Matlab drawing checkerboard (camera calibration)

MATLAB The 3D graphics made have a default view angle , You can usually control the view by using the camera toolbar （ For details, please refer to MATLAB help ）. The most intuitive calibration of the camera is done by the checkerboard . Use here fill3 Function to draw a checkerboard ：

function [] = chessborad(d,h,n,m)
% d  Control the distribution of checkerboards 
% n,m  Control the length and width of the checkerboard respectively 

hold on
z = [h h h h h]; %  The height position of the checkerboard in the coordinate system 

for i = -n:d:n
    for j = -m:d:m
     
     x = [i-d/2 i+d/2 i+d/2 i-d/2 i-d/2];
     y = [j-d/2 j-d/2 j+d/2 j+d/2 j-d/2];
     
     if mod(i+j,2)==0
         c = [0 0 0];
     else
         c = [1 1 1];
     end
     
     s = fill3(x,y,z,c,'Edgecolor','none');
     alpha(s,.3);
     hold on
     
    end
end

axis equal off

% camera settings  View the checker's response to the camera 
campos([0 -11 15])
camtarget([0 -1 0.5])
camlight(0,70)
camzoom(1.5)
camproj('perspective')

end

Input in the command line window

chessborad(1,0,20,20);

Available