Answers for "how to center an image in a div vertically and horizontally"

center an image horizontally and vertically

.center{
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

how to center an image element inside a block in css

img { display:block;
      margin-left: auto;
      margin-right:auto;
      }