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Stereo Vision Based Sensory Substitution for the Visually Impaired
Simona Caraiman1, Otilia Zvoristeanu2, Adrian Burlacu3
1Faculty of Automatic Control and Computer Engineering,"Gheorghe Asachi" Technical University of Iasi, D. Mangeron 27, 700050 Iasi, Romania. sarustei@cs.tuiasi.ro.
Sensors (Basel, Switzerland)
|June 23, 2019
Summary
This study presents a wearable stereo vision system for visually impaired individuals, enabling real-time environmental perception and navigation outdoors. The Sound of Vision (SoV) system reconstructs scenes, offering audio-visual feedback for enhanced mobility.
Area of Science:
- Computer Vision
- Human-Computer Interaction
- Assistive Technology
Background:
- Visually impaired individuals face challenges in environmental perception and navigation.
- Existing sensory substitution devices (SSDs) and electronic travel aids have limitations in wearability, real-time operation, and cost.
- The Sound of Vision (SoV) project aims to overcome these limitations with a comprehensive approach.
Purpose of the Study:
- To present the artificial vision component of the SoV SSD for outdoor scene reconstruction and segmentation.
- To develop a real-time, reliable stereo vision method for wearable devices in complex outdoor environments.
- To evaluate the system's performance and usability with visually impaired users.
Main Methods:
- Utilized stereo vision for depth perception and scene analysis in outdoor settings.
- Designed a method to handle unreliable depth input and complex head-worn camera motion (6 Degrees of Freedom).
- Developed a custom benchmarking dataset for quantitative evaluation.
Main Results:
- The stereo-based method provides real-time scene descriptions despite challenging conditions.
- Quantitative evaluation on a custom dataset demonstrates the system's effectiveness.
- Usability evaluation with visually impaired users yielded positive highlights.
Conclusions:
- The SoV artificial vision component offers a viable solution for outdoor environmental perception for the visually impaired.
- The developed stereo vision approach is robust and suitable for wearable assistive devices.
- Further development and integration of SoV SSDs can significantly improve the independence and mobility of visually impaired individuals.
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