title: Recover Pose OpenCV 3.0
body: <p>I have calibrated my pinhole camera using opencv 3.0 and got 4 intrinsic parameters (f_x,f_y,u_0,v_0) plus some distortion coefficients. Using this calibration, I estimate the essential matrix from two images at different positions. Finally I want to recover (R|t) using the recover pose function from opencv 3.0. The interface of this function expects a single focal length, but I have two from the calibration procedure. How can a  get the focal length f=f_y/s_y = f_x/s_x (Definition according to OpenCV) from f_x an f_y so that I can properly use the recover pose function?</p>