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Related Concept Videos

What is a Sensory System?01:31

What is a Sensory System?

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Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
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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.

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Summary
This summary is machine-generated.

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.

Keywords:
3D reconstructionobstacle detectionsensory substitutionstereo visionvisual impairment

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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.