NCJ Number
208788
Journal
Security Journal Volume: 18 Issue: 1 Dated: 2005 Pages: 19-28
Date Published
2005
Length
10 pages
Annotation
This paper describes the development of a stereoscopic imaging technique that enables a security screener to use binocular stereopsis to enhance the interpretation of the nature of objects portrayed in X-ray imaging.
Abstract
X-ray equipment with binocular stereoscopic capability can produce left and right, two-dimensional views of an object on a single pass through what appears to be a standard X-ray screening unit. The monitor viewed by the screener is fitted with a liquid crystal panel that is switched between its two operation states of transmitting left circularly polarized light and right circularly polarized light synchronized with the perspective images displayed. The screener, wearing correspondingly circularly polarized glasses, completes the high-speed shuttering mechanism to provide cues to the depth of the object being viewed. Current research is investigating kinetic depth X-ray or KDEX imaging. This technique is promising, since a considerable amount of basic research shows that various cues as to depth, especially binocular disparity and the kinetic depth effect, may support each other in producing valid depth perception. A desirable feature of KDEX imaging is the simultaneous acquisition of views during a single pass of the object. This produces high-quality three-dimensional images in the same time interval as conventional two-dimensional X-ray systems. 8 figures and 10 notes