title: Construct manually a vector <Dmatch> in opencv
body: <p>I have a set of points <code>&lt;Point2f&gt; Left</code> and another <code>&lt;Point2f&gt; Right</code>, that could have the same or different <code>size()</code>. I know that the first point in Left corresponds to the first point in Right etc. Is there a way to construct a <code>vector &lt;Dmatch&gt; matches</code> in order to proceed, e.g. to draw them using <code>drawMatches</code>? I am using c++.</p>