html:
<div id="imgs">
<img src="http://pic.616pic.com/ys_b_img/00/03/60/Kt6QwnlaEu.jpg" >
</div>
css:
#imgs {
width: 100vw;
height: 100vh;
display:table-cell;
text-align:center;
vertical-align:middle;
}
img{
width: 100px;
height: 100px;
}
原文：https://www.cnblogs.com/webSong/p/9373924.html