Contactless Measurement of Heart Rate, Heart Rate Variability, Breathing Rate and Blood Pressure Using Remote Photoplethysmography

Inclusion Criteria: * Age ≥ 18 years * Ability to read and write in Polish or English * Ability to operate a mobile device and a laptop without requiring glasses * Ability to understand the study procedure * Ability to communicate and follow instructions from the study personnel * Provision of written informed consent for participation in the study and for the processing of personal data by the research team and the study sponsor * Blood pressure values in accordance with the distribution of the study group Exclusion Criteria: * Pregnancy * Age below 18 years * Failure to provide the required information in the participant's informational questionnaire * Non-compliance with the study procedure or instructions from the study personnel * Extensive facial skin damage (e.g., abrasions, wounds, burns) * A disease process affecting a significant portion of the face * Extensive facial dressing * Extensive facial tattoos or facial painting * Significant facial deformity (e.g., tumor) * Inability to maintain a stable head position during measurement * Persistent cough preventing stillness during measurement * Respiratory dysfunction such as dyspnea, irregular or shallow breathing * Diagnosed arrhythmia (except for sinus bradycardia or sinus tachycardia) * Moderate or severe anemia * Diagnosed conditions such as left ventricular systolic dysfunction, aortic valve stenosis, or other cardiac or circulatory diseases leading to low stroke volume, low pulse amplitude, or pulsus paradoxus…