Wenjin Wang (Computer Vision for Healthcare, CV保健)

Computer Vision for Healthcare

Biography

Wenjin Wang received the B.Sc. degree in Biomedical Engineering (in top class) from Northeastern University, Shenyang, China, in 2011 and the M.Sc. degree in Artificial Intelligence (with full scholarship) from University of Amsterdam, The Netherlands, in 2013. In 2017 (October 23rd), he received the Ph.D. degree from Eindhoven University of Technology, The Netherlands, by defending his Ph.D. thesis entitled "Robust and Automatic Remote Photoplethysmography".

Currently, he is a scientist at Philips Research Eindhoven, working on camera based health monitoring. In June 2019, he was appointed as the assistant professor of Eindhoven University of Technology, The Netherlands, closely work with the Electronic Systems group and Signal Processing Systems group of the Department of Electrical Engineering, on the research of "camera based health monitoring". He is a guest editor for IEEE-JBHI and Sensors, associate editor for IET Healthcare Technology Letters. He is now involved in a MSc course teaching (Video Health Monitoring) at TU Eindhoven. He is working on the Philips VitalEye product.

Contact: wwang@tue.nl

If you are interested in my doctorate defense ceremony on rPPG, please find my PhD thesis, defense video, and defense slides here. [PhD thesis] [defense video] [defense slides]

Our POS paper received the Best Paper Award (2nd place) from TBME after 7 years since its publication in 2016. Only 3 lines of Matlab code! Time will tell. [video demo with code]

News

(New!) We have 3 journal papers accepted by IEEE-JBHI/IOTJ/TIM; designed a dual-wavelength defocused speckle imaging method to measure two SCG-signals from the heart for BP measurement; validated multi-wavelength + multi-site PTT based BP measurement on neonates in NICU; proposed a fast framework for real-time epileptic seizure monitoring...

We have 2 journal papers accepted by IEEE-TBME and Physiological Measurement, one uses defocused speckle imaging to measure LVET from cardiac motion contactlessly (first time!!), and the other uses camera-PPG to measure cardiac-respiratory indices in a full fitness cycle (typically after exercise as it is an important window for scanning heart diseases).

We have 1 journal paper accepted by IEEE-JBHI, using the Text-to-Image Generation technology (diffusion model) to train an AI classification model for infant suffocation risk detection via a camera (e.g. when infant oralnosal is occluded by other objects). The trained model has been deployed on the product for baby monitoring!!!

We have 1 journal paper accepted by BOE, first time of using a thermal camera to measure CPTD of newborns for circulation check! Must be integrated with the RGB-camera product for infant care! More ideas for using thermal cameras to enable new measurements in NICU are coming ...

We have 2 journal papers accepted by IEEE-JBHI and IEEE-IOT, one is using camera respiratory imaging to assess the infant thoracoabdominal patterns (e.g. chest or belly breathing), the other combines defocused speckle imaging and defocused rPPG to measure multiple vital signs (including PTT-based blood pressure) for privacy-protected sleep monitoring.

We have 1 journal paper accepted by IEEE-TBME (IF: 4.756), a first clinical validation in China that uses a video camera for whole-night sleep monitoring and sleep staging (classify 4 sleep stages including wake-REM-light-deep)! Without fancy deep learning but solid and explainable steps that are reproducible! Video-PSG has both the academic and commerical values, Very cool and very important!!!

We have 1 journal paper accepted by IEEE-JBHI (IF: 7.7), using multi-task learning to detect and reason the infant cries. Audio signals can be combined with video signals for infant health monitoring in the near future!

We have 1 journal paper accepted by IEEE-TBME (IF: 4.756), using dual-wavelength skin depolarization property for skin perfusion analysis. The concept has been its feasibility on the anesthetic surgery patients in the Department of Anesthesia!!

We have 1 journal paper accepted by IEEE-JBHI (IF: 7.7), first time of using structured light for living-skin detection! The method was validated in the hospital NICU and can be extended for face anti-spoofing, will lead a new value stream of using *structured light* to replace ambient or LED light for contactless physiological measurement....

We have 1 journal paper accepted by IEEE-IOT (IF: 10.6), using a camera to measure Heart Rate Variability (HRV) of newborns for estimating the maturity of neonatal ANS development. The method has been validated in a multi-center clinical trial involving three hospitals. Very inspiring!!

We are organizing a new special issue on IEEE-JBHI (IF: 7.7), namely "Camera-based Health Monitoring in Hospitals". Submit a journal paper!

Check our special issue here: https://www.embs.org/jbhi/special-issues/

We have 1 journal paper accepted by IEEE-TIM (IF: 5.6). Combining multi-wavelength PTT features and multi-site PTT features measured by a camera for more robust blood pressure estimation! The method was validated on 20+ ICU patients. We are implementing it into the product.

We have 1 journal paper accepted by IEEE-JBHI (IF: 7.7), addressed the important issue of privacy protection for camera-based sleep monitoring by using a defocused camera, i.e. optically blurred images secure the privacy but still allow certain measurement of human physiology and semantics for sleep analysis. Seems like a final product solution for sleep monitoring! Will be transferred! !

We have 1 journal paper accepted by IEEE-IOT (IF: 10.6), first time using camera-based respiratory imaging to assess the lung rehabilitation of thoracic patients after surgery, and benchmarked it with CT/X-ray ground-truth. Very interesting!!

We have 7 papers accepted by IEEE-EMBC 2024, on various interesting topics including PAT justification, camera-BP measurement, fitness, camera-exposure smart control, infant actigraphy, etc.

We have 1 journal paper accepted by IEEE-TIM (IF: 5.6). A dual-center clinical study of camera-based cardiorespiratory monitoring (HR, HRV, RR, RRV) on 50 preterm infants! Data was collected over 2 years!

We have 1 journal paper accepted by IEEE-JBHI. We conduct a multi-center clinical trial in 4 hospitals to investigate the infant sleep-wake classification based on facial attributes. The designed algorithm was implemented on an embedded chip for real-time processing and we made it open-source, very fast!

