v::Mat_&lt;T&gt; <a class="code" href="namespacefb360__dep_1_1cv__util.html#a6dd5002de80325628b4f217f16e1f615">stackVertical</a>(<span class="keyword">const</span> std::vector&lt;cv::Mat_&lt;T&gt;&gt;&amp; images) {</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  assert(!images.empty());</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;  <span class="keywordflow">if</span> (images.size() == 1) {</div><div class="line"><a name="l00057"></