KDPhys: An attention guided 3D to 2D knowledge distillation for real-time video-based physiological measurement. - Nicky Nirlipta Sahoo; Vs Sachidanand; Matcha Naga Gayathri; Balamurali Murugesan; Keerthi Ram; Jayaraj Joseph; Mohanasankar Sivaprakasam (Biomed. Signal Process. Control., 2025)