<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<h2>Opacity with Box</h2>
<p>Hover over the image to see the effect.</p>
<div class="container">
<img src="https://www.w3schools.com/howto/img_avatar.png" alt="Avatar" class="image">
<div class="middle">
<div class="text">John Doe</div>
</div>
</div>
<div class="container">
<img src="https://www.w3schools.com/howto/img_avatar.png" alt="Avatar" class="image">
<div class="middle">
<div class="text">John Doe</div>
</div>
</div>
<div class="container">
<img src="https://www.w3schools.com/howto/img_avatar.png" alt="Avatar" class="image">
<div class="middle">
<div class="text">John Doe</div>
</div>