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Seeing through Events: Real-Time Moving Object Sonification for Visually Impaired People Using Event-Based Camera.

Zihao Ji1, Weijian Hu1, Ze Wang1

  • 1National Engineering Research Center of Optical Instrumentation, Zhejiang University, Hangzhou 310058, China.

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Summary

This study introduces a real-time sonification framework using event-based cameras to help visually impaired individuals (VIP) perceive moving objects. The novel approach enhances environmental awareness and auditory comfort compared to existing methods.

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computer vision for visually impaired peopleevent-based camerasonificationunsupervised object tracking

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Area of Science:

  • Computer Vision
  • Auditory Displays
  • Human-Computer Interaction

Background:

  • Scene sonification aids visually impaired people (VIP) in understanding surroundings.
  • Current methods often lead to information redundancy by processing entire scenes or static objects.
  • Biological vision prioritizes dynamic elements, aligning with event-based camera capabilities.

Purpose of the Study:

  • To develop a real-time sonification framework for VIP to perceive moving objects.
  • To overcome information redundancy in existing scene sonification techniques.
  • To leverage event-based cameras for enhanced environmental awareness.

Main Methods:

  • Utilizing an event-based camera to capture scene dynamics.
  • Clustering captured events into distinct moving objects without prior knowledge.
  • Implementing synchronous MIDI-based sonification for identified objects.

Main Results:

  • Experiments with visually impaired people (VIP) and sighted people (SP) demonstrated clear perception of object count, size, speed, and trajectory.
  • The proposed sonification method was found to be more aesthetically pleasing than existing approaches.
  • Successful real-time sonification of dynamic scene elements was achieved.

Conclusions:

  • The developed framework effectively enhances VIP's understanding of moving objects in their environment.
  • Event-based cameras and synchronous sonification offer a promising direction for assistive technologies.
  • The method provides a more comfortable and informative auditory experience for users.