rgin ) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Functions for manipulating bounding boxes (bb).

 A bounding box (bb) is also known as a position vector or a rectangle
 object. It is a four element vector with the fields: [x y w h]. A set of
 n bbs can be stores as an [nx4] array, most funcitons below can handle
 either a single or multiple bbs. In addtion, typically [nxm]