_pixel_iterator&lt;T*,C&gt;</span> <span class="pre">&gt;</span></code> - for planar
images with non-standard step</li>
</ul>
<p>Of course, one could provide their own custom x-iterator. One such example
described later is an iterator adaptor that performs color conversion when
dereferenced.</p>
<p>Given a horizontal iterator <code class="docutils literal"><span class="pre">XIterator</span></code>, we could choose the <code class="docutils literal"><span class="pre">y-iterator</span></code>,
the iterator th