Chapter 4Depth, Movement, and Time
Media Illusions
Visual media have always existed in two dimensions. Whether on a page, a theater movie screen, a computer monitor, a TV set, or a smart phone screen, the image has height and width (its aspect ratio) but no depth beyond the measurement of light molecules or pixels. In geometry, we call the width the x-axis, the height the y-axis, and the depth the z-axis (Figure 4.1). Even three-dimensional movies and television (discussed later) are an illusion of three-dimensionality displayed on a two-dimensional screen. Holograms used in conjunction with other new technologies (also discussed later in the chapter) are challenging this reality. However, even as these three-dimensional developments become ...
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