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

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By arthur s agdeppa jr

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


Linux ieee1394

Linux IEEE1394


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)


By arthur s agdeppa jr

…innovation through engineering and scientific excellence… since 1985

Questions ?


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