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

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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  1. Building a Prototype of Tactile Vision Substitution System with High-Speed CMOS sensor 26July2006 By: Arthur S. Agdeppa Jr

  2. “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

  3. What is the Tactile Vision Substitution System (TVSS)? • A Sensory Substitution System. • Sends signal to one sense that is normally received by another

  4. 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

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

  6. 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

  7. 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

  8. 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

  9. Linux IEEE1394

  10. 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

  11. 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

  12. 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

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

  14. Acknowledgements • Oceanit Curt Leonard Leslie Bailey Staff • CfAO Malika Bell Lisa Hunter Hilary O’Bryan • MEDB Isla Yap • MCC Mark Hoffman Wallette Pellegrino

  15. 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)

  16. …innovation through engineering and scientific excellence… since 1985 Questions ?

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