We have 1 journal paper accepted by IEEE-JBHI, a new approach that uses defocused speckle imaging to measure SCG signals from cardiac contractions for remote HRV monitoring, very interesting! !

We will organize the 7th CVPM Workshop on CVPR 2024, please consider to submit a paper and join the workshop! The submission deadline is March 1st, 2024. Submission site is

https://www.es.ele.tue.nl/cvpm24/

We have 1 journal paper accepted by IEEE-TBME, a new measurement principle that uses multi-spectral depolarization of skin-tissues for living-skin detection. It only requires 5 lines of Matlab code!

We have 1 journal paper accepted by Biomedical Optics Express, the first clinical showcase of camera-based monitoring of *absolute* SpO2 values on preterm infants in NICU (MAE < 4%).

We have 2 journal papers accepted. One is by Nature NPJ Digital Medicine (IF: 15.357), a review on clinical applications of video health monitoring, the other is by IEEE Transactions on Instrumentation and Measurement, on camera-based blood pressure monitoring (IF: 5.332).

We have 4 papers accepted by IEEE Healthcom 2023 (Chongqing, China), on topics of infant HRV, sleep privacy protection, infant sleep analysis and contactless blood pressure.

We have 1 paper accepted by Military Medical Research (Springer Nature, IF: 21.1, TOP medicine journal), on the topic of intelligent stethoscopes. The first paper collaborated with Prof. Nanshan Zhong (钟南山院士，共和国勋章获得者).

We have 1 paper accepted by IEEE-IoT journal (IF: 10.238), on the clinical trials we organized for camera-based ICU patient monitoring, to support the claims of FDA and NMPA registration as the medical device.

We have 2 papers accepted by IEEE-BHI 2023 (Pittsburgh, USA), focused on plantar perfusion imaging for PAD diagnosis and intelligent stethoscope based on Transformers...

We organized a tutorial on CVPR 2023 (Canada) "Contactless Healthcare using Cameras and Wireless Sensors" [Link]

Organizers: Wenjin Wang, Xuyu Wang, Daniel McDuff

We organized a tutorial on ICASSP 2023 (Greece) "No Touch Needed: Contact-Free Physiological Sensing for Fitness and Healthcare Using Cameras and RF Signals" [Link]

Organizers: Chau-Wai Wong, Min Wu, Chenshu Wu, Wenjin Wang

We have 12 papers accepted by IEEE-EMBC 2023, a new milestone collaborating with hospitals!!! including NICU, ICU, sleep staging, thoracic surgery, blood pressure, SpO2, fitness HRV, infant acoustics, etc.

We have 2 papers accepted by CVPM 2023 on CVPR! about eye state monitoring of ICU patients, infant body attributes estimation.

We have 3 papers accepted by IEEE ICASSP (including wireless stethoscope, ICU hand hygiene monitoring, automotive HR monitoring). ICASSP is the top speech/audio conference.

General announcement

1. The 6th CVPM workshop will be organized at CVPR 2023 (in Canada)! Submission deadline is March 10th, 2023. The submission site is here, welcome to submit !

Organizers: SUSTech, Google Research, TU/e, MIT

2. We received the 2nd Prize of IEEE Engineering in Medicine and Biology Prize Paper Award from IEEE 2022, for the paper "Algorithmic Principles of Remote-PPG" published on TBME.

3. IEEE JBHI special issue 2022

We are going to organize a new special issue for IEEE-JBHI (impact factor: 5.772), namely "Camera-based health monitoring in real-world scenarios". The SI focuses on concrete and societal values of camera-based health monitoring in real-world applications (e.g. clinical trials, products). After so-many years R&D, it is time to show its values in applications and realize our promises deposited in earlier articles. The SI submission site is Here. Welcome to submit!

4. CVPM workshop on CVPR 2022

We are going to organize the 5th International Workshop on Computer Vision for Physiological Measurement (CVPM) on CVPR 2022 (fully virtual). The submission site is Here, submission deadline is March 10th, 2022. ACCEPTED workshop papers (with 70% extension on content) will be encouraged to submit to our special issued on IEEE-JBHI! Welcome to submit!

5. IEEE BHI 2021

We are invited to organize a special session of "Contactless Vital Signs Monitoring for AI Health" on IEEE-BHI 2021 (fully virtual, July 27th - 30th, 2021). Here is the Link. We invited 5 speakers contributed to our Elsevier book to give keynotes, including camera-based and RF-based wireless health monitoring.

Organizers: Wenjin Wang (Philips Research), Xuyu Wang (California State University, Sacramento)

6. CVPR tutorial 2021

We are invited to organize a tutorial on "Computer Vision for Physiological Measurement and Health Care" on CVPR 2021 (fully virtual, June 19th - 25th, 2021). Here is the Link.

Organizers: Wenjin Wang (Philips Research), Gerard de Haan (TU Eindhoven), Lalit K. Mestha (UT Arlington), Xiaobai Li (University of Oulu), Shiguang Shan (Chinese Academy of Sciences)

7. CVPM Workshop on CVPR 2021

We are going to organize the 4th International Workshop on Computer Vision for Physiological Measurement (CVPM) on CVPR 2021 (fully virtual, June 19th - 25th, 2021). Here is the submission website for CVPM workshop (submission deadline is March 5th, 2021). We look forward to your submission!

Organizers: Wenjin Wang (Philips Research), Daniel McDuff (Microsoft Research), Sander Stuijk (Eindhoven University of Technology)

8. Special Issue on IEEE-JBHI journal (Impact factor: 4.217)

We are currently organizing a special issue of "Camera-Based Monitoring for Pervasive Healthcare Informatics" on the IEEE Journal of Biomedical and Health Informatics (JBHI, impact factor: 4.217). The special issue will recruit papers on camera-based healthcare applications. See here for submission. The reviewing starts as soon as you submit the manuscript.

