Website that can determine your heartrate using ambient lighting and a camera.
Timespan: July-August 2020
Hey! This is Andy. Here's the link to the website that can find your heartrate.
I recently came across this app that used a smartphone camera and flashlight to calculate your heartrate. This relies on the fact that oxygenated blood and deoxygenated blood have different colors, and it's noticeable on a smartphone camera. In fact, one of my favorite party tricks is to start recording a video on my phone while pressing my finger on the camera, and show people how you can see my pulse as the color on the video pulses a darker color occasionally. Try it yourself!
Anyway, I thought to myself that it must be a simple matter to move this app's functionality onto a website. So I did. Using HTML webcam access, I even found out that ambient light is often enough to see the pulse against (especially if you have the help of a computer).
After that, it was pretty much done! Just added some instructions and graph for the FFT to help me do the bin-to-frequency conversion.