Stereopsis method for visually impaired to identify obstacles based on distance

Identification of obstacles in the real time environment is idempotent for human blind to navigate freely without collision. This paper describes a methodology that is required to support the blind to discriminate obstacles based on their distance. The hardware part consists of a sunglass fitted with two mini cameras, laptop computer and stereo earphones. The two cameras capture the visual information infront of blind user. The captured images are then processed using the proposed methodology. The methodology includes image processing module, which isolate objects from the two camera images, and stereo vision module calculates distance through disparity. In the proposed algorithm disparity is obtained with less computation compared to conventional area based stereo correspondence method. Experimentations were conducted in indoor environment, and the results obtained are supportable.