Guest editors: Wenjin Wang (Philips Research, TU Eindhoven), Steffen Leonhardt (RWTH Aachen University), Lionel Tarassenko (University of Oxford), Caifeng Shan (Philips Research), Daniel McDuff (Microsoft Research)

9. Special Issue on Sensors (Impact factor: 3.275)

We are currently organizing a special issue of "Contactless sensors for healthcare" on Sensors, aiming at various contactless sensing modalities for health monitoring (especially the use cases combating COVID-19). It is not limited to cameras, but also includes other wireless sensors, such as radio frequency, acoustic, capacitive and magnetic sensors. See here for submission. The reviewing starts as soon as you submit the manuscript.

Guest editors: Wenjin Wang (Philips Research, TU Eindhoven), Steffen Leonhardt (RWTH Aachen University), Daqing Zhang (Telecom SudParis/Peking University), Bert den Brinker (Philips Research)

10. Tutorial on CVPR 2020

We are selected to organize a tutorial on CVPR 2020 (Seattle, Washington, U.S., June 14th - 19th, 2020). The tutorial is entitled "Contactless health monitoring with AI". It is the first time for us to bring camera and RF sensing (e.g. radar, WiFi, RFID, etc.) together for health monitoring on CVPR tutorial. The tutorial consists of three parts: camera-based monitoring, RF-based monitoring, camera+RF based monitoring. [link]

Organizers: Wenjin Wang (Philips Research), Gerard de Haan (Eindhoven University of Technology), Shiwen Mao (Auburn University), Xuyu Wang (California State University, Sacramento), Mingmin Zhao (MIT)

11. CVPM Workshop and Challenge on CVPR 2020

We are going to organize the International Workshop and Challenge on Computer Vision for Physiological Measurement (CVPM) on CVPR 2020 (Seattle, Washington, U.S., June 14th - 19th, 2020). Here is the submission website for CVPM workshop (submission deadline is March 1st, 2020). Here is the list of accepted papers for CVPM 2020.

Organizers: Wenjin Wang* (Philips Research), Xiaobai Li* (University of Oulu), Daniel McDuff (Microsoft Research), Sander Stuijk (Eindhoven University of Technology), Hu Han (Chinese Academy of Sciences), Antitza Dantcheva (Inria), Guoying Zhao (University of Oulu), Shiguang Shan (Chinese Academy of Sciences)

12. IEEE MELECON 2020

I am involved as the Technical Program Committee for IEEE-MELECON conference 2020 (Palermo, June 16-18, 2020). Please consider to submit a paper to the Track of Smart Health Care. We will review.

13. Tutorial on CVPR 2019

We are invited to organize a tutorial on CVPR 2019 (Long Beach, CA, U.S., June 16th, 2019) [Here is the link]. The tutorial is entitled "Camera based physiological measurement". We will give an (in-depth) overview on the recent advances in this field, and also the *latest* technologies/propositions developed by our group for various applications (e.g. VitalEye product, Vital Mirror, Vital Signs APP, etc.) and tested in clinical trials. Some things are first time to show!

Organizers: Wenjin Wang (Philips Research), Sveta Zinger (Eindhoven University of Technology), Gerard de Haan (Eindhoven University of Technology)

14. Invited session on EMBC 2019

We are going to organize an invited session on EMBC 2019 (Berlin, Germany, July 24-27, 2019). The session is entitled "The future of optical health monitoring - Measuring vital signs and brain activity non-invasively".

It will be the first session that brings camera/optical based vital signs monitoring and brain activity monitoring together. Seven speakers from both areas will present their works at the session and discuss opportunities of bringing these two technologies together in a joint effort with the audience. Look forward to meeting you and discussing with you at the session! [Here is the flyer] [Here is the website]

Organizers: Wenjin Wang (Philips Research), Hubin Zhao (UCL & Cambridge University), Sander Stuijk (Eindhoven University of Technology)

15. Launched Vital Signs APP!

In the collaboration with an insurance company, our vital signs monitoring functions have been built in a commercialized APP and launched (i.e. a core algorithm and a processing architecture have been used). You can download here...

Demos

Publications

Book

(NEW!) Our Elsevier Book 《Contactless Vital Signs Monitoring》 is online now! A first book that systematically introduces various contactless and wireless sensing technologies (e.g. camera, radar, WiFi, acoustics, RFID, etc.) for vital signs monitoring and healthcare! [Book link]

Book editors: Wenjin Wang, Xuyu Wang

Book chapters

A. C. den Brinker, and W. Wang, “Model-based Camera-PPG,” Elsevier Science and Technology Book: Contactless vital signs monitoring, 2021.
W. Wang, and A. C. den Brinker, “Camera-based Respiration Monitoring,” Elsevier Science and Technology Book: Contactless vital signs monitoring, 2021.
K. Natarajan, M. Yavarimanesh, W. Wang, and R. Mukkamala, “Camera-based Blood Pressure Monitoring,” Elsevier Science and Technology Book: Contactless vital signs monitoring, 2021.

