> &lt;<span class="keyword">typename</span> P&gt; <span class="keywordtype">bool</span>   operator!=(<span class="keyword">const</span> P&amp; p)<span class="keyword">    const </span>{ <span class="keywordflow">return</span> !(*<span class="keyword">this</span>==p); }
<a name="l00132"></a>00132 
<a name="l00133"></a>00133     <span class="comment">// homogeneous pixels have operator[]</span>
<a name="l00134"></a>00134     <span class="keyword">typename</span> <a class="code" href="g_i_l_0429.html" title="T