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

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Presentation on theme: "Motion Capture The process of recording movement and translating that movement onto a digital model Games Fast Animation Movies Bio Medical Analysis VR."— Presentation