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Building a Prototype of Tactile Vision Substitution System with High-Speed CMOS sensor 26July2006

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Building a Prototype of Tactile Vision Substitution System with High-Speed CMOS sensor 26July2006 . By: Arthur S. Agdeppa Jr. “We see with the brain, not the eyes” (Bach-y-Rita, 1972). There are 45 million blind people worldwide and growing. The cure for blindness still doesn’t exist

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Building a Prototype of Tactile Vision Substitution System with High-Speed CMOS sensor

26July2006

By: Arthur S. Agdeppa Jr

we see with the brain not the eyes bach y rita 1972
“We see with the brain, not the eyes”(Bach-y-Rita, 1972)
  • There are 45 million blind people worldwide and growing.
  • The cure for blindness still doesn’t exist
  • Paul Bach-y-Rita and Kurt A. Kaczmarek invented the Tactile Vision Substitution System
what is the tactile vision substitution system tvss
What is the Tactile Vision Substitution System (TVSS)?
  • A Sensory Substitution System.
  • Sends signal to one sense that is normally received by another
components of the tvss
Components of the TVSS?
  • CMOS active-pixel as the input device
  • Control box / circuit contains the receiver, multiplexer, clock, and switch.
  • Output device is an array of microelectrodes on flexible PCB
output resolution
Output Resolution
  • Capable of performing complex perception
    • facial recognition
    • accurate judgment of speed and direction of a moving object.
objectives of research
Objectives of Research
  • To explore the potential of a TVSS
    • By building and testing a prototype of the device using high-speed CMOS
  • Collision avoidance for blind people
    • By constantly sampling images at high rate (60 fps) and providing instant feedback
  • To provide real-time image sampling
    • By reducing time lag between input and output device
the prototype hardware
The Prototype Hardware
  • Input Device (COH-7200)
    • CMOS sensor
    • ½ “ monochrome
    • 659 x 494
    • 50 fps
    • D-cam compliant 8-bit output
    • IEEE-1394A output interface
prototype hardware continuation
Prototype Hardware: Continuation
  • Logic (Control Circuit)
    • Laptop Computer
    • Linux Operating System (Open Source)
    • Generic software
    • C language
  • Output Device
    • Light Emitting Diode Matrix
      • Prevent Injuries
      • Digital input
      • Consists of 8 x 8 LED
      • Serial Peripheral Interface
output pinout
Output Pinout
  • Pin 1 – 5 V power source
  • Pin 2 – Data I/O
  • Pin 3 – Chip Enable
  • Pin 4 – Clock
  • Pin 5 – 0 V power source
challenges
Challenges
  • Edge Detection Algorithm
    • Canny edge detection algorithm
  • Formula to scale down image
    • From 659 x 494 (input device) to 8 x 8 (output device)
  • Time
summary
Summary
  • Paul Bach-y-Rita and Kurt A. Kaczmarek invented TVSS since 1972
  • The prototype will have
    • COHU-7200
    • Linux box
    • LED array
  • The prototype will be used to explore the potential of TVSS device
my future agenda
My Future Agenda
  • Pursue Electronics and Computer Engineering Technology (ECET) in Maui Community College (MCC)
  • Be a part of Oceanit Ohana
acknowledgements
Acknowledgements
  • Oceanit

Curt Leonard

Leslie Bailey

Staff

  • CfAO

Malika Bell

Lisa Hunter

Hilary O’Bryan

  • MEDB

Isla Yap

  • MCC

Mark Hoffman

Wallette Pellegrino

references
References
  • www.who.int (World Health Organization)
  • www.wicab.com (Official Website of Brainport)
  • www.linux.org (Official Website of Linux)
  • http://www.tldp.org/HOWTO/libdc1394-HOWTO/concepts.html (libdc1394)
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