Visual Impairment And Blindness Essay

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Visual impairment and blindness caused by various diseases has been hugely reduced, but there are many people who are at risk of age-related visual impairment. Visual information is most important for any navigational tasks, so visually impaired people are at disadvantage because necessary information about the surrounding environment is not available. With the wide development in inclusive technology it is possible to extend the support given to people with visual impairment during their mobility. In this context we propose a system, named Smart Vision, whose objective is to give blind users the ability to move around in unfamiliar environment, whether indoor or outdoor, through a user friendly interface. This paper is concerned mainly in …show more content…

Our paper focuses on obstacle detection, and finding location in order to enhance navigation facilities for visually impaired people. Moving through an unknown environment becomes a real challenge when we can’t rely on our own eyes. Since dynamic obstacles usually produce noise while moving, blind people develop their sense of hearing to detect them. this can also be applied to different situation. When the visually-impaired move into a new environment, they will find it difficult to memorize the locations of the object or obstacles. As usage of various sensors for obstacle detection are being done but if we use the camera and image processing technique for obstacle detection it is more reliable and gives much more depth knowledge of the obstacle. Also usage of this technology makes the hardware part less bulky as compared to the hardware by using the sensors. Mainly ultrasonic sensors are used for obstacle detection which is best choice when we use sensors for obstacle detection. Image processing gives the in-depth knowledge. We can get to know the distance of obstacle and also the shape of the obstacle by using either region based or shape based processing. Using the image processing in support with LPC 2148 as the processor makes this system on par with other obstacle detection system as it enhances the processing speed. Also, using various modules makes the system much more user …show more content…

take a case as one variable is already known (for example, a ship or plane may have known elevation),then the receiver can determine its position using only three satellites.sometimes Some of the GPS receivers may use additional clues or assumptions (such as reusing the last known altitude, inertial navigation, or including information from the vehicle computer) to give a degraded position when fewer than four satellites are visible.

RFID
RFID is a method of remotely storing and retrieving data using devices called RFID tags. An RFID tag is a small object, such as an adhesive sticker, that can be attached to or incorporated into a product. RFID tags contain antennae to enable them to receive and respond to radio-frequency queries from an RFID transceiver.
It offers very high security. Each tag is identified by a Unique Identification Number (UIN), which can be either factory or manually programmed and then password protected. The excellence of this tag is that the data on the chip that uses sophisticated algorithm techniques cannot be duplicated or manipulated. Hence making it the perfect tool for Secure Access

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