Both the VPM and AOI present considerable resource conservation tools for CIG systems applications and design considerations. The AOI concept provides a technique whereby the visual system capacity can be more efficiently utilized by dynamically concentrating image detail in the critical area of the display. Since CIG system costs are directly proportional to the system edge generation capacity, an AOI presentation offers a considerable cost saving potential. The VPM is a unique tool that provides the researcher with an exact definition of the visual systems configuration for any given experiment. It allows the modeler and the engineer access to parameters that influence data base requirements and special-purpose hardware designs.