
Visual displays 93
and the target image, and fov is the system field of view, measured in
degrees. The field of view is an angle created by the left edge of the image,
the eye, and the right edge of the image. Its close relative, the field of
vision, is considered later on in this chapter. It follows from Equation 5.1
that high- resolution television aords a clearer image at a longer viewing
distance. For a period of time very large televisions (greater than 91 cm or
36 in diagonal) were popular enough to support their manufacture, but
not universally so. Users placed them in rooms in homes that had shorter
than optimal viewing distances. As a ...