Research Article
A Navigation System for the Visually Impaired: A Fusion of Vision and Depth Sensor
Table 1
Commonly used sensory aids for visually impaired persons.
| Sensor | Cost | Type | Usability |
| Guide dog | High | Genesis | Not easily available; needs carer | White cane | Low | Mechanical | Slow and can only find obstacles through touch | Ultrasonic sensor | High | Electronic machine | Signal reflection or absorption may result in false information | Camera | Low | Electronic machine | Needs proper installation | Infrared sensor | Low | Electronic machine | Can only be used for short distances | Laser | High | Electronic machine | Sensitive to sunlight | GPS | Low | Electronic machine | Can only be used in outdoors | Mobile robots | High | Electromechanical | Can only be used on plain and smooth surfaces |
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