A mobile visual navigation device: New algorithms for crosswalk and pictogram recognition

Karacs, Kristóf; Radvanyi, Mihaly; Görög, Márton; Kusnyerik, Ákos; Roska, Tamás

doi:10.1109/isabel.2009.5373630

Cited by 3 publications

(1 citation statement)

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“…As discussed in earlier subsections, the placement of markers/sensors in the infrastructure is costly and requires a lot of maintenance. Given this fact, many assistive systems nowadays try to give the user information about the presence and orientation of natural objects in the scene, such as crosswalks [79][80][81]or text commonly found in places like Buses or office doors [82,83,48]. Even the distinction between similar objects used in everyday life that may be easily confused by blind users, like different bank notes [84], food or medicine containers [85], can be incorporated in spatial orientation systems which use advanced computer vision techniques to provide spatial awareness through the recognition of natural objects.…”

Section: Spatial Orientationmentioning

confidence: 99%

A review of assistive spatial orientation and navigation technologies for the visually impaired

Fernandes

Costa

Filipe

et al. 2017

Univ Access Inf Soc

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Purpose-The overall objective of this work is to review the assistive technologies that have been proposed by researchers in recent years to address the limitations in user mobility posed by visual impairment. Method-This work presents an "umbrella review". Results-Visually impaired people often want more than just information about their location and often need to relate their current location to the features existing in the surrounding environment. Extensive research has been dedicated into building assistive systems. Assistive systems for human navigation, in general, aim to allow their users to safely and efficiently navigate in unfamiliar environments by dynamically planning the path based on the user's location, respecting the constraints posed by their special needs. Conclusions-Modern mobile assistive technologies are becoming more discrete and include a wide range of mobile computerized devices, including ubiquitous technologies like mobile phones. Technology can be used to determine the user's location, his relation to the surroundings (context), generate navigation instructions and deliver all this information to the blind user.

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