A microcomputer-based video-pattern generator for binocular vision test

This paper presents a hardware and software system for the generation of video patterns that can be used for various vision tests, particularly depth perception. Among the capabilities of the system is generation of static and dynamic random dot stereograms that can be used to test depth perception. The system generates the patterns in real time which provides the capability of moving the objects in the stereogram. This feature is very useful in testing depth perception among infants and noncommunicative people by correlating the movement of the eye with the movement of the object. The other patterns are the checkerboards, vertical and horizontal bars with a capability to sweep the size of the checkers and bars. These latter patterns are useful for testing vision acuity. The system is based on the TMS34010 graphics processor and is connected to a host computer through an RS-232C serial communication port. It has an RGB video output for connection to an RGB color video monitor to display the various video patterns. The application and system software is written in assembly language which is efficient for real-time applications