PPG (Photoplethysmography) is a non-invasive method for measuring blood flow and vital signs in the body. It works by using light to detect changes in the volume of blood vessels. PPG technology is commonly used in medical settings, such as hospitals and clinics, but it is also being used in wearable devices like smartwatches and fitness trackers.
rPPG stands for remote photoplethysmography, which is a method of measuring blood flow using a camera or other optical sensor. Instead of requiring physical contact with the skin, rPPG can be performed from a distance, making it useful for monitoring large groups of people or for applications where physical contact is not possible or desirable. rPPG technology is still relatively new, but it has the potential to revolutionize many industries, including healthcare, insurance, and care management.