Ar 2 kanoid augmented reality arkanoid
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AR 2 kanoid - Augmented Reality Arkanoid. Bax Smith, BSc, BEng, PhD Candidate Supervisor: Ray Gosine. Topics of Talk. What is Arkanoid? What is AR 2 kanoid? AR 2 kanoid Screenshots Component Overview of AR 2 kanoid Difficulties in Implementation Conclusions and Future Work.

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Ar 2 kanoid augmented reality arkanoid

AR2kanoid - Augmented Reality Arkanoid

Bax Smith, BSc, BEng, PhD Candidate

Supervisor: Ray Gosine


Topics of talk

Topics of Talk

  • What is Arkanoid?

  • What is AR2kanoid?

  • AR2kanoid Screenshots

  • Component Overview of AR2kanoid

  • Difficulties in Implementation

  • Conclusions and Future Work


What is arkanoid

What is Arkanoid?

  • Video game invented in 1986

  • AKA Breakout, Bricks


What is ar 2 kanoid

What is AR2kanoid?

  • Augmented Reality version of Arkanoid developed in 2002-2003


Ar 2 kanoid screenshot

AR2kanoid Screenshot


Ar 2 kanoid screenshot1

AR2kanoid Screenshot


Ar 2 kanoid screenshot2

AR2kanoid Screenshot


Ar 2 kanoid screenshot3

AR2kanoid Screenshot


Ar 2 kanoid screenshot4

AR2kanoid Screenshot


Component overview of ar 2 kanoid

Component Overview of AR2kanoid

Vision

Kalman

Filter

Render

Physics

Calibration

Sound

Joystick


Component overview of ar 2 kanoid calibration

Component Overview of AR2kanoid - Calibration

  • Mode 1 – Camera Calibration

    • Segment Circles from Several Images

    • Compute Lens Distortion Parameters

    • Save Calibration Parameters

  • Mode 2 – Apply Camera Calibration

    • Load Calibration parameters

    • Segment Circles from Image

    • Get the Position and Orientation of Surface from Circles


Difficulties in implementation

Difficulties in Implementation

  • Problem: Camera Distorts Image

  • Solution: Calibrate Camera


Component overview of ar 2 kanoid vision

Component Overview of AR2kanoid - Vision

  • Responsibilities

    • Interface to a camera

    • Initialization and Shutdown

    • Set the video format (FPS, Size, Color Encoding)

    • Resize Image using Bilinear Interpolation

    • Send Image to Calibration System

      • Returns Position and Orientation of Surface

  • Supports USB and Firewire Cameras


Difficulties in implementation1

Difficulties in Implementation

  • Problem: TOO MUCH DATA!!!!!!!!

    • Image Size: 640x480x3 = ~1MByte

    • 4 Rows x 5 Columns of Circles

      • Looked Real, Accurate Position Measurement

      • Very Slow ~1 Frames/second

      • CPU Intensive ~100%

  • Solution: Reduce Image Size and Number of Circles


Difficulties in implementation2

Difficulties in Implementation

  • Problem: Small Image Size, Less Circles

    • 160x120x3 = ~60KBytes

    • 2 Rows x 3 Columns of Circles

      • Fast ~30 Frames/second

      • Not CPU Intensive ~20%

      • Image Blockie, Noisy Position Measurement

  • Solution: Bilinear Interpolation & Kalman Filter

    • Better Image, Better Position Estimation


Component overview of ar2kanoid kalman filter

Component Overview of AR2kanoid – Kalman Filter

  • Used to Predict Position of Surface and Position of Camera

  • Simple Model

    • Distance = Velocity*Time


Component overview of ar 2 kanoid joystick

Component Overview of AR2kanoid - Joystick

  • Initialize Joystick using DirectX

    • Supports all Windows Joysticks

  • Get X-Y Position and Button Status

  • Shutdown Joystick


Component overview of ar 2 kanoid sound

Component Overview of AR2kanoid - Sound

  • Initialize Sound using DirectX

  • Load Sounds from Disk

  • Play Sounds when requested

    • Puck Hovering

    • Puck Colliding with a Wall or Paddle

    • Puck Colliding with a Brick

    • Puck Colliding with the Goal Line

  • Shutdown Sound


Component overview of ar 2 kanoid physics

Component Overview of AR2kanoid - Physics

  • Detect Puck Collision

    • Brick – Brick explodes, puck changes direction

    • Paddle – Puck changes direction

    • Side Walls – puck changes LR direction

    • Top Wall – puck changes UD direction

    • Goal Line – no. of pucks decrements, play resets

  • Get Joystick Status and Move Paddle

  • Move Puck

    • Puck Position,Velocity, Collision, Joystick


Component overview of ar 2 kanoid render

Component Overview of AR2kanoid - Render

  • Gets Puck and Paddle Position from Physics System

  • Gets Position and Orientation of Surface from Vision System

  • Gets Image from Vision System

  • Renders Scene on top of Image


Conclusion and future work

Conclusion and Future Work

  • Version 1 Completed!

  • Future Work

    • Better Memory Management/Optimizations

    • Better Position Extraction/Image Processing Algorithms

    • Better Model for the Kalman Filter

    • Better/More Detailed Graphics

    • Camera with wider FOV


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