Head-Aimed Television

摘要

Foveal-HAT is a closed circuit television system in which a head-coupled viewing device presents a wide-field (68 degrees) television image to the observer. The viewing device is so designed that the observer has freedom to move his head naturally; the head motion is measured and used to direct the aim of the remote camera. Using HAT, an observer can project his visual surveillance ability into the camera location and look about using natural head motions. A novel concept which has been implemented in this system is an image format having a non-uniform distribution of resolving power. Resolving power in the displayed image is distributed in a manner that approximates that of human vision - high in the center to supply high detail information to the eye's foveal vision, and low-resolution data spread over a wide angle to supply the eye's peripheral vision. The displayed image is coupled to the observer's head through a flexible optical relay. Camera aiming is effected by a motor driven gimballed mirror which deflects the optic axes of stationary cameras. A series of experiments were conducted to compare the performance of this system to that of two stick-aimed TV systems. (Author)