Journal papers

(NEW!) L. Liu, Q. Wei, H. Li, C. Shan, and W. Wang, "Camera-based Dual-Wavelength Defocused Speckle Imaging for Multi-Point Seismocardiographic Motion Measurement", IEEE Journal of Biomedical and Health Informatics, 2025. [PDF]
(NEW!) Y. Zeng, Y. Zhu, X. Song, Q. Wang, J. Yang, and W. Wang, "Camera-based Neonatal Blood Pressure Estimation from Multisite and Multiwavelength Pulse Transit Time - A Proof of Concept in NICU", IEEE Internet of Things Journal, 2025. (Accepted)
(NEW!) S. Qiu, W. Wang, C. Zhou, X. Song, J. Yang, and H. Jiao, "A Two-Stage Prediction + Detection Framework for Real-Time Epileptic Seizure Monitoring", IEEE Transactions on Instrumentation and Measurement, 2025. (Accepted)
(NEW!) Z. Zhou, J. Huang, H. Li, L. Liu, Y. Zhu, C. Shan, and W. Wang, "Camera Seismocardiogram based Monitoring of Left Ventricular Ejection Time", IEEE Transactions on Biomedical Engineering, 2025. [PDF]
(NEW!) C. Xiao, C. Tan, L. Song, H. Lu, and W. Wang, "Camera-based Cardio-respiratory Monitoring Across the Full Fitness Cycle", Physiological Measurement, 2025. [PDF] [code and dataset]
(NEW!) D. Huang, C. Liao, J. Mai, X. He, L. Pan, M. Xia, H. Lai, X. Yang, Z. Lin, and W. Wang, "Camera-based Infant Suffocation Risk Detection via Text-to-Image Generation for Guarding Sleep Safety", IEEE Journal of Biomedical and Health Informatics, 2025. [PDF]
N. Zhang, X. Song, J. He, F. Liang, J. Yang, and W. Wang, "Thermal Imaging based Core Peripheral Temperature Difference Measurement for Neonatal Monitoring in NICU", Biomedical Optics Express, 2025. [PDF]
Z. Hou, D. Huang, Y. Huang, J. Huang, N. Zhao, L. Pan, H. Lu, C. Shan, and W. Wang, "Exploiting Multi-wavelength Morphological Features of Camera-PPG for Blood Pressure Estimation", IEEE Transactions on Instrumentation and Measurement, 2025. [PDF]
Y. Ge, Y. Zhu, S. Liagat, D. Huang, L. Yu, C. Tang, M. lmran, W. Wang, and Q. H. Abbasil, "Implementation of Voxel Selective Ellipse Normalization to Enhance Radar Respiration Estimation in Metallic Chamber", IEEE Internet of Things Journal, 2025. [PDF]
Y. Zhu, Y. Ge, Q. Wei, Y. Huang, D. Huang, PC Yuen, F. Xiao, and W. Wang, "Camera-based Bi-modal PPG-SCG: Sleep Privacy-protected Contactless Vital Signs Monitoring", IEEE Internet of Things Journal, 2024. [PDF]
D. Huang, Y. Zeng, Y. Zhu, X. Song, L. Pan, J. Yang, Y. Wang, H. Lu, and W. Wang, "Camera-Based Respiratory Imaging System for Monitoring Infant Thoracoabdominal Patterns of Respiration", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF]
Q. Wang, H. Cheng, and W. Wang, "Video-PSG: An Intelligent Contactless Monitoring System for Sleep Staging", IEEE Transactions on Biomedical Engineering, 2024. [PDF]
M. Xia, D. Huang, and W. Wang, "Multi-task Learning for Audio-based Infant Cry Detection and Reasoning", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF]
L. Huang, F. Ye, H. Shu, Y. Huang, S. Wang, Q. Wu, H. Lu, and W. Wang, "Exploiting Dual-Wavelength Depolarization of Skin-tissues for Camera-based Perfusion Monitoring", IEEE Transactions on Biomedical Engineering, 2024. [PDF]
Z. Wang, C. Liao, L. Pan, H. Lu, C. Shan, and W. Wang, "Living-Skin Detection based on Spatio-Temporal Analysis of Structured Light Pattern", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF] [Matlab Code]
C. Liao, Y. Zeng, C. Tan, D. Yu, X. Song, L. Pan, C. He, Y. Wang, J. Yang, H. Lu, J. Ji, and W. Wang, "Camera-based Heart Rate Variability for Estimating the Maturity of Neonatal Autonomic Nervous System", IEEE Internet of Things Journal, 2024. [PDF]
Y. Huang, D. Huang, J. Huang, G. Wang, L. Pan, H. Lu, M. He, and W. Wang, "Camera-based Blood Pressure Monitoring based on Multi-site and Multi-wavelength Pulse Transit Time Features", IEEE Transactions on Instrumentation and Measurement, 2024. [PDF]
Y. Zhu, H. Hong and W. Wang, "Privacy-protected Contactless Sleep Parameters Measurement using A Defocused Camera", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF]
D. Huang, X. Tao, Y. Huang, Y. Wang, Y. Zhu, K. Qiao, H. Lu, and W. Wang, "Camera-based Respiratory Imaging for Intelligent Rehabilitation Assessment of Thoracic Surgery Patients", IEEE Internet of Things Journal, 2024. [PDF]
Y. Zeng, D. Yu, X. Song, Q. Wang, L. Pan, H. Lu, and W. Wang, "Camera-based Cardiorespiratory Monitoring of Preterm Infants in NICU", IEEE Transactions on Instrumentation and Measurement, 2024. [PDF]
G. Slapnicar, W. Wang, and M. Lustrek, "Generalized channel separation algorithms for accurate camera-based multi-wavelength PTT and BP estimation", Biomedical Optics Express, 2024. [PDF]
D. Huang, D. Yu, Y. Zeng, X. Song, L. Pan, J. He, L. Ren, J. Yang, H. Lu, and W. Wang, "Generalized Camera-based Infant Sleep-Wake Monitoring in NICUs: A Multi-center Clinical Trial", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF]
L. Liu, D. Yu, H. Lu, C. Shan, and W. Wang, "Camera-based Seismocardiogram for Heart Rate Variability Monitoring", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF]
W. Wang, H. Shu, H. Lu, M. Xu, and X. Ji, "Multispectral Depolarization based Living-skin Detection: A New Measurement Principle", IEEE Transactions on Biomedical Engineering, 2024. [PDF] [Matlab code]
W. Wang, C. Shan, S. Leonhardt, M. Ramakrishna, and E. Nowara, "Guest Editorial Camera-Based Health Monitoring in Real-world Scenarios", IEEE Journal of Biomedical and Health Informatics, 2024. [PDF]
Y. Ye, L. Pan, D. Yu, D. Gu, H. Lu, and W. Wang, "Notch RGB-Camera based SpO2 Estimation: A Clinical Trial in Neonatal Intensive Care Unit", Biomedical Optics Express, 2023. [PDF]
B. Huang, S. Hu, Z. Liu, C. Lin, J. Su, C. Zhao, L. Wang, and W. Wang, "Challenges and Prospects of Visual Contactless Physiological Monitoring in Clinical Study", NPJ Digital Medicine, 2023. [PDF]
G. Liao, H. Lu, C. Shan, and W. Wang, "Plethysmographic Waveform Features and Hemodynamic Features for Camera-based Blood Pressure Estimation", IEEE Transactions on Instrumentation and Measurement, 2023. [PDF]
D. Huang, J. Huang, K. Qiao, N. Zhong, H. Lu, and W. Wang, "Deep learning-based lung sound analysis for intelligent stethoscope", Springer Nature Military Medical Research, 10(40), 2023. [PDF]

(The paper collaborated with Prof. Nanshan Zhong 钟南山院士，more results are coming...)

