checkerboard (Image Processing Toolbox)

Create checkerboard image

Syntax

I = checkerboard
I = checkerboard(N)
I = checkerboard(N,P,Q)

Description

I = checkerboard creates a 8-by-8 square checkerboard image that has four identifiable corners. Each square has 10 pixels per side. The light squares on the left half of the checkerboard are white. The light squares on the right half of the checkerboard are gray.

I = checkerboard(N) creates a checkerboard image where each square has N pixels per side.

I = checkerboard(N,P,Q) creates a rectangular checkerboard, where P specifies the number of rows and Q specifies the number of columns. Each row and column is made up of tiles. Each tile contains four squares, N pixels per side, defined as:

```
TILE = [DARK LIGHT; LIGHT DARK]
```

If you omit Q, it defaults to P and the checkerboard is square

Example

Create a checkerboard where the side of every square is 20 pixels in length.

```
I = checkerboard(20);
imshow(I)
```

Create a 2-by-3 rectangular checkerboard.

J = checkerboard(20,2,3);
figure, imshow(J)

Create a black and white checkerboard.

K = (checkerboard > 0.5); 
figure, imshow(K)

See Also

cp2tform, imtransform, maketform

bwunpack cmpermute