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AR 2 kanoid - Augmented Reality Arkanoid

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 What is Arkanoid?

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AR 2 kanoid - Augmented Reality Arkanoid

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  1. AR2kanoid - Augmented Reality Arkanoid Bax Smith, BSc, BEng, PhD Candidate Supervisor: Ray Gosine

  2. Topics of Talk • What is Arkanoid? • What is AR2kanoid? • AR2kanoid Screenshots • Component Overview of AR2kanoid • Difficulties in Implementation • Conclusions and Future Work

  3. What is Arkanoid? • Video game invented in 1986 • AKA Breakout, Bricks

  4. What is AR2kanoid? • Augmented Reality version of Arkanoid developed in 2002-2003

  5. AR2kanoid Screenshot

  6. AR2kanoid Screenshot

  7. AR2kanoid Screenshot

  8. AR2kanoid Screenshot

  9. AR2kanoid Screenshot

  10. Component Overview of AR2kanoid Vision Kalman Filter Render Physics Calibration Sound Joystick

  11. 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

  12. Difficulties in Implementation • Problem: Camera Distorts Image • Solution: Calibrate Camera

  13. 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

  14. 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

  15. 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

  16. Component Overview of AR2kanoid – Kalman Filter • Used to Predict Position of Surface and Position of Camera • Simple Model • Distance = Velocity*Time

  17. Component Overview of AR2kanoid - Joystick • Initialize Joystick using DirectX • Supports all Windows Joysticks • Get X-Y Position and Button Status • Shutdown Joystick

  18. 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

  19. 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

  20. 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

  21. 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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