Image processing and eye movement tracking system for ECS with video capture card

摘要

We have developed eye-gaze AAC system for the people with severe physical disabilities. In this report we describe about new ECS (environment control system) that utilized video capture card system and image processing application. With this system the operator doesn't have to wear sensors or devices to measure eye movement. The system get color eye image through video capture card and this image could be processed in a windows application. Windows application tracks iris and measures its X-Y positions relative for a reference point, even if the operator's head moves. We have utilized this iris position as a switch of ECS. A Werdnig-Hoffmann patients whose voluntary movement is only his eyes, uses this system as a TV control system. A power switch of TV (when he looks it) and cannel (when he rotates his eyeball) can be control by himself.