A common form of noise is "perlin noise". It is often used for generating cloud textures or to create a detail map for graphics / textures.
Here is a website where you can download a project that generates perlin noise with Delphi:
http://www.efg2.com/Lab/Library/Delp...phics/Math.htm
just scroll down the site or text-search for "perlin noise" when the website has opened.
Maybe this helps a little bit?