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SENIOR DESIGN PROJECTS Design Review. Eye Tracking System Optimization Zachary Harvey Piyush Agarwal Robert Laiacona Lowren Lawson. Presentation Overview. Project Overview Zachary Harvey Typical Operation / Sensors Rob Laiacona System Overview Lowren Lawson

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senior design projects design review

SENIOR DESIGN PROJECTSDesign Review

Eye Tracking System Optimization

Zachary Harvey

Piyush Agarwal

Robert Laiacona

Lowren Lawson

presentation overview
Presentation Overview
  • Project Overview
    • Zachary Harvey
  • Typical Operation / Sensors
    • Rob Laiacona
  • System Overview
    • Lowren Lawson
  • TI Divinci DM355 / Possible Problems
    • Piyush Agarwal
  • Prior Work / Power Requirements
    • Lowren Lawson
  • Multidisciplinary Components / Societal Impact / Power requirements
    • Zachary Harvey
  • Testing / System Integration/Alternatives/Costs
    • Rob Laiacona
existing system
EXISTING SYSTEM

PC53XS scene camera

PC206XP eye camera

IR LED

http://www.cis.rit.edu/pelz/publications/ETRA04_babcock_pelz.pdf

problems with the existing system
PROBLEMS WITH THE EXISTING SYSTEM
  • Video Synchronization
  • Video Cutout
  • Data Processing
    • New Eye Tracking Algorithm
  • Power Management
  • Monitoring
  • Too Bulky
  • Offline analysis restriction
customer wants
CUSTOMER WANTS
  • Basic Level
    • Synchronized 30 FPS video
    • LCD screen display
    • Four hour video storage
    • Simple Interface
    • 8 hours storage / battery
  • More Advanced Features
    • Control Wirelessly
    • Storage via H.264
    • Video multiplexing
typical operation
Typical Operation
  • Subjects are taken outdoors / indoors in daylight
  • Operation in fair weather
  • Subjects are instructed to hike and climb
sensors
Sensors
  • Cameras
    • CMOS
    • Analog NTSC encoded video stream
    • ~30 FPS to capture all eye movement

PC53XS scene camera

PC206XP eye camera

IR LED

system startup
System Startup
  • Startup Self Test
    • Determine number of cameras
    • Determine battery power
    • Storage Space
    • LCD test
  • Enter standby mode
  • Wait for input
leopard board
Leopard Board
  • TI DM355
    • MPEG4 Coprocessor
    • Arm GPP (270 MHz)
  • TI DM365
    • MPEG4 / H.264
problems
Problems
  • Leopard Board interfacing
  • Processing Expense
  • Packaging
problems leopard board interface
Problems (Leopard Board Interface)
  • Digitizing two video streams
    • Breakout board needed
  • Getting drivers to work properly
  • Power consumption
  • Mitigation
      • Switching platforms to a more powerful SBC
problems processing expense
Problems (Processing Expense)
  • MPEG4 / H.264 video compression is computationally expensive
  • Hardware capable of processing is expensive
    • SBC solution ~500 - 1000$
  • Mitigation
    • Leopard Board (~100$)
      • Limited to one stream / MPEG4
problems packaging
Problems (Packaging)
  • System must be durable
    • Subjects are told to climb / hike outdoors
    • Connections must be secure
  • System must be low power
    • System runs off of 7.2V 4000 mAH battery
  • Heat dissipation
  • Mitigation
    • Locking connectors
    • Low power parts
    • Enclosure
prior work
PRIOR WORK
  • Applied Science Laboratory EYE TRAC
    • Expensive
  • openEye Open Source
    • Poor recording capabilities
  • RIT Multidisciplinary Project
    • Poor software implementation
      • Windows XP + Lab View
    • More research needs to be done on what went wrong
  • NASA eye tracking device
    • Works specifically with their equipment
    • Not commercially available
power requirements
Power Requirements
  • User would like 4-8 hours of operation
    • Using 7.2 4000 mAH battery
  • Leopard board will last 4-5 hours
multidisciplinary components
Multidisciplinary Components
  • Electrical Engineering
    • Power consumption
  • Imaging Science
  • Computer Science
  • Packaging Science
societal impact
SOCIETAL IMPACT
  • Visual Perception Research
  • Commercial Advertising
  • Medical Research
  • Academic Strategies
testing procedure
Testing Procedure
  • Video Stream Testing
  • Power Consumption Testing
  • Regression Testing
  • Interface testing
system integration
System Integration
  • Initially VGA camera module will be used for input
  • Data will be recorded to SD card
  • Once Video can be acquired, the NTSC streams will be used
alternative approaches
Alternative Approaches
  • SBC
    • Easy but expensive
  • Reverse engineer existing video capture device
  • Fully Custom Platform
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