H. Wang, J. Huang, G. Wang, H. Lu and W. Wang, "Contactless Patient Care using Hospital IoT: CCTV Camera based Physiological Monitoring in ICU", IEEE Internet of Things Journal, 2023. [PDF]
D. Wang, X. Yang, J. Wu, and W. Wang, "Personalized Modeling of Blood Pressure with Photoplethysmography: An Error-feedback Incremental Support Vector Regression Model", IEEE Internet of Things Journal, 2023. [PDF]
G. Slapnicar, W. Wang, and M. Lustrek, "Feasibility of Remote Blood Pressure Estimation via Narrow-band Multi-wavelength Pulse Transit Time", ACM Transactions on Sensor Networks, 2023. [PDF]
X. Wang, R. Su, W. Xie, W. Wang, Y. Xu, R. Mann, J. Han, T. Tan, “2.75D: Boosting learning by representing 3D Medical imaging to 2D features for small data”, Biomedical Signal Processing and Control, vol. 84, pp. 104858, 2023. [PDF]
D. Huang, L. Wang, and W. Wang, "A Multi-center Clinical Trial for Wireless Stethoscope-based Diagnosis and Prognosis of Children Community-acquired Pneumonia", in IEEE Transactions on Biomedical Engineering, 2023. [PDF]
S. Qiu, W. Wang, and H. Jiao, "A Lightweight Deep Learning Model for Real-Time Epileptic Seizure Detection", in IEEE Journal of Biomedical and Health Informatics, 2022. [PDF]
W. Wang, S. Weiss, A. C. Den Brinker, J. H. Wuelbern, A. G. Tormo, I. Pappous, and J. Senegas, "Fundamentals of Camera-PPG based Magnetic Resonance Imaging," in IEEE Journal of Biomedical and Health Informatics, 2022. [PDF]

"A delayed article,... MR/CT medical imaging is a valuable showcase for camera-PPG."

W. Wang, and A. C. den Brinker, “Algorithmic Insights for Camera-based Respiratory Motion Extraction,” Physiological Measurement, 2022. [PDF]

"simpler is better, measure respiration in 10 lines code ..."

Z. Jin, J. Huang, W. Wang, A. Xiong, and X. Tan, "Estimating Human Weight from A Single Image", IEEE Transactions on Multimedia, 2022. [PDF]
Z. Jin, J. Huang, A. Xiong, Y. Pang, W. Wang, and B. Ding, "Attention guided deep features for accurate body mass index estimation", Pattern Recognition Letters, 154, 22-28, 2022. [PDF]
D. Wang, X. Yang, L. Ma, L. Li, and W. Wang, "Photoplethysmography-Based Blood Pressure Estimation Combining Filter-wrapper Collaborated Feature Selection with LASSO-LSTM Model," in IEEE Transactions on Instrumentation and Measurement, 2021. [PDF]
Q. Zhan, W. Wang, and X. Ding, "Examination of Potential of Thermopile-Based Contactless Respiratory Gating", Sensors 21 (16), 5525, 2021. [PDF]
W. Wang, S. Leonhardt, L. Tarassenko, C. Shan, and D. McDuff, "Guest Editorial: Camera-Based Monitoring for Pervasive Healthcare Informatics," in IEEE Journal of Biomedical and Health Informatics, 25 (5), 1358-1360, 2021. [PDF]
M. van Gastel, W. Wang, and W. Verkruijsse, “Reducing the effects of parallax in camera-based pulse-oximetry,” Biomedical Optics Express, 12 (5), 2813 - 2824, 2021. [PDF]
G. Slapnicar, W. Wang, and M. Lustrek, “Classification of Hemodynamics Scenarios from a Public Radar Dataset Using a Deep Learning Approach,” Sensors 21(5), 1836, 2021. [PDF]
Y. Sun, J. Hu, W. Wang, M. He, and P.H. N. de With, "Camera-based discomfort detection using multi-channel attention 3D-CNN for hospitalized infants," Quantitative Imaging in Medicine and Surgery, 11 (7), 2021. [PDF]
X. Long, J. Espina Perez, R. Otte, W. Wang, R. M. Aarts and P. Andriessen, “Video-based actigraphy as a contact-free measure for assessing preterm infant sleep,” Acta Paediatrica, 2020. [PDF]
M. Bahache, J. P. Lemayian, W. Wang, and J. M. Hamamreh, “An Inclusive Survey of Contactless Wireless Sensing: A Technology Used for Remotely Monitoring Vital Signs Has the Potential to Combating COVID-19,” RS Open Journal on Innovative Communication Technologies, 2020. [PDF]
W. Wang, L. Vosters, and A. C. den Brinker, “Continuous-spectrum Infrared Illuminator for Camera-PPG in Darkness,” Sensors, 20(11), 2020. [PDF]

"home-built light source. An important part of product but has been overlooked..."

