On ontology-based indoor navigation for the visually impaired
Fedor Tiršel


My study – the field of interest
lAssoc. Prof. Kopecek
lsocial informatics
ldialogue systems
l
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Motivation
leasy to implement solution for owners of buildings
lfinding accurate and reliable user location
lavoid the trial and error process
lupgrade user’s familiarity with an unknown environment
lunique requirements on a navigation system for blind or visually impaired users
l
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Requirements I
lroute planning and management (save, edit, share)
ladaptive start to end route following
laccurate relative and absolute progress feedback
lup to date hazard warning and avoidance guidance
lgeneral environment information
l
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Requirements II
lnon-blocking of other senses (headphones)
lvoice navigation on demand
lgraduated levels of functionality (novice → expert)
lemergency request for assistance
l
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Concept
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Ideas
ladoption of smart phones as “the device”
labsence of assistive tools for navigation (e.g. the long cane, guide dogs)
lQR codes for fully sighted, “wireless” for blind
lrouting in ontology-based maps
ladvanced interaction based on dialogue
lwhat-where where-what language
l
l
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Ontology I
lDef: a logical theory which gives explicit, partial account of a conceptualization
l
lDef: an intensional semantic structure which encodes the implicit rules constraining the structure
of a piece of reality
l
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Ontology II
lcombine different kinds of ontological knowledge
l
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Special canes – Ven ze tmy
ldetection based on stereo and 3D cameras
lacoustics signals overlays natural sound of the surroundings
linformation is primary send
l    to the body skin
linformation about locale                               obstacles in front of
whole                                 user body
lrepresentation of depth map
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Special canes – RF Guide
lconcept of intelligent buildings
lroutes are marked by RFID and magnetic beacons
lcheap and available solution
l“You are at the second floor. There is door number 210 three meters behind you. Watch: on both
sides of the corridor are benches.”
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Summary
lto provide assistance on demand
lup to date hazards identification and level based warnings
lsharing of knowledge
lindependency of visually impaired user
lto build ontology-based maps
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