<div class="cp_imghover cp_blur">
<img src="img.jpg">
</div>
.cp_imghover {
overflow: hidden;
width: 400px;
height: 400px;
margin: 20px auto;
border: 10px solid #ffffff;
box-shadow: 0 0 5px #cccccc;
cursor: pointer;
}
/*BLUR*/
.cp_blur img {
-webkit-transition: all 1s ease;
transition: all 1s ease;
-webkit-filter: blur(5px);
filter: blur(5px);
}
.cp_blur img:hover {
-webkit-filter: blur(0px);
filter: blur(0px);
}