title: RaspiCam fisheye calibration with OpenCV
body: <p>I am trying to calibrate RaspiCam Fisheye lens camera with OpenCV. I am using Python example code and the cheesboard row and column numbers are also correct but somehow I can not get a successful result. I have tested with a lso much of photos below you can see them. My source code: <a href="https://github.com/jagracar/OpenCV-python-tests/blob/master/OpenCV-tutorials/cameraCalibration/cameraCalibration.py" rel="nofollow noreferrer">https://github.com/jagracar/OpenCV-python-tests/blob/master/OpenCV-tutorials/cameraCalibration/cameraCalibration.py</a></p>
  
  <p>my chess board rows and columns: rows = 9, cols = 6</p>
  
  <p><a href="https://preview.ibb.co/eX9m2y/Screenshot_2.png" rel="nofollow noreferrer"><img src="https://preview.ibb.co/eX9m2y/Screenshot_2.png" alt="images"></a></p>
  
  <p>but does not get a successful result</p>
  
  <p><a href="https://preview.ibb.co/dVGG2y/Screenshot_3.png" rel="nofollow noreferrer"><img src="https://preview.ibb.co/dVGG2y/Screenshot_3.png" alt="images"></a></p>
  
  <p>Edit: my solution</p>
  
  <p><a href="https://gist.github.com/mesutpiskin/0412c44bae399adf1f48007f22bdd22d" rel="nofollow noreferrer">https://gist.github.com/mesutpiskin/0412c44bae399adf1f48007f22bdd22d</a></p>