Review on Strategies for Visually Impaired People

Abstract: Vision is the most important part of human life. The proposed paper refers to a systems that are capable to assist or guide people with vision loss, ranging from partially sighted to totally blind, by means of sound commands. Many technologies are working on implementation of smart eye for visually impaired people in different ways like voice based assistance, ultrasonic based assistance ,camera assistance and some researchers are trying to give transplantation of real eyes with robotic eyes which can capable enough to plot the real image over patient retina using some biomedical technologies. Creating a combined system of sensing technology and voice based guidance system which could give better result than individual technology by the use of microcontroller. There are some limitation in system like obstacle detection which could not see the object but detection the object and camera based system can�t work properly in different light level so the proposed system is a fusion of colour sensing sensor and the Obstacle sensor(ultrasonic sensor)as well as GPS Navigation along with the voice based assistance system. . These system does not requires a huge device to be hold for a long distance and it also does not requires any special training. This system also gives time timing through voice feedback. The main idea of the proposed system to make person aware of path he is walking and also the obstacle in the path.

Keywords: Navigation system; visually impaired; obstacle detection; microcontroller.