W. Wang, and A. C. den Brinker, “Modified RGB Cameras for Infrared Remote-PPG,” IEEE Transactions on Biomedical Engineering, 67(10), 2893-2904, 2020. [PDF]
Q. Zhan, W. Wang, and G. de Haan, “Analysis of CNN-based remote-PPG to understand limitations and sensitivities,” Biomedical Optics Express, 11(3), 1268 - 1283, 2020. [PDF]
W. Wang, A. C. den Brinker, and G. de Haan, “Discriminative Signatures for Remote-PPG,” IEEE Transactions on Biomedical Engineering, 67(5), 1462-1473, 2019. [PDF] [Demo]

"still simple and understandable, in a few lines of Matlab code..."

W. Wang, and C. Shan, “Impact of Makeup on Remote-PPG Monitoring,” Biomedical Physics & Engineering Express, 6 (3), 035004, 2019. [PDF]
Y. Sun, T. Tan, T. Tong, C. Shan, W. Wang, A. Pourtaherian, and P. H.N. de With, “Detecting Discomfort in Infants through Facial Expressions,” Physiological Measurement, vol. 40, no. 11, pp. 115006, 2019. [PDF]
Y. Sun, W. Wang, X. Long, M. Meftah, T. Tan, C. Shan, R. M. Aarts, P. H.N. De With, “Respiration monitoring for premature neonates in NICU”, Applied Science, vol. 9, no. 23, pp. 5246, 2019. [PDF]
W. Wang, A. C. den Brinker, and G. de Haan, “Single Element Remote-PPG,” IEEE Transactions on Biomedical Engineering, 2018. (accepted, DOI: 10.1109/TBME.2018.2882396) [PDF] [Demo]
W. Wang, A. C. den Brinker, and G. de Haan, “Full video pulse extraction,” Biomedical Optics Express, vol. 9, no. 8, pp. 3898–3914, 2018. [PDF]
A. V. Moco, L. Z. Mondragon, W. Wang, S. Stuijk, and G. de Haan, “Camera-based assessment of arterial stiffness and wave reflection parameters from neck micro-motion,” Physiological Measurement, vol. 28, no. 8, pp. 1576, 2017. [PDF]
W. Wang, A. C. den Brinker, S. Stuijk, and G. de Haan, “Robust heart rate from fitness videos,” Physiological Measurement, vol. 38, no. 6, pp. 1023–1044, 2017. [PDF] [Demo] [Code] [Dataset]
W. Wang, S. Stuijk, and G. de Haan, “Living-skin classification via remote-PPG,” IEEE Transactions on Biomedical Engineering, vol. 64, no. 12, pp. 2781–2792, 2017. [PDF]
W. Wang, A. C. den Brinker, S. Stuijk, and G. de Haan, “Amplitude-selective filtering for remote-PPG,” Biomedical Optics Express, vol. 8, no. 3, pp. 1965–1980, 2017. [PDF]
W. Wang, A. C. den Brinker, S. Stuijk, and G. de Haan, “Algorithmic principles of remote-PPG,” IEEE Transactions on Biomedical Engineering, vol. 64, no. 7, pp. 1479–1491, 2017.[PDF] [Demo] [Code]
W. Wang, S. Stuijk, and G. de Haan, “A novel algorithm for remote photoplethysmography : spatial subspace rotation,” IEEE Transactions on Biomedical Engineering, vol. 63, no. 9, pp. 1974–1984, Sept. 2016. (featured article) [PDF] [Demo]
W. Wang, S. Stuijk, and G. de Haan, “Unsupervised subject detection via remote-PPG,” IEEE Transactions on Biomedical Engineering, vol. 62, no. 11, pp. 2629–2637, Nov. 2015. [PDF] [Demo]
W. Wang, S. Stuijk, and G. de Haan, “Exploiting spatial redundancy of image sensor for motion robust rPPG,” IEEE Transactions on Biomedical Engineering, vol. 62, no. 2, pp. 415–425, Feb. 2015. (featured article, most cited 2015/2016) [PDF] [Demo] "爆款, 不解释"
R. M. Seepers, W. Wang, G. de Haan, I. Sourdis, and C. Strydis, “Attacks on heartbeat-based security using remote photoplethysmography,” Journal of Biomedical and Health Informatics, vol. 22, no. 3, pp. 714–721, 2018. [PDF]
R.J.M Janssen, W. Wang, A.V. Moco, and G. de Haan, “Video-based respiration monitoring with automatic region of interest detection,” Physiological Measurement, vol. 37, no. 1, pp. 100–114, 2015. [PDF]

