function calibpts3D = calibpts()
% 3D Coordinate data of the target calibration points 
% All positions are expressed in millimetres
%
% If you run this function by simply typing
%
% >> calibPts = calibpts();
%
% you will end up with a local 12 x 3  matrix variable called
% calibPts containing these data points.

calibpts3D = [
             49   0  65     % x y z coords of point 1
            129   0  65     % x y z coords of point 2
             49   0 145     % etc
            129   0 145
             49   0 225
            129   0 225
              0 129  65
              0  49  65
              0 129 145
              0  49 145
              0 129 225
              0  49 225
];