The project is in ongoing development, but the main goal is to be able to measure HRV (heart rate variability) via laptop / web camera.
I used this repo for installation on Ubuntu: https://github.com/jitendra29mishra/OpencvInstallation
g++ camera.cpp -o hrv.bin `pkg-config --cflags --libs opencv4`
https://docs.opencv.org/master/db/d28/tutorial_cascade_classifier.html