d&gt; <span class="keyword">struct </span>is_planar;
<a name="l00046"></a>00046 
<a name="l00047"></a>00047 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt; <span class="keyword">struct </span>color_space_type&lt;const PixelBased&gt; : <span class="keyword">public</span> color_space_type&lt;PixelBased&gt; {};
<a name="l00048"></a>00048 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt; <span class="keyword">struct </sp