Abstract
This paper demonstrate about the navigation for blind people using ultrasonic tester based on visual markers recognition and ultrasonic obstacles perception used as vibrator with RFID tag for acquiring required bus number detection for blind people. In this prototype, visual markers identify the points of interest in the environment additionally this location status is enriched with information obtained in real time. The RGB camera, ultrasonic sensor, vibrator, RFID Tag and cane enhancing the amount and quality of the available information. The user navigates freely in the prepared environment identifying the location markers. Based on the origin point information or the location point information using image processing the bus number is discerned. To raise the perception of the environment, avoiding possible obstacles, it uses three ultrasonic sensors with vibrator. The audio assistance provided to the user makes use of an audio bank, with simple known instructions to indicate precisely the desired route. Ten blind users tested and evaluated the system. The results showed rates of about 95.92% successful recognition of the markers using only 32 frames per second and 98.66% of ultrasonic obstacles perception disposed between 0.25 meters and 5.0 meters. By this technique blind as well as foreign people can reach the destination without any manual aid.
Keywords: - Navigation, Acoustics, Visualization, Cameras, RFID Tag, and ultrasonic sensor.
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