OpenCV camera calibration example

Based on the example code in http://opencv.jp/sample/camera_calibration.html , rewritten using OpenCV2 and C++ syntax.

calibrate.cc

Estimates camera parameters based on checkerboard patterns in image files.

Example usage:

$ ls image*.png
image0000.png
image0001.png
 ...
image0024.png

$ ./calibrate -cols 8 -rows 5 -size 2.54 -num 25 -output my_camera.xml

undistort.cc

Displays undistorted image using the estimated camera parameters.

Example usage:

$ ./undistort -calib my_camera.xml image.png