By: Arthur S' Agdeppa Jr

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By Arthur S. Agdeppa Jr
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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 doesnt exist
• Paul Bach-y-Rita and Kurt A. Kaczmarek invented
  the Tactile Vision Substitution System

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What is the Tactile Vision Substitution System
(TVSS)?

• A Sensory Substitution System.
• Sends signal to one sense that is normally
  received by another

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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
• 
  

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Output Resolution

• Capable of performing complex perception
• facial recognition
• accurate judgment of speed and direction of a
  moving object.

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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

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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

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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

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Linux IEEE1394
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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

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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

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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

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My Future Agenda

• Pursue Electronics and Computer Engineering
  Technology (ECET) in Maui Community College (MCC)
• Be a part of Oceanit Ohana

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Acknowledgements

• Oceanit
• Curt Leonard
• Leslie Bailey
• Staff
• CfAO
• Malika Bell
• Lisa Hunter
• Hilary OBryan
• MEDB
• Isla Yap
• MCC
• Mark Hoffman
• Wallette Pellegrino

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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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Questions ?