Raster Graphics and Color

For the past decade low cost computer graphics terminals have consisted almost exclusively of direct view storage tube (DVST) devices.Recently, however, a new variety of terminal based on .raster TV technology. has emerged which is competitive with storage tubes in price and readily supports variable intensity and color.We summarize the basic organization of raster terminals so as to indicate their capabilities, discuss their advantages and disadvantages, and illustrate some of their uses in statistics and elsewhere.Because color is almost universally available on these terminals, we also discuss some elementary principles of color perception and use.An understanding of this material will help the data analyst present data effectively.