title: Difference between BFMatcher and FlannBasedMatcher
body: <p>I would like to know what is the difference in term of precision or quality of the matches between the <code>BFMatcher</code> and <code>FlannBasedMatcher</code> in openCV. I know the <code>FlannBasedMatcher</code> might be faster when applied to a large data base but are the two matcher going to find the same matches at the end regardless of the time of execution?</p>