The innovation of this vision protector lies in relieving visual fatigue by using intelligent algorithm in computer vision instead of traditional ultrasonic ranging to measure the distance between users and books.
It solves all problems of existing vision protectors perfectly (advantages include: non-contacting, accurate, high fault tolerance, convenient).
The device appearance can be seen as follows. It contains a dual-camera, a LCD-screen and several buttons. It will give out a series of short beeps when it detects a possible unhealthy posture of reading (working, watching the screen or soon) and it will flash a LED to keep reminding users to adjust their postures.

The hardware architecture is as following.

The software architecture is as following.

• Linux ubuntu 14.04
• Python 3.54
• OpenCV 3.2
• Dlib 19.4

Copyright 2019, 2019 Han Liu
Contact: [email protected]

you can redistribute our method and/or modify
it under the terms of the MIT License as published 

our method is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
MIT License for more details.