 n=0) : _n(n) {}
<a name="l00363"></a>00363         <span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt; <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn</a>(<span class="keyword">const</span> <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn&lt;P&gt;</a>&amp; d) : _n(d.<