title: How to handle camera calibration for opencv at scale
body: <p>I'm using openCV solvePNP algorithm to detect and measure a device's pose from an AR Marker using openCV. My end goal is to get very precise real-world measurements. My app is likely to run on a wide range of iOS and Android devices.</p>
  
  <p>I understand that I need to pass a camera calibration for pose estimation to work accurately. I can print out a checkerboard and measure these values on my own development device, but what's the best way to handle calibration with applications more widely distributed to a large number of users/devices?</p>
  
  <p>Could there possibly be camera calibration tables for various devices I can look up?</p>