The technological developments of the last ten years have made com-
puter graphics and image processing by computer popular. Pictorial pat-
tern recognition has also shown significant progress. Clearly, there
exist overlapping interests among the three areas of research. Graphic
displays are of concern to anyone involved in image processing or pic-
torial pattern recognition and many problems in graphics require
methodologies from image processing for their solutions. The data
structures used in all three areas are similar. It seems that there is a
common body of knowledge underlying all three areas, pictorial informa-
tion processing by computer. The novelty of these fields makes it
difficult to design a course or to a write a book covering their basic
concepts. Some of the treatises on graphics focus on the hardware and
methods of current interest while treatises on image processing often
emphasize applications and classical signal processing. The fast
evolution of technology causes such material to lose its relevance. For
example, the development of optical fibers has reduced the importance of
bandwidth compression.