Conference papers

[NEW!] S. Yi, D. Yu, Y. Zhu, and W. Wang, Illumination-robust Camera-PPG via Skin-Guided Auto-Exposure, 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
[NEW!] Z. Xu, Y. Huang, N. Zhao, J. Huang, H. Lu, and W. Wang, Can Camera-PPG Imaging be Used to Measure Perfusion Index? 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
[NEW!] Z. Hou, Y. Huang, J. Huang, Y. Lv, N. Zhao, H. Lu, C. Shan, and W. Wang, Can Pulse Arrival Time be Used for Cuffless Blood Pressure Estimation? A Clinical Study in ICU, 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
[NEW!] M. Xia, D. Huang, and W. Wang, A Multi-task Model for Infant Crying Detection and Reasoning, 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
[NEW!] Y. Zeng, L. Pan, X. Song, Q. Wang, J. Yang, H. Lu, and W. Wang, Video-based Body Parsing for Neonatal Body-parts Actigraphy: A Clinical Study in NICU, 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
[NEW!] C. Xiao, S. Yi, D. Yu, and W. Wang, Dynamic Exposure Controlling and Suppression for Highly Robust Remote-PPG in Fitness, 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
[NEW!] H. Shu, D. Huang, L. Huang, L. Pan, J. Huang, H. Lu, and W. Wang, Skin Depolarization for Living-skin Tissue Segmentation: A Quantitative Comparison with PPG Imaging, 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2024. [Accepted]
G. Liao, Y. Huang, H. Lu, C. Shan, and W. Wang, Wavelength-dependency of PPG Morphological Features for Camera-based Blood Pressure Estimation, IEEE International Conference on E-health Networking, Application & Services, 2023. [PDF]
Y. Zhu, J. Huang, H. Lu, and W. Wang, Privacy Protected Contactless Cardio-respiratory Monitoring using Defocused Cameras during Sleep, IEEE International Conference on E-health Networking, Application & Services, 2023. [PDF]
Y. Yuan, D. Huang, L. Ren, X. Song, L. Pan, H. Lu and W. Wang, A Multi-center Clinical Trial for Camera-based Infant Sleep and Awake Detection in Neonatal Intensive Care Unit, IEEE International Conference on E-health Networking, Application & Services, 2023. [PDF]
Y. Zeng, C. Tan, D. Yu, X. Song, L. Pan, H. Lu and W. Wang, Camera-based Monitoring of Heart Rate Variability for Preterm Infants in Neonatal Intensive Care Unit, IEEE International Conference on E-health Networking, Application & Services, 2023. [PDF]
C. Wu, D. Huang, X. Tao, K. Qiao, H. Lu, and W. Wang, Intelligent Stethoscope using Full Self-Attention Mechanism for Abnormal Respiratory Sound Recognition, IEEE International Conference on Biomedical and Health Informatics (BHI), 2023. [PDF]
Y. Huang, D. Huang, J. Wu, H. Lu, M. He, and W. Wang, Camera-based Plantar Perfusion Imaging for Detecting Lower Limb Arterial Blockage, IEEE International Conference on Biomedical and Health Informatics (BHI), 2023. [PDF]
D. Huang, L. Ren, H. Lu, and W. Wang, A Scene Adaption Framework for Infant Cry Detection in Obstetrics, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Z. Wang, C. Shan, and W. Wang, Living-skin Detection using Multi-layer Skin Property Perceived by the Structured Light, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Q. Wang, H. Cheng, and W. Wang, Feasibility of Exploiting Physiological and Motion Features for Camera-based Sleep Staging: A Clinical Study, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Y. Ye, D. Gu, and W. Wang, Impact of Different Skin Penetration Depths of Red and Green Wavelengths on Camera-based SpO2 Measurement, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Y. Huang, D. Huang, J. Huang, H. Lu, M. He, and W. Wang, Camera Wavelength Selection for Multi-wavelength Pulse Transit Time based Blood Pressure Monitoring, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
C. Wu, D. Huang, L. Ren, H. Lu, and W. Wang, A Large-Scale Clinical Benchmark of ResNet-based Deep Models for Newborn Face Recognition, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Y. Zhang, X. Tao, H. Lu, K. Qiao, and W. Wang, Camera-based Respiratory Imaging for Thoracic Asymmetry in Thoracic Surgery Patients, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Y. Wang, Z. Jin, J. Huang, H. Lu, and W. Wang, Facial Landmark based BMI Analysis for Pervasive Health Informatics, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Y. Zhu, Y. Zeng, D. Huang, J. Huang, H. Lu, and W. Wang, Occlusion-robust Sleep Posture Detection using Body Rolling Motion in a Video, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
C. Tan, C. Xiao, and W. Wang, Camera-based Cardiovascular Screening based on Heart Rate and Its Variability In Pre- and Post-Exercise Conditions, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
Y. Zeng, X. Song, J. Yang, and W. Wang, Time-domain Features of Angular-velocity Signals for Camera-based Respiratory RoI detection: A Clinical Study in NICU, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
W. Huang, J. Huang, G. Wang, H. Lu, M. He, and W. Wang, A Pilot Study of Deep Learning Models for Camera based Hand Hygiene Monitoring in ICU, 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023. [PDF]
H. Wang, W. H, J. Huang, G. W, H. Lu, and W. Wang, Camera based Eye State Estimation for ICU Patients: A Pilot Clinical Study, in Proceedings of IEEE conference on Computer Vision and Pattern Recognition Workshops, Vancouver, Canada, June 2023. [PDF]
H. Shu, L. Ren, L. Pan, D. Huang, H. Lu, and W. Wang, Single Image based Infant Body Height and Weight Estimation, in Proceedings of IEEE conference on Computer Vision and Pattern Recognition Workshops, Vancouver, Canada, June 2023. [PDF]
W. Huang, J. Huang, G. Wang, H. Lu, M. He, and W. Wang, Exploiting CCTV Cameras For Hand Hygiene Recognition In ICU, IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2023. [PDF] [ICU dataset]
D. Huang, L. Wang, H. Lu, and W. Wang, A Contrastive Embedding-based Domain Adaptation Method for Lung Sound Recognition in Children Community-acquired Pneumonia, IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2023. [PDF]
Z. Wang, X. Yang, H. Lu, C. Shan, and W. Wang, Benchmark of Physiological Model based and Deep Learning based Remote Photoplethysmography in Automotive Applications, IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2023. [PDF]
H. Wang, J. Huang, G. Wang, H. Lu, and W. Wang, Surveillance Camera-based Cardio-respiratory Monitoring for Critical Patients in ICU, IEEE International Conference on Biomedical and Health Informatics (BHI), 2022. [PDF]
G. Slapnicar, W. Wang, and M. Lustrek, Feasibility of Remote Pulse Transit Time Estimation Using Narrow-band Multi-wavelength Camera Photoplethysmography, IEEE International Conference on Biomedical and Health Informatics (BHI), 2022. [PDF]
Y. Zeng, X. Song, H. Chen, W. Huang, and W. Wang, A Multi-modal Clinical Dataset for Critically-Ill and Premature Infant Monitoring: EEG and Videos, IEEE International Conference on Biomedical and Health Informatics (BHI), 2022. [PDF]
G. Liao, C. Shan, and W. Wang, Comparison of PPG and BCG Features for Camera-based Blood Pressure Estimation by Ice Water Stimulation, IEEE International Conference on Biomedical and Health Informatics (BHI), 2022. [PDF]
W. Wang, L. Vosters and B. den Brinker, “Modified Camera Setups for Day-And-Night Pulse-Rate Monitoring”, 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2021. [PDF]
K. van Noord, W. Wang, and H. Jiao, “Insights of 3D Input CNN in EEG-Based Emotion Recognition”, 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2021. [PDF]
X. Ding, W. Wang, Y. Chen, Y. Yang, Y. Zhao, and D. Kong, “Feasibility Study of Pulse Width at Half Amplitude of Camera PPG for Contactless Blood Pressure Estimation”, 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2021. [PDF]
Q. Zhan, J. Hu, Z. Yu, X. Li, and W. Wang, “Revisiting motion-based respiration measurement from videos”, 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2020. [PDF]
Y. Sun, D. Kommers, T. Tan, W. Wang, X. Long, C. Shan, C. van Pul, R. M. Aarts, P. Andriessen, and P. H.N. de With, “Automated Discomfort Detection for Premature Infants in NICU Using Time-Frequency Feature-Images and CNNs”, SPIE medical imaging 2020 (Houston, USA), Feb. 2020.
Y. Sun, D. R. Kommers, W. Wang, R. Joshi, C. Shan, T. Tan, R. M. Aarts, C. van Pul, P. Andriessen, and P. H. N. de With, “Automatic and continuous discomfort detection for premature infants in a NICU using video-based motion analysis,” accepted for the 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019. [PDF]
J. Hu, Y. He, J. Liu, M. He, and W. Wang, “Illumination robust heart-rate extraction from single-wavelength infrared camera using spatial-channel expansion,” accepted for the 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019. [PDF]
S. Wang, J. Liu, M. He, and W. Wang, “Unsupervised face anti-spoofing using dual cameras based feature matching,” accepted for the 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019. [PDF]
T.J.H Vogels, M.J.H. van Gastel, W. Wang, and G. de Haan, “Fully-automatic camera-based pulse-oximetry during sleep,” in Proceedings of IEEE conference on Computer Vision and Pattern Recognition Workshops, Utah, USA, June 2018, pp. 1349-1357. [PDF]
W. Wang, A. C. den Brinker, S. Stuijk, and G. de Haan, “Color-distortion filtering for remote photoplethysmography,” in Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition, Washington D.C., USA, June 2017, pp. 1–1. (oral) [PDF] [Code]
W. Wang, B. Balmaekers, and G. de Haan, “Quality metric for camera-based pulse rate monitoring in fitness exercise,” in Proceedings of IEEE International Conference on Image Processing, Arizona, USA, Sept. 2016, pp. 2430–2434. [PDF]
S. Fernando, W. Wang, I. Kirenko, G. de Haan, S. Bambang Oetomo, H. Corporaal, and J. van Dalfsen, “Feasibility of contactless pulse rate monitoring of neonates using google glass,” in Proceedings of EAI International Conference on Wireless Mobile Communication and Healthcare, London, UK, Oct. 2015, pp. 198–201. [PDF]
R. van Luijtelaar, W. Wang, S. Stuijk, and G. de Haan, “Automatic RoI detection for camera-based pulse-rate measurement,” in Proceedings of Asian Conference on Computer Vision Workshops, Singapore, Nov. 2014, pp. 360–374. [PDF]

