div {
    position: absolute;
    width: 200px;
    height: 200px;
  }
  
  img { 
    position: relative;
    width: 625px;
    height: 312px;
  }
  
  .center {    
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%); /* IE 9 */
    -webkit-transform: translate(-50%, -50%); /* Chrome, Safari, Opera */
  }