基于双目视觉的导盲系统

A Guide System for Blind Based on Binocular Vision

针对于盲人安全行走不便的问题,设计了一个基于双目视觉快速识别与测距方法的导盲系统。双目视觉快速识别与测距方法是对双目图像进行形态学处理,通过轮廓提取算法对二值图像进行轮廓提取,借助左右轮廓图像中目标点的不同坐标值求取视差,根据双目测距原理计算出物体的空间距离信息。将该测距方法应用于导盲系统,该系统通过语音芯片将空间距离信息转为声音提示,盲人可以根据声音提示判断前方有无障碍物,从而进行障碍物的躲避。由实验结果可知,设计的导盲系统可以引导盲人安全行走,达到避物导盲的作用。

A guide system based on binocular vision is designed to solve the problem of blind people's walking inconvenience.Binocul-ar vision fast recognition and ranging method is based on morphological processing of binocular image,contour extraction algorithm for binocular im-age contour extraction,with the help of different coordinate values of the target points in the left and right contour images to obtain the parallax,and finally according to the binocular ranging principle to calculate the object space distance information.In this paper,the distance measurement method is applied to the guide system for the blind.The system converts the spatial distance information into the sound prompt through the voice chip,and the blind person can know whether there are obstacles ahead according to the sound prompt,so as to avoid the obstacles.