You can do the following:
First remove the scaling, as it will appear as a repetition of the image.
div css . div imgDiv
div , .. imgDiv, overflow:hidden ( div - 50px ( 15px)) .
. , .
effet {
width: 400px;
height: 125px;
margin: 0 auto 50px auto;
}
.profile-box {
width: 150px;
height: 150px;
margin-left: 40px;
border: none !important;
padding: 19.5px 10px;
display: block;
}
.min_cir {
border-radius: 50%;
border-radius: 50%;
position: absolute;
top: -20px;
left: -20px;
}
.filtre--r {
-webkit-mask: -webkit-radial-gradient(center, closest-side, transparent 30%, black 80%);
-webkit-mask: radial-gradient(closest-side at center, transparent 50%, black 110%);
-webkit-filter: blur(4px);
mask: url('#mask-radial');
filter: blur(4px);
position: absolute;
top: 0;
left:0;
}
.imgDiv{
border-radius: 50%;
height: 266px;
left: 20px;
overflow: hidden;
position: absolute;
top: 20px;
width: 660px;
}
img{
width: 700px;
height: 306px;
}
<div class="profile-box">
<div class="media">
<a class="pull-left" href="">
<div class="effet">
<img class="filtre filtre--r min_cir" src="http://i.imgur.com/oH1698V.jpg" />
<div class="imgDiv">
<img class="min_cir" src="http://i.imgur.com/oH1698V.jpg">
</div>
</div>
</a>
</div>
</div>