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Virtual Me

Virtual Me. Motion Capture. The process of recording movement and translating that movement onto a digital model Games Fast Animation Movies Bio Medical Analysis VR. Types of Tracking. Facial tracking Full body tracking Hand tracking Partial body tracking. 1- Mechanical Motion Capture.

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Virtual Me

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  1. Virtual Me

  2. Motion Capture • The process of recording movement and translating that movement onto a digital model • Games • Fast Animation • Movies • Bio Medical Analysis • VR

  3. Types of Tracking • Facial tracking • Full body tracking • Hand tracking • Partial body tracking

  4. 1- Mechanical Motion Capture • Using an exoskeleton • Each joint is connected to an angular encoder • The value of movement of each encoder is recorded by a computer • Pros: • Not being influenced by external factors • Cons: • Freedom of movement is limited •  Absolute positions are not known

  5. 2- Magnetic Motion Capture • Magnetic sensors and a magnetic field generator • Detect sensor position based on field strength • Pros: • Data captured is accurate • Cons: • External disruptions by electrical/magnetic fields by other devices

  6. 3- Optical Motion Capture • Using Markers (Reflective or Emitting) • Uses light intensity to determine marker position • Pros: • Free movement • Very clean and detailed data(?????) • Cons: • Reflective dots can be blocked, causing loss of data • Rotations of body parts are not absolute and must be solved for(????)

  7. 4- Marker less Tracking • Using computer vision • Detect Humans in the picture • Uses techniques to extract motion information from the image • Silhouette detection • Joint detection

  8. Market Survey

  9. PhaseSpace <search impulse> • 4:24 Impulse cams • 20:100 impulse active LED • Price:$29,950.00 to $123,950.00 • feature: full body motion tracking (including fingers using gloves)

  10. Nintendo Wii • Accelerometer , Optical sensors<search> • Gaming System • Price:$199 • Limitations: • Can only track the motion of the hand • Only useable with the Wii

  11. Sony PS3 Eye • Web Cam • price: cam:$34.99  , playstation 3:$299.00 • feature: recognizes hand and body movements • Limitations: • Officially Works only with Sony PS3 • Low resolution 640x480

  12. The Virtual Me Approach • A frame work for Human motion capture • Color based markers • Arbitrary number of cams • Detect major limbs motion and orientation • Hopefully real time

  13. Sample application • A simple game will be used as a demonstration • Virtual Goal • The player will defend his goal from multiple footballs

  14. System Design

  15. Body Constructor Constraint module History Merging Module Capture Marker Detector Image Processing Pipelines IPP(1) IPP(2) IPP(K) Camera Interface

  16. Capture rate Adjustment

  17. Time Plan (Plan carefully)

  18. Time Plan 2

  19. Development • Language • C++ • Tools • Visual Studio 2008 • Open CV 2.0

  20. Questions

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