  A novel data compression scheme is presented. The method is very suitable for
black and white images, and it can generate a compression factor of eight; in
general the bitmap is optimized for an arbitary number of colors and not only
for unused information contained in a conventional bitmap with $2^j$ bits per
pixel. This compression method can be incorporated with other compression
methods; it is suitable for other image types and audio. The potential high
compression factor is cost effective for both memory and bandwidth
requirements.
