A video pattern generator for vision test

A hardware and software system for the generation of video patterns that can be used for various vision tests, particularly depth perception, is presented. 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 ability of moving the objects in the stereogram. The system is based on the TMS34010 graphics processor, operating at 40 MHz. The processor is interfaced to 512 Kb of video random access memory (VRAM), 256 Kb of dynamic random access memory (DRAM), and 16 Kb of erasable programmable read only memory (EPROM). The system also has an RS-232C serial communication part for communicating with a host computer and a red, green, and blue (RGB) video output for connection to an RGB color video monitor which displays the various video patterns. The software developed produces the various patterns and test experiments. A monitor program was also written to aid in developing any new software needed to produce new patterns or test experiments