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Related Experiment Video

Updated: May 14, 2026

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation
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Time-to-contact maps for navigation with a low resolution visual prosthesis.

Chris McCarthy1, Nick Barnes

  • 1NICTA Canberra Research Laboratory, Canberra ACT, Australia.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|February 1, 2013
PubMed
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This study introduces a new visual representation for prosthetic vision, using time-to-contact (τ) to improve the detection of moving objects. This method aids earlier collision perception and better distinguishes moving objects from the background.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Computer Vision

Background:

  • Prosthetic vision technologies face challenges with limited resolution and dynamic range, hindering the perception of moving objects.
  • Current visual representations for artificial vision often rely on intensity or depth, which may not optimally convey motion information.

Purpose of the Study:

  • To develop and evaluate a novel, biologically-inspired visual representation for prosthetic vision systems.
  • To enhance the perception of independently moving objects, particularly those posing a collision risk, for individuals with visual impairments.

Main Methods:

  • Proposed a new visual representation based on the recovery of time-to-contact (τ) with scene surfaces.
  • This representation directly encodes the rate of approach, prioritizing objects with imminent collision potential.

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Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind
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Related Experiment Videos

Last Updated: May 14, 2026

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation
10:25

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation

Published on: September 2, 2025

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind
09:01

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

Published on: March 27, 2013

  • Compared the τ-based representation against traditional intensity and depth-based representations.

    • Main Results:

    • The τ-based representation facilitated earlier perception of incoming objects compared to intensity and depth-based methods.
    • Demonstrated clearer distinction between moving objects and static scene elements using the proposed representation.
    • Highlighted the potential of τ-encoding for improving dynamic scene understanding in prosthetic vision.

    Conclusions:

    • A time-to-contact (τ)-based visual representation shows promise for improving prosthetic vision capabilities.
    • This biologically-inspired approach may enhance safety and environmental awareness for users of retinal prostheses.
    • Further research into τ-based representations could lead to more effective artificial vision systems.