Creating a center-aligned thumbnail from image
<p>I'm trying to make a site with images on it, but I don't want to have the traditional thumbnail (where it's just a smaller image), I want something like this: <a href="http://imgur.com/r/funny" rel="nofollow">http://imgur.com/r/funny</a> </p>

<p>Notice how all the images' thumbnails are 160x160 and only shows the center of the image. I'd like to do something along those lines.</p>
