s="lineno">   46</span>&#160;<span class="keyword">using</span> gray4_image_t = bit_aligned_image1_type&lt;4, gray_layout_t&gt;::type;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="keyword">using</span> gray6_image_t = bit_aligned_image1_type&lt;6, gray_layout_t&gt;::type;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">using</span> gray10_image_t = bit_aligned_image1_type&lt;10, gray_layout_t&gt;::typ