Steve Whealton

Purely Mathematical Imagery

A raster image is one that is created when a computer uses a master formula to determine the color of each pixel within the image area.

Image Algebra is what I call the formulas that determine colors.

Image Geometry is my term for the various ways of converting computer-screen real estate into numbers, and then back again.

Turtle graphics are computerized line drawings.

Imagine yourself crawling around on a vast, blank, canvas. You can turn in any direction. You can go ahead or back any distance. At each stage, you can leave a mark of any color you like, or you can choose to leave no mark at all. You can start and finish when and where you like.

All the turtle images on this Web site (apart from the composite image appearing on the "TURTLE" button just above left) were made by using black lines on a white background.

 

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