Virtual Very Large Images

While very large image typically waste a large amount of Hard Disk space, there is a category of very large images that are Virtual, that is computed on the fly.

The most common type of this is Fractal images. At a given resolution (zoom level) and position, you can get the tile image by computation.

Other that come to my mind are :

• Algorithmic images, such as an image that displays all possible 8 bits RGB colors.
• An image that displays all characters from the Unicode table. Each character can be made to fit one tile and rendered on the fly as it is needed.
• Rasterized images from vectorial description.