e;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keyword">using</span> gray12_image_t = bit_aligned_image1_type&lt;12, gray_layout_t&gt;::type;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="keyword">using</span> gray14_image_t = bit_aligned_image1_type&lt;14, gray_layout_t&gt;::type;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="keyword">using</span> gray24_im