<body>
  <img src="http://tympanus.net/codrops-playground/assets/images/cssref/properties/mask-image/field.jpg" alt="">
</body>
body {
  background-color: #111;
  color: #555;
  font-size: 1.1em;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

img {
  margin: 20px auto;
  display: block;
  width: 100%;
  height: 400px;
  -webkit-mask-image: url(http://tympanus.net/codrops-playground/assets/images/cssref/properties/mask-image/mask-image.png);
  mask-image: url(http://tympanus.net/codrops-playground/assets/images/cssref/properties/mask-image/mask-image.png);
  -webkit-mask-position: center center;
  mask-position: center center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}