How to view video characteristics from the camera?

Question

Java

How to view the characteristics of the received image from the camera? Intensity, brightness, etc.

For what: you need to write a heart rate monitor that works through a flash and a camera. As I understand it, the brightness of the image is recorded there and timings are caught between jumps (or dips) of brightness.

By the way, how to catch the time between flashes is also interesting, although I have one collective farm option through a timer and ontick

Answer 1

Calculate the arithmetic average based on each pixel over the entire frame.