本輔助系統(tǒng)是基于非接觸式視覺(jué)跟蹤技術(shù)構(gòu)建的。系統(tǒng)首先利用攝像頭采集眼睛角膜上反射的紅外光源圖像，然后根據(jù)屏幕四個(gè)邊角的參考坐標(biāo)和瞳孔中心的坐標(biāo)計(jì)算出用戶注視到屏幕上的位置；同時(shí)，系統(tǒng)通過(guò)圖像處理的方法識(shí)別是否閉眼從而判斷出用戶的意圖并執(zhí)行相應(yīng)操作。 

        本輔助系統(tǒng)是針對(duì)殘疾人在行動(dòng)上的缺陷而設(shè)計(jì)的，通過(guò)本輔助系統(tǒng)，殘疾人可以獲得行動(dòng)上的自由；同時(shí)，本系統(tǒng)還為殘疾人提供一定的娛樂(lè)功能，使殘疾人能享受正常人的生活。系統(tǒng)的主要功能如下： 
1. 用戶可以通過(guò)眼睛注視屏幕上相應(yīng)的按鈕，實(shí)現(xiàn)輪椅動(dòng)力系統(tǒng)的前進(jìn)、左轉(zhuǎn)、右轉(zhuǎn)、停止等操作，從而實(shí)現(xiàn)自由“移動(dòng)”；
2. 用戶可以通過(guò)眼睛注視相應(yīng)的音樂(lè)播放按鈕，啟動(dòng)音頻播放器，享受美妙的音樂(lè)；
3. 用戶可以通過(guò)視線的移動(dòng)和眼睛的眨動(dòng)的，實(shí)現(xiàn)電子文檔或網(wǎng)頁(yè)的翻閱。
用戶只需通過(guò)短時(shí)間的適應(yīng)性訓(xùn)練即可掌握系統(tǒng)的操作，輕松自由地通過(guò)眼睛來(lái)控制整個(gè)系統(tǒng)。

This assistant system is based on the non-contact visual tracking technology. The camera will capture the image on the cornea which is reflected the infrared light source. Accord to the coordinates of the screen edge and pupil, the system can calculate the position user gazing. Through recognizing the status of eyes, the system can execute the operation.

The assistant system is designed for the disabled persons. Through the system, disable persons can move freely. Furthermore, this system supplies some entertainment functions. The functions of system are show as follow. 
1. The user can move the wheelchair by gazing some directional pads on the screen.
2. The users can operate the music player and enjoy the music by gazing some entertainment buttons.
3. The users can read e-book or browse the web by blinking and moving the sight.
Though a short-time suitable training，the disabled persons can operating this system by their eyes.

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