CHECKERBOARD

Name

Checkerboard

Purpose

This function returns a 2D image, with boxes of alternating colors.
Checkerboard images are useful in certain types of image processing
procedures and for making blended image masks.

Author

FANNING SOFTWARE CONSULTING
David Fanning, Ph.D.
1645 Sheely Drive
Fort Collins, CO 80526 USA
Phone: 970-221-0438
E-mail: david@idlcoyote.com
Coyote's Guide to IDL Programming: http://www.idlcoyote.com

Calling Sequence

board = Checkerboard()

Return Value

board: A 2D long array of alternating colored boxes.

Arguments

boxes: The number of boxes of alternating colors on each side
of the resulting image. Must be an even integer greater
than or equal to two. Optional. Default is 8 (normal
checkerboard).

Input Keywords

BLACK: The value of the "black" boxes. By default, 0.
WHITE: The value of the "white" boxes. By default, 255.
XSIZE: The X size of the returned image. By default, 400.
YSIZE: The Y size of the returned image. By default, 400.

Common Blocks

None.

Example

IDL> cgImage, Checkerboard()

Modification History

Written by David W. Fanning, 26 September 2007, based on suggestions
of JD Smith on IDL newsgroup 25-26 Septermber 2007.