blink-detection

Blink Detection

Use machine learning in JavaScript to detect a blink and build blink-controlled experiences!

Demo

Visit https://blink-detection.vercel.app (Works on mobile too!!)

Uses Tensorflow.js's face landmark detection model.

Detection

This tool detects when the user blinks. It can also detect a wink and separate eye blinks as well.

Installation

Via npm:

Using yarn:

$ yarn add blink-detection

How to use

Code sample

Start by importing it:

import blink from 'blink-detection';

Load the machine learning model:

await blink.loadModel();

Then, set up the camera feed needed for the detection. The setUpCamera method needs a video HTML element and, optionally, a camera device ID if you are using more than the default webcam.

const videoElement = document.querySelector('video');

const init = async () => {
  // Using the default webcam
  await gaze.setUpCamera(videoElement);

  // Or, using more camera input devices
  const mediaDevices = await navigator.mediaDevices.enumerateDevices();
  const camera = mediaDevices.find(
    (device) =>
      device.kind === 'videoinput' &&
      device.label.includes(/* The label from the list of available devices*/)
  );

  await gaze.setUpCamera(videoElement, camera.deviceId);
};

Run the predictions:

const predict = async () => {
  const blinkPrediction = await blink.getBlinkPrediction();
  console.log('Blink: ', blinkPrediction); // will return an object indicating the booleans for different states
  // expect blinkPrediction to be {
  //  blink: boolean,
  //  wink: boolean,
  //  longBlink: boolean,
  //  left: boolean,
  //  right: boolean,
  //  rate: number
  // }
  if (blinkPrediction.blink) {
    // do something when the user blinks
  }
  let raf = requestAnimationFrame(predict);
};
predict();

Stop the detection:

cancelAnimationFrame(raf);