Face Detection in Node.JS

gistfile1.js

var cv = require('opencv')

var im = new cv.Image("./examples/test.jpg")
  , face_cascade = new cv.CascadeClassifier("./examples/haarcascade_frontalface_alt.xml")

var faces = face_cascade.detectMultiScale(im, function(err, faces){  
  for (var i=0;i<faces.length; i++){
    var x = faces[i]
    im.ellipse(x.x + x.width/2, x.y + x.height/2, x.width/2, x.height/2);
  }
  im.save('./out.jpg');         
});