基于視覺跟蹤技術(shù)的殘疾人輔助系統(tǒng)

        本輔助系統(tǒng)是基于非接觸式視覺跟蹤技術(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)屏幕四個邊角的參考坐標和瞳孔中心的坐標計算出用戶注視到屏幕上的位置；同時，系統(tǒng)通過圖像處理的方法識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)是針對殘疾人在行動上的缺陷而設(shè)計的，通過本輔助系統(tǒng)，殘疾人可以獲得行動上的自由；同時，本系統(tǒng)還為殘疾人提供一定的娛樂功能，使殘疾人能享受正常人的生活。系統(tǒng)的主要功能如下： 
1. 用戶可以通過眼睛注視屏幕上相應(yīng)的按鈕，實現(xiàn)輪椅動力系統(tǒng)的前進、左轉(zhuǎn)、右轉(zhuǎn)、停止等操作，從而實現(xiàn)自由“移動”；
2. 用戶可以通過眼睛注視相應(yīng)的音樂播放按鈕，啟動音頻播放器，享受美妙的音樂；
3. 用戶可以通過視線的移動和眼睛的眨動的，實現(xiàn)電子文檔或網(wǎng)頁的翻閱。
用戶只需通過短時間的適應(yīng)性訓(xùn)練即可掌握系統(tǒng)的操作，輕松自由地通過眼睛來控制整個系統(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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