 routines:</a></li>
               <li><a href="#13">Display image and extension of left and top boundaries:</a></li>
               <li><a href="#14">Multi-scale pyramids</a></li>
               <li><a href="#15">A Laplacian pyramid:</a></li>
               <li><a href="#16">Wavelet/QMF pyramids:</a></li>
               <li><a href="#17">Steerable pyramid:</a></li>
               <li><a href="#18">Steerable pyramid, constructed in frequency domain:</a></li>
            </ul>
         </div>
<h2>Load an ima