Creating checkerboard image without inbuilt function and for loop

Hi,

I saw this code online and it works! It can indeed generate the checboard image but I hope you can enlighten me how each line actually works in creating the checkboard.

Thank you!

im=255*ones(800,800,'uint8');

im(1:100,101:200,:)=zeros(100,100,'uint8');
im(1:100,201:400,:)=im(1:100,1:200,:);
im(1:100,401:800,:)=im(1:100,1:400,:);
im(101:200,1:700,:)=im(1:100,101:800,:);

im(201:400,:,:)=im(1:200,:,:);
im(401:800,:,:)=im(1:400,:,:);


imshow(im)

rectangle('position',[1 1 799 799]);

Answer 1

[Prudhvi Peddagoni]

Hi,

In the image matrix, 255 means highest intensity (white) and 0 means lowest intensity(black). First the white background is created and later the black boxes are added to it. You can add imshow(im) command after each step and instead of running the whole code, you can use step button to run each command and see the changes.

hope this helps.