checkerboard

Create checkerboard image

Syntax

I = checkerboard

I = checkerboard(n)

I = checkerboard(n,p,q)

Description

I = checkerboard creates an 8-by-8 square checkerboard image that has four identifiable corners. The checkerboard pattern is made up of tiles. Each tile contains four squares, each with a default of 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.

TILE = [BLACK LIGHT; LIGHT BLACK]

I = checkerboard(n) creates an 8-by-8 square checkerboard image where each square has n pixels per side.

I = checkerboard(n,p,q) creates a rectangular checkerboard image where p specifies the number of rows of tiles and q specifies the number of columns of tiles. If you omit q, the number of columns defaults to p and the checkerboard is square. Each square has n pixels per side.

Examples

Create Square Checkerboard

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

I = checkerboard(20);

Display the checkerboard.

imshow(I)

Create Rectangular Checkerboard

Create a rectangular checkerboard that is 2 tiles high and 3 tiles wide. The side of every square is 20 pixels in length.

J = checkerboard(20,2,3);

Display the checkerboard.

figure
imshow(J)

Create Black and White Checkerboard

Create a black and white checkerboard with the default tile size and the default number of rows and columns.

K = (checkerboard > 0.5);

Display the checkerboard.

figure
imshow(K)

Input Arguments

n — Side length in pixels of each square

10 (default) | positive integer

Side length in pixels of each square in the checkerboard pattern, specified as a positive integer.

p — Number of rows of tiles

4 (default) | positive integer

Number of rows of tiles in the checkerboard pattern, specified as a positive integer. Since there are four squares per tile, there are 2*p rows of squares in the checkerboard.

q — Number of columns of tiles

positive integer

Number of columns of tiles in the checkerboard pattern, specified as a positive integer. If you omit q, the value defaults to p and the checkerboard is square. Since there are four squares per tile, there are 2*q columns of squares in the checkerboard.

Output Arguments

I — Rectangular image with checkerboard pattern

2-D numeric array

Rectangular image with a checkerboard pattern, returned as a 2-D numeric array. The light squares on the left half of the checkerboard are white. The light squares on the right half of the checkerboard are gray.

Data Types: double

Version History

Introduced before R2006a