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Related Concept Videos

Masonry Paving01:21

Masonry Paving

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The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...
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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Related Experiment Video

Updated: Feb 14, 2026

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Real-Time Segmentation of Tactile Paving and Zebra Crossings for Visually Impaired Assistance Using Embedded Visual

Yiqiang Jiang1, Shicheng Yan2, Jianyang Liu1

  • 1School of Mechanical and Electrical Engineering, Yibin University, Yibin 644000, China.

Sensors (Basel, Switzerland)
|February 13, 2026
PubMed
Summary

This study introduces a lightweight AI model for visually impaired navigation, accurately identifying tactile paving and zebra crossings on an intelligent guide robot. The system enhances safety and mobility for the visually impaired using advanced computer vision on embedded platforms.

Keywords:
embedded platformlightweight modelsemantic segmentationvisual impairment assistance

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Area of Science:

  • Computer Vision
  • Artificial Intelligence
  • Robotics

Background:

  • Visually impaired individuals face significant safety and mobility challenges.
  • Existing assistive technologies often lack the precision and real-time performance required for effective navigation.
  • Accurate detection of crucial environmental cues like tactile paving and zebra crossings is vital for independent travel.

Purpose of the Study:

  • To develop a lightweight, high-precision semantic segmentation network for identifying tactile paving and zebra crossings.
  • To deploy this network on an intelligent guide robot for real-world application.
  • To enhance real-time performance and segmentation accuracy on resource-constrained embedded systems.

Main Methods:

  • Designed an improved G-GhostNet backbone for efficient feature extraction.
  • Integrated a depthwise separable convolution-based Coordinate Attention module.
  • Utilized a redesigned Atrous Spatial Pyramid Pooling (ASPP) module for multi-scale feature capture.
  • Employed a dedicated decoder for effective multi-level feature fusion.

Main Results:

  • Achieved 97% mPA and 94% mIoU for tactile paving segmentation.
  • Achieved 93% mPA and 86% mIoU for zebra crossing segmentation.
  • Reached an inference speed of 59.2 fps, outperforming mainstream semantic segmentation networks.

Conclusions:

  • The proposed semantic segmentation network demonstrates high accuracy and real-time performance for essential navigation aids.
  • The method is validated for practical use in embedded systems, significantly benefiting visually impaired individuals.
  • This research contributes to advancing assistive technology for enhanced mobility and safety.