<style>
#div1{
border: 1px solid green;
width: 100%;
height: 300px;
background-color: yellow;
text-align: center;
display : flex;
}
#img1{
height: 100px;
margin: auto;
}
</style>
<div id="div1">
<img id="img1" src="http://politrussia.com/upload/iblock/032/032e40743dba6b8e0ec37a7df1f89889.jpg"/>
</div>