Contactless blood pressure measurement using remote photoplethysmography (rPPG) is a non-invasive method to estimate blood pressure without physical contact. The technique relies on capturing the subtle variations in facial skin color, which are correlated with blood volume changes.When the heart contracts, it pushes blood through the arteries, causing a pulse wave. This wave leads to variations in blood volume in the microvascular network, which in turn, affects the amount of light absorbed and reflected by the skin. By using a camera or other optical sensor to capture these changes, rPPG can extract the photoplethysmographic signal.Advanced algorithms and machine learning techniques are then employed to analyze the rPPG signal, along with other factors such as heart rate and age. The relationship between these factors and blood pressure is then established allowing for continuous, non-contact blood pressure monitoring, providing real-time insights into the user's health. This contactless approach offers a more convenient and user-friendly way of measuring blood pressure, enabling improved health monitoring and management.