Remote Photoplethysmography (rPPG) is a fast-growing technique of vital sign estimation by analyzing video of a person. Several major phenomena affecting rPPG signals have been studied (e.g. video compression, distance from person to camera, skin tone, head motions). However, to develop a highly accurate rPPG method, new, minor, factors should be investigated. First considered factor is irregular frame rate of video recordings. Despite of PPG signal transformation by frame rate irregularity, no significant distortion of PPG signal spectra was found in the experiments. Second factor is rolling shutter effect which generates tiny phase shift of the same PPG signal in different parts of the frame caused by progressive scanning. In particular conditions effect of this artifact could be of the same order of magnitude as physiologically caused phase shifts. Third factor is a size of temporal windows, which could significantly influence the estimated error of vital sign evaluation. It follows that one should account difference in size of processing windows when comparing rPPG methods. Short series of experiments were conducted to estimate importance of these phenomena and to determine necessity of their further comprehensive study.
Biometric Authentication Based on Enhanced Remote Photoplethysmography Signal Morphology
Center for Machine Vision and Signal Analysis, University of Oulu（奥卢大学机器视觉与信号分析中心）；State Key Laboratory of Blockchain and Data Security, Zhejiang University（浙江大学区块链与数据安全国家重点实验室）
HOT: Harmonic-Constrained Optimal Transport for Remote Photoplethysmography Domain Adaptation
VNU University of Engineering and Technology, Hanoi, Vietnam（越南河内国立大学工程与技术大学）；VinUni-Illinois Smart Health Center, VinUniversity, Hanoi, Vietnam（VinUni-Illinois智慧健康中心，VinUniversity，越南河内）；College of Engineering and Computer Science, VinUniversity, Hanoi, Vietnam（VinUniversity工程与计算机科学学院，越南河内）；Center for Innovations in Health Sciences, VinUniversity, Hanoi, Vietnam（VinUniversity健康科学创新中心，越南河内）
FreqPhys: Repurposing Implicit Physiological Frequency Prior for Robust Remote Photoplethysmography
Hefei University of Technology（合肥工业大学）；Hefei Comprehensive National Science Center（合肥综合性国家科学中心）；MBZUAI（穆罕默德·本·扎耶德人工智能大学）；University of Science and Technology Beijing（北京科技大学）；Great Bay University（大湾区大学）
Harbin Institute of Technology, Shenzhen（哈尔滨工业大学（深圳））；Great Bay University（大湾区大学）；Hefei University of Technology（合肥工业大学）；Macao Polytechnic University（澳门理工学院）
Perfusion assessment via local remote photoplethysmography (rPPG)
Fraunhofer Heinrich Hertz Institute（弗劳恩霍夫海因里希·赫兹研究所）；Humboldt-Universität zu Berlin（柏林洪堡大学）；Rostock University Medical Center（罗斯托克大学医学中心）；Charité-Universitätsmedizin Berlin（柏林夏里特医学院）
BTS-rPPG: Orthogonal Butterfly Temporal Shifting for Remote Photoplethysmography
VNU University of Engineering and Technology, Hanoi, Vietnam（越南河内国立大学工程与技术大学）；VinUni-Illinois Smart Health Center, VinUniversity, Hanoi, Vietnam（VinUni-Illinois智能健康中心，VinUniversity，越南河内）；College of Engineering and Computer Science, VinUniversity, Hanoi, Vietnam（VinUniversity工程与计算机科学学院，越南河内）；Center for Innovations in Health Sciences, VinUniversity, Hanoi, Vietnam（VinUniversity健康科学创新中心，越南河内）
Orientation-conditioned Facial Texture Mapping for Video-based Facial Remote Photoplethysmography Estimation
Australian National University（澳大利亚国立大学）；Data61, Commonwealth and Scientific Industrial Research Organization（联邦科学与工业研究组织Data61）；University of Turku（图尔库大学）
PHASE-Net: Physics-Grounded Harmonic Attention System for Efficient Remote Photoplethysmography Measurement
Great Bay University（大湾大学）；Hefei University of Technology（合肥工业大学）；Macao Polytechnic University（澳门 polytechnic 大学）；University of Science and Technology Beijing（北京科技大学）；Harbin Institute of Technology, Shenzhen（哈尔滨工业大学深圳分校）；Dongguan Key Laboratory for Intelligence and Information Technology（东莞智能与信息科技重点实验室）
PhysFlow: Frequency Decoupled with Dual-Field Rectified Flow for Remote Photoplethysmography
PCA Lab, Key Lab of Intelligent Perception and Systems for High-Dimensional Information of Ministry of Education, School of Computer Science and Engineering, Nanjing University of Science and Technology（南京理工大学计算机科学与工程学院教育部高维信息智能感知与系统重点实验室PCA实验室）；College of Computer Science and Technology, Qingdao University（青岛大学计算机科学技术学院）
MVRD-Bench: Multi-View Learning and Benchmarking for Dynamic Remote Photoplethysmography under Occlusion
Nanjing University of Information Science and Technology（南京信息工程大学）；University of Oulu（奥卢大学）；Xi’an Jiaotong University（西安交通大学）；Zhejiang University（浙江大学）
FCUS-rPPG: A Fast-Converging Unsupervised Framework for Remote Photoplethysmography via Gradient Oscillation Suppression
Department of Biomedical Engineering（生物医学工程系）；Anhui Province Key Laboratory of Measuring Theory and Precision Instrument（安徽省测量理论与精密仪器重点实验室）；Hefei University of Technology（合肥工业大学）；Department of Electronic Engineering and Information Science（电子工程与信息科学系）；University of Science and Technology of China（中国科学技术大学）
CanonicalPhys: Pose-Robust Remote Photoplethysmography via Canonical-Space Priors
Center for Machine Vision and Signal Analysis (CMVS), University of Oulu（奥卢大学机器视觉与信号分析中心）；ELLIS Institute Finland（芬兰ELLIS研究所）；Zhejiang University（浙江大学）
Intervention-Based Self-Supervised Learning: A Causal Probe Paradigm for Remote Photoplethysmography
School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230601, PR China（合肥工业大学计算机科学与信息工程学院）；College of Aviation Electronic and Electrical Engineering, Civil Aviation Flight University of China, Guanghan 618307, PR China（中国民航飞行大学航空电子电气工程学院）；School of Computing and Information Technology, Great Bay University, Dongguan 523000, PR China（广东大湾区大学计算机科学与信息工程学院）
Dual-path TokenLearner for Remote Photoplethysmography-based Physiological Measurement with Facial Videos
Hefei University of Technology（合肥工业大学）；Institute of Artificial Intelligence, Hefei Comprehensive National Science Center（合肥综合性国家科学中心人工智能研究院）；The 38th Research Institute of China Electronics Technology Group Corporation（中国电子科技集团公司第三十八研究所）
AutoHR: A Strong End-to-end Baseline for Remote Heart Rate Measurement with Neural Searching
Center for Machine Vision and Signal Analysis, University of Oulu（奥卢大学机器视觉与信号分析中心）；Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences（中国科学院计算技术研究所智能信息处理重点实验室）；University of Chinese Academy of Sciences（中国科学院大学）
