Senior design projects design review
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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


Typical data

Typical Data


System startup

System Startup

  • Startup Self Test

    • Determine number of cameras

    • Determine battery power

    • Storage Space

    • LCD test

  • Enter standby mode

  • Wait for input


User interface

User Interface


High level system design

HIGH LEVEL SYSTEM DESIGN


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


Cost estimates

COST ESTIMATES


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