What is Tracking System

Many modern museum exhibits employ interactive digital installations that can display content on large public surfaces, such as tabletops, walls, floors, etc. Recently, such displays have begun to include special devices that are able to track the user position and thus offer a personalized rendering with respect to the user point of view. While many qualitative evaluations of such systems exist, little effort has been done to define a quantitative testing framework. This is mainly due to the subjective nature of this kind of experience, which makes it difficult to produce objective data with standardized and repeatable procedures. With this chapter, the authors introduce a metric and a practical setup that can be adopted to evaluate a wide range of viewer-dependent displays.