checkerboard problems, please help me

checkerboard=checkerboard(64,8,8);

checkerboard=(checkerboard>0.5);

checkerboard=bwlabel(checkerboard,8);

Here the use of the rand function error occurs with me,,

Answer 1

[Walter Roberson]

When you call checkerboard that first time, you assign to a variable named "checkerboard". As soon as you do that, "checkerboard" stops referring to the function in that workspace and starts referring to the variable. You would not be able to call the function again in that workspace unless you cleared the variable.

[abory kikla]

Well, I used the rand function but the result is an image in one color and not colored chess:

J = checkerboard(10,5,5);

>> J=(J>0.5);

>> J = bwlabel(J,8);

>> ra=rand(20,3,4);

>> RGB = ind2rgb(J,ra);

>> imshow(RGB);

[Walter Roberson]

http://www.mathworks.com/help/matlab/ref/ind2rgb.html

"The colormap, map, is a three-column array of values in the range [0,1]. Each row of map is a three-element RGB triplet that specifies the red, green, and blue components of a single color of the colormap. "

[Walter Roberson]

One thing to keep in mind is that your checkboard is going to look something like

 0 0 1 1
 0 0 1 1
 1 1 0 0
 1 1 0 0

Notice that the upper right and lower left are connected by the diagonal. You are requesting 8 connection for bwlabel so that includes the diagonals. Everything is going to be detected as belonging to the same image. You should be requesting 4 connection instead of 8.