Bootstrap has a new class named
center-block starting from Bootstrap version 3.0.3
Considering this as your image, you can simply add the
center-block CSS class to your image to center it horizontally within your container:
<img class="center-block" src="myImage.png" />
In case you are using an older version of bootstrap here is the
center-block class implementation you can implement it within your CSS stylesheets:
Hope this helps to solve your problem.