Comparative Analysis of Face ROI Outline Algorithms for Contactless Heart Rate Measurement Under Different Registration Conditions

Contactless heart rate measurement techniques can be applied in medical and biometrical tasks such as vital signs measurement and vitality detection. Incorrect measurement result can cause serious consequences. The paper presents the results of experimental studies aimed at comparing algorithms for face images processing for contactless heart rate measurement using video analysis. Algorithms based on color segmentation and facial landmarks are performed. A method for evaluating the effectiveness of algorithms and data acquisition process are described. The least heart rate measurement error is shown by algorithm based on a grid with the nodes at facial landmarks formation and independent signal calculation for each grid sector.