DESIGN AND IMPLEMENTATION OF MEASUREMENT BLOCK ON A CONTACTLESS HEART RATE MEASUREMENT SYSTEM USING REMOTE PHOTOPLETHYSMOGRAPHY (RPPG) TECHNOLOGY

• Main Author: Dzaky Prihatmoko, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/70729
• Institution: Institut Teknologi Bandung

Heart rate measurement is an important activity because it can serve as an early indicator of a cardiovascular disease as well as an independent predictor of other diseases in the body. The existing heart rate measurement device requires a direct contact from the measurement sensor with the skin. This creates a limitation for users with sensitive skin and users that do not feel comfortable using the method. The problem raises the need for a contactless heart measurement device that can be used by all people. Contactless heart rate measurement system using RPPG technology acts as a solution to the issue. The part of the system that has a duty of measuring the heart rate of the user using a contactless method is the measurement block. It works using the POS algorithm with two additional preprocessing steps using ASF and CDF. User face is detected using Viola Jones as the face detection algorithm and then tracked using MOSSE tracker. On every frame, the camera collects RGB data from the face. All RGB data are then interpolated and processed until heart rate data is obtained. The block is implemented using python. The system can measure heart rate at a wide range between 60 bpm – 170 bpm. It has an accuracy and precision in MAE ± standard deviation of 3,74 ± 2,56 bpm. It requires a relatively short data collection time of under 16 seconds. The system has been tested and it can work accurately and precisely with distance between the user and the camera between 50 cm – 100 cm and with a lighting condition of 200 lux measured next to the face. Therefore, the result of the testing shows that the measurement block can produce an accurate and precise heart rate data which then makes the contactless heart rate measurement system using RPPG technology as the solution for heart rate measurement especially for the previously mentioned problem.