Obstacles Detection Technique for Visually Impaired

Abstract

World Health Organization (WHO) has estimated that there are about 45 million visually handicapped people worldwide. These visually impaired people experience serious difficulties in leading an independent life due to reduced perception of the environment. Most of them confront serious difficulties in mobility and navigation, when they find themselves in new, unknown environment. The visually impaired people greatly rely on vision aids to perform their daily activities. In this paper, we have discussed in detail all the design issues involved in the development of stereo vision based navigation technique for the blind people.  In this paper, we have described a technique that automatically detects obstacles and help the blind user in navigation. The developed technique makes use of calibrated stereo cameras to acquire stereo images of an object from nearby viewpoints. The acquired stereo images are rectified to ease the stereo correspondence problem, which is computationally hard