MOBILITY PERFORMANCE WITH A PIXELIZED VISION SYSTEM

被引:164
作者
CHA, K [1 ]
HORCH, KW [1 ]
NORMANN, RA [1 ]
机构
[1] UNIV UTAH,DEPT BIOENGN,2480 MEB,SALT LAKE CITY,UT 84112
关键词
VISUAL PROSTHESIS; MOBILITY; PHOSPHENE SIMULATOR;
D O I
10.1016/0042-6989(92)90229-C
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
A visual prosthesis, based on electrical stimulation of the visual cortex, has been suggested as a means for partially restoring functional vision in the blind. The prosthesis would create a pixelized visual sense consisting of punctate spots of tight (phosphenes). The present study investigated the feasibility of achieving visually-guided mobility with such a visual sense. Psychophysical experiments were conducted on normally sighted human subjects, who were required to walk through a maze which included a series of obstacles, while their visual input was restricted to information from a pixelized vision simulator. Walking speed and number of body contacts with obstacles and walls were measured as a function of pixel number, pixel spacing, object minification, and field of view. The results indicate that a 25 x 25 array of pixels distributed within the foveal visual area could provide useful visually guided mobility in environments not requiring a high degree of pattern recognition.
引用
收藏
页码:1367 / 1372
页数:6
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