​

// based on https://github.com/mtschirs/js-objectdetect

// the jsfeat detector is much faster but only does one object at a time:

// https://inspirit.github.io/jsfeat/sample_haar_face.html

// also see:

// https://github.com/mtschirs/js-objectdetect/blob/master/js/objectdetect.frontalcatface.js

// https://ahprojects.com/projects/cv-dazzle/

​

var w = 640,

    h = 480;

var detector;

var classifier = objectdetect.frontalface;

var img;

var faces;

​

​

function setup() {

    createCanvas(w, h);

    var scaleFactor = 1.2;

    detector = new objectdetect.detector(w, h, scaleFactor, classifier);

    img = loadImage('eniac.jpg', function (img) {

        faces = detector.detect(img.canvas);

    })

}

​

function draw() {

    image(img, 0, 0, w, h);

​

    stroke(255);

    noFill();

    if (faces) {

        faces.forEach(function (face) {

            var count = face[4];

            if (count > 4) { // try different thresholds

                rect(face[0], face[1], face[2], face[3]);

            }

        })

    }

}

​