Is it possible to determine where the viewer's gaze is directed on the monitor using the image from the webcam?

Question

Image processing

Such a device is called Eye Tracker , but it is quite expensive. Is it possible to make the "Eye Tracker" yourself, the laptop camera will not work?
Why do I need it? I want that when watching films in English, if I look at subtitles, the playback speed changes (decreases) and highlights automatic translation.

Answer 1

Use "on-hover" mouse cursor or "hot-key": SPACE or radio button -> cheaper and easier.
In general, you can put 1 camera from 5 Mpx or more and catch the shift of the pupils from the video stream. (Better than 2 cameras at the corners of the monitor.)
Lower resolution - will not allow you to catch the change in the position of the pupils.
(you can try interpolation with zoom on a regular (built into the cover) camera 1.3, etc., but I think that this will not give the expected effect)

Answer 2

So you also need to not only track your gaze, but also slow down the video somewhere.
And yes, it's possible. Keywords for Google: eye tracking webcam
, you can also add the word software