); im(C3);
  figure(4); im(abs(C1-C2));  figure(5); im(abs(C2-C3));

 See also <a href="xeucn.html" class="code" title="function C = xeucn( A, T, shape )">XEUCN</a>, <a href="xcorrn.html" class="code" title="function C = xcorrn( A, T, shape )">XCORRN</a>, <a href="convnFast.html" class="code" title="function C = convnFast( A, B, shape )">CONVNFAST</a>

 Piotr's Computer Vision Matlab Toolbox      Version 2.0
 Copyright 2014 Piotr Dollar.  [pdollar-at-gmail.com]
 Licensed under the Simplified BSD License [se