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Mesut Altuntaş. Outline  What is the blindness?  Problems faced by blind people  Auxiliary tools to help blind people when they move  Conclusion 

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Presentation on theme: "Mesut Altuntaş. Outline  What is the blindness?  Problems faced by blind people  Auxiliary tools to help blind people when they move  Conclusion "— Presentation transcript:

1 Mesut Altuntaş

2 Outline  What is the blindness?  Problems faced by blind people  Auxiliary tools to help blind people when they move  Conclusion  Refence list

3 Problem of Blind People  Blindness is the condition of lacking visual perception due to physiological or neurological factors.  Physical disability of blind people make their life difficult.  Blind people have a problem of unsafe mobility.

4 Auxiliary tools to help blind people  Navigation System  Tactile Map  Braille  Blind Way  Eye Stick  Eye Ring  Sensory Substitution Device  Tacit Sonar

5 Navigation System  Device which contains navigation system is working with voice command.  Device describes the way to blind people

6 Navigation System  All GPS-based navigation systems for the blind consist of these functional components:  A module for determining the traveler’s position and orientation.  A Geographic Information System (GIS) comprising the system software and the spatial database for relating the traveler’s orientation.  GPS coordinates to surrounding environment and, the user Interface.

7 Navigation System  The first module of this system is concerned with determining the position and orientation of the traveler.  For positioning, Differential Global Positioning System (DGPS) is used to provides improved location accuracy.  For orientation sensing, fluxgate compass is used at tached either to the strap of the earthphones worn on the head or to the backpack carrying the rest of the equipment.

8 Navigation System  The second module of this system is the computer containing the GIS.  GIS system has a spatial database containing all buildings, roads walkways, bikeways, trees and other details.  Creating a reliable system, developing the database of the environment and developing the GIS software provides the traveler with the desired functionality.

9 Navigation System  The third module of this system is the user interface.  Spatialized sound from a virtual acoustic is used to convey information about the surronding environment to blind traveler.  Sound contains a given direction and distance.  As blind people move through the environment, they could hear the names of the buildings, and street intersections by speech synthesizer.

10 Tactile Map  Tactile map enables blind people to find their way.  Tactile maps are images that use raised surfaces so that a visually impaired person can feel them.

11 Tactile Map  To read a tactile map requires the user to use a systematic scanning technique.  Consider a sighted person trying to read a large wall map but only being able to read through two small holes; it is necessary to read the detail before being able to get an understanding of the whole image.

12 Tactile Map  Area of Usage 1. Emergency evacation tactile maps in buildings and facilities. 2. Wayfinding tactile maps and floor plans in public facilities and spaces. 3. Interpretation in museum, parks, tourist destinations and schools.

13 Tactile Map *Tactile map for emergency evacation

14 Braille  Braille is a series of raised dots that can be read with the fingers by people who are blind.

15 Braille  The system as devised by Braille consists of two parts 1. A character encoding for mapping characters of the letters in alphabet to tuples of six bits or dots. 2. A way of physically representing six-bit characters as raised dots in a braille cell.

16 Braille  Usage area of Braille Buildings with elevators have buttons with Braille markings ○ The blind can ride the elevator on their own without fear of accidentally goint to the wrong floor Announcement and instructions posted on walls of public places have Braille transcriptions. ○ Blind people travelling on their own can read them

17 Blind Way  Blind way helps blind people to find their way correctly.

18 Blind Way  Blind peole sense the way and move through this way to avoid crashing environmental stimuli.  It prevents injury of blind people.

19 Blind Way  A bad example of building blind way wrongly in Trabzon in Turkey.  Blind people crash wall when they follow this blind way.  It leads to injury.

20 Eye Stick  Eye Stick has a lens attached on the bottom part. It possible to recognize the special things, such as traffic lights, stair, subway.

21 Eye Stick  When blind people go into pedestrian crossing, the eye stick will recognize what is on the floor pattern and the color of the traffic light and it wil give information.  Each signal can be sent to them through vibrations.  They can avoid dangerous things as well as locate their destionation.  The blind people can recognize where they are through the Eye Stick.

22 Eye Ring  Small video camera is installed at the end of a finger. The device will translate the object image captured through the camera lens to the aural feedback to help people who have a vision problems.

23 Eye Ring  Eye Ring system can currently be used to identify currency, text, pricing information on tags, and colors.  The camera snaps a photo and sends it to a Bluetooth-linked smartphone.  A specially-developed Android app processes the image using computer-vision algorithms according to the preset mode selected by the user and uses a text-to- speech module to announce the appropriate results through earphones plugged into the smartphone.

24 Sensory Substitution Device  Sensory Substitution Device enables blind people in effect to see and even describe objects.

25 Sensory Substitution Device  This Sensory Substitution Device uses the camera to gather visual data and then uses a rather nifty computer algorithm to translates this data into sound.  SSDs are non-invasive sensory aids that provide visual information to the blind via their existing senses.  With 70 hours of unique training paradigm, blind users can identify complex objects, and even read words.

26 Tacit Sonar  Tacit sonar is a glove like accessory that can help blind and visually impaired people navigate without bumping into obstacles.

27 Tacit Sonar  It is designed to help a vision impaired person to navigate complex environments.  It is wrist mounted and senses objects from about 1 inch (2 cm) to 10 feet (3.5m).  It has generally fast response time to quickly navigate complex environments.

28 Conclusion  Blind people have a serious problem when they move.  Technological developments remove and reduce handicape of blind people.  Technological equipments allow blind people to move more securely.

29 References  Eye Catch Signs (2008). Tactile Maps – the ideal solution for public facilities. Retrieved December 15, 2012, from me/accessibilitysignage/braillianttouc h/tactilemaps/default.aspx  Labs, G. (2011). Meet the tacit project. Retrieved December 19, 2012, from tacit-project-its-sonar-for-the-blind

30 References  Loomis, J. M., Golledge, R. G. & Klatzky, R. L. (1998). Navigation System for the blind. Presence, 4(2), Retrieved December 12, 2012, from obwear/resources/loomis-presence98.pdf  Milliyet (2012). Görme Engellilere “fıkra gibi” yürüyüş yolu. Retrieved December 18, 2012, from engellilere-fikra-gibi-yuruyus- yolu/gundem/gundemdetay/ / /default.htm

31 References  Ridden, P. (2012). Camera-toting EyeRing could help blind people to “see” objects. Retrieved December 21, 2012, from recognition-aural-feedback-mit/23677/  Song, W. (2009). Blind Stick with Eyes. Retrieved December 17, 2012, from /08/blind-stick-with-eyes/

32 References  Tiresias (2009). Tactile Maps. Retrieved December 20, 2012, from ctile_maps.htm  Wilkins, A. (2012). New device hacks into blind people’s visual cortex to let t hem “see”. Retrieved December, 10, 2012, from substitution-device/

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