Researchers claim that this method is accurate to within 5 bpm.
Webcams may be installed at places such as childcare centres, offices, shops and private areas to monitor security and general activity.
Webcams have been used for augmented reality experiences online.
A webcam is a video camera that feeds or streams its image in real time to or through a computer to computer network.
When "captured" by the computer, the video stream may be saved, viewed or sent on to other networks via systems such as the internet, and email as an attachment.