale(var(--wp--lightbox-scale))}to{transform:translate(-50%,-50%) scale(1)}}@keyframes lightbox-zoom-out{0%{transform:translate(-50%,-50%) scale(1);visibility:visible}99%{visibility:visible}to{transform:translate(calc((-100vw + var(--wp--lightbox-scrollbar-width))/2 + var(--wp--lightbox-initial-left-position)),calc(-50vh + var(--wp--lightbox-initial-top-position))) scale(var(--wp--lightbox-scale));visibility:hidden}} /*# sourceURL=/sam3/wp-includes/blocks/image/style.min.css */

杏吧原创

Skip to Content

Expertise: Video Magnification

AgeWell logo

SAM3 Expertise Areas: Video Magnification

Video Magnification is a technique to identify small changes in video that are invisible to the naked eye but can be identified with advanced signal processing. This technique can provide a method for the assessment of well-being and specifically remote assessment of vitals signs. SAM3 researchers have extensive publications related to video magnification.

Video Magnification Application Areas

  • Heart rate, Pulse Transit Time and relative blood pressure assessment
  • Respiration rate assessment
  • Applications using thermal and RGB video
  • Applications using colour and/or motion magnification

IEEE Video Tutorial: 鈥淭he Supportive Smart Home: Solutions Enabling Independence 鈥 Ambient Sensing, Artificial Intelligence in Ethical Context鈥

Smart homes helping older adults live safely and independently

NRC Article on our recent projectOne morning, an older man doesn’t go to the kitchen for breakfast as he usually does. Instead, he’s still sitting …

MUSE (Interaxon) project story

Did you know sleep apnea affects nearly 1 billion adults worldwide? It disrupts breathing, fragments sleep, and raises risk for heart disease, diabetes, and cognitive …

Elhajjar, Diane 鈥淎 Confidence Framework for Heart Rate Estimation in Video Magnification.鈥 MASc diss., 杏吧原创 University, 2023.

Link to Thesis

D. Elhajjar, B. Wallace, A. Law, R. Goubran, F. Knoefel, 鈥淢achine Learning Assessment of Heart Rate Confidence from Video Magnification 鈥, 23rd IEEE International Conference on Bioinformatics and Bioengineering (BIBE), 2023

Link to Paper

R. Goubran, F. Knoefel, B. Wallace, N. Thomas, C. Herdman K. van Benthem, H. Sveistrup, K. Fraser, M. Kunz, P. Xi, A. Law, J. Keillor, 鈥淎GE-WELL SAM3 collaborative projects with NRC Aging-in-Place program鈥, AGE-WELL AGM, 2023.

SAM3 Book 鈥淪upportive Smart Homes: Their Role in Aging in Place鈥 now available

Supportive Smart Homes: Their Role in Aging in Place By: Frank Knoefel, Bruce Wallace, Neil Thomas, Heidi Sveistrup, Rafik Goubran, Christine L. Laurin Our book …

Elhajjar, D., Wallace, B., Law, A., Goubran, R. Knoefel, F., 鈥淎 Confidence Framework through Temporal Averaging for Heart Rate Estimation in Video Magnification鈥 2023 IEEE Sensors Applications Symposium (SAS), 2023.

Link to Paper

D. Elhajjar, B. Wallace, A. Law, R. Goubran, F. Knoefel, 鈥淎ssessing Confidence in Video Magnification Heart Rate Measurement using Multiple ROIs鈥, 2023 IEEE International Instrumentation Measurement Technology Conference (I2MTC), 2023.

Link to Paper

M. Mozafari, A. Law, J. Green, R. Goubran, 鈥淔ace Detection in Thermal Images with Improved Spatial Precision and Temporal Stability鈥, 2023 IEEE International Instrumentation Measurement Technology Conference (I2MTC), 2023.

Link to Paper

Yassin Kassab, L., Law, A., Wallace, B., Larivi猫re-Chartier, J., Goubran, R. Knoefel, F., 鈥淓ffects of Lighting and Window Length on Heart Rate Assessment through Video Magnification鈥 2022 IEEE Sensors Applications Symposium (SAS), 2022

Link to Paper

Yassin Kassab, L., Law, A., Wallace, B., Larivi猫re-Chartier, J., Goubran, R. Knoefel, F., 鈥淭he Effect of Noise on Contactless Heart Rate Measurement using Video Magnification鈥, 2022 IEEE International Instrumentation Measurement Technology Conference (I2MTC), 2022.

Link to paper