ABSTRACT
Some people presume the term 3D vision to be synonymous with stereo vision. While there are many other ways in which the visual system is able to estimate the three-dimensional spatial structure of the visible environment, information obtained from overlapping views acquired by the two eyes is a primary source of depth perception. The geometry underlying stereo vision is straightforward, though substantial complexities are involved in the required visual processing. This chapter covers the basics of stereo vision and also the visual information associated with accommodation (focus) of the eyes. Accommodation is a source of depth information in its own right. More importantly, however, accommodation and stereo interact in a way that has important implications for stereo image displays.
