examples/face_tag_friends.html

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title>tracking.js - tag friends</title>
  <link rel="stylesheet" href="assets/demo.css">

  <script src="../build/tracking-min.js"></script>
  <script src="../build/data/face-min.js"></script>

  <style>
  #photo:hover .rect {
    opacity: .75;
    transition: opacity .75s ease-out;
  }

  .rect:hover * {
    opacity: 1;
  }

  .rect {
    border-radius: 2px;
    border: 3px solid white;
    box-shadow: 0 16px 28px 0 rgba(0, 0, 0, 0.3);
    cursor: pointer;
    left: -1000px;
    opacity: 0;
    position: absolute;
    top: -1000px;
  }

  .arrow {
    border-bottom: 10px solid white;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    height: 0;
    width: 0;
    position: absolute;
    left: 50%;
    margin-left: -5px;
    bottom: -12px;
    opacity: 0;
  }

  input {
    border: 0px;
    bottom: -42px;
    color: #a64ceb;
    font-size: 15px;
    height: 30px;
    left: 50%;
    margin-left: -90px;
    opacity: 0;
    outline: none;
    position: absolute;
    text-align: center;
    width: 180px;
    transition: opacity .35s ease-out;
  }

  #img {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -173px 0 0 -300px;
  }
  </style>
</head>
<body>
  <div class="demo-title">
    <p><a href="http://trackingjs.com" target="_parent">tracking.js</a> － hover image to see all faces detected</p>
  </div>

  <div class="demo-frame">
    <div class="demo-container">
      <span id="photo"><img id="img" src="assets/faces.jpg" /></span>
    </div>
  </div>

  <script>
    window.onload = function() {
      var img = document.getElementById('img');

      var tracker = new tracking.ObjectTracker('face');

      tracking.track(img, tracker);

      tracker.on('track', function(event) {
        event.data.forEach(function(rect) {
          plotRectangle(rect.x, rect.y, rect.width, rect.height);
        });
      });

      var friends = [ 'Thomas Middleditch', 'Martin Starr', 'Zach Woods' ];

      var plotRectangle = function(x, y, w, h) {
        var rect = document.createElement('div');
        var arrow = document.createElement('div');
        var input = document.createElement('input');

        input.value = friends.pop();

        rect.onclick = function name() {
          input.select();
        };

        arrow.classList.add('arrow');
        rect.classList.add('rect');

        rect.appendChild(input);
        rect.appendChild(arrow);
        document.getElementById('photo').appendChild(rect);

        rect.style.width = w + 'px';
        rect.style.height = h + 'px';
        rect.style.left = (img.offsetLeft + x) + 'px';
        rect.style.top = (img.offsetTop + y) + 'px';
      };
    };
  </script>

</body>
</html>