Auto Crop Images CSS

Diberikan cara-cara untuk auto crop images menggunakan CSS3 

.thumbnail {
  position: relative;
  width: 200px;
  height: 200px;
  overflow: hidden;
}
.thumbnail img {
  position: absolute;
  left: 50%;
  top: 50%;
  height: 100%;
  width: auto;
  -webkit-transform: translate(-50%,-50%);
      -ms-transform: translate(-50%,-50%);
          transform: translate(-50%,-50%);
}
.thumbnail img.portrait {
  width: 100%;
  height: auto;
} 

rujukan :

http://jonathannicol.com/blog/2014/06/16/centre-crop-thumbnails-with-css/