Patent applications/grants

W. Wang, B. den Brinker, A. G. Tormo A, I. Pappous, S. Weiss, J. H. Wuelbern, P. Mazurkewitz, J. Senegas, and T. Netsch, "Image and signal processing system for camera-based cardiac triggering in MRI", 2020P00933EP, July 2021.
S. Weiss, W. Wang, B. den Brinker, and A. G. Tormo A, "PPG delay prediction based on patient anatomy", 2021P00392EP, July 2021.
R. Wijshoff, J. Muehlsteff, and W. Wang, "Headband with optically transparent window to suppress the venous contribution and increase the arterial pulse amplitude in remote forehead photoplethysmography measurements", 2020ID00323, July 2021.
W. Wang, and I. Kirenko, “Robust vital signs monitoring on hand-held devices using dual cameras with visible and invisible wavelengths”, Patent application, 2019PF00500, Sept. 2019.
W. Wang, “Highly dynamic range vital signs extraction”, Patent application, 2019PF00501, Sept. 2019.
W. Verkruijsse, W. Wang, A. Moco, N. Lamber, and E. Mena Benito, “Device, system and method for determining oxygen saturation of a subject”, Patent application, 2019PF00506, Sept. 2019.
W. Wang, "Non-linear adaptive camera registration with spatio-temporal geometric constraints", 2019PF00164 (4046F2283EP1), May 2019.
W. Wang, B. den Brinker, and G. de Haan, "Video PPG optimization by including distortion information", Patent application, 2018PF01177EP, Dec. 2018.
G. de haan and W. Wang, "Reliable skin-detection for remote photoplethysmography", Patent application 2018P00316EP, June. 2018.
W. Wang, G. de haan, and A. C. den Brinker, "Remote PPG-extraction from polluted region-of-interest", Patent application 2017P01673EP, Aug. 2017.
W. Wang, A. C. den Brinker, and G. de haan, “Full-video pulse extraction”, Patent application 2017P01628EP, Aug. 2017.
A. C. den Brinker, W. Wang, and G. de haan, “Pulsatility detection for aliveness detection or ROI setting of vital signs measurements,” Patent application 2016PF01196, Feb. 2017.
G. de haan, A. C. den Brinker, and W. Wang, “Robust remote PPG using energy priors to weight spectral components,” Patent application 2016PF00918, Oct. 2016.
W. Wang and G. de haan, “Target-classification for remote PPG,” Patent application 2015P015 92, Feb. 2016.
W. Wang and G. de haan, “Living tissue detection for vital signs camera,” Patent application WO 2016/185004 A1, Nov. 2016.
W. Wang and G. de haan, “Finding living tissue over a broad range of scale in an image sequence,” Patent application WO 2016/184703 A1, Nov. 2016.
G. de haan and W. Wang, “Determining a pulse signal from a video sequence,” Patent application WO 2016/184705 A1, Nov. 2016.

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