title: What feature detector to choose and how to access to the feature points data
body: <p>I would like to know which detector would be the best to do the following task:
  I have two images of a same room taken from a different point of view along the X axis, the camera is not tilting during the translation.</p>
  
  <p>I would like to match a point/ area of the first image to the second one and determine how much pixels would separate those. (from the initial position to the other)
  I know that there are plenty of feature detector in OpenCV, and i would like to use one of the fastest and accurate to do this task. 
  I can have access to the depth values by the way, but I would like to only use the rgb data (in gray scale) to find matching points and determine the distance separating those in pixels.</p>
  
  <p>Could you advise me on this?
  Thank you a lot.</p>