基于视觉跟踪技术的残疾人辅助系统

        本辅助系统是基于非接触式视觉跟踪技术构建的。系统首先利用摄像头采集眼睛角膜上反射的红外光源图像，然后根据屏幕四个边角的参考坐标和瞳孔中心的坐标计算出用户注视到屏幕上的位置；同时，系统通过图像处理的方法识别是否闭眼从而判断出用户的意图并执行相应操作。 

        本辅助系统是针对残疾人在行动上的缺陷而设计的，通过本辅助系统，残疾人可以获得行动上的自由；同时，本系统还为残疾人提供一定的娱乐功能，使残疾人能享受正常人的生活。系统的主要功能如下： 
1. 用户可以通过眼睛注视屏幕上相应的按钮，实现轮椅动力系统的前进、左转、右转、停止等操作，从而实现自由“移动”；
2. 用户可以通过眼睛注视相应的音乐播放按钮，启动音频播放器，享受美妙的音乐；
3. 用户可以通过视线的移动和眼睛的眨动的，实现电子文档或网页的翻阅。
用户只需通过短时间的适应性训练即可掌握系统的操作，轻松自由地通过眼睛来控制整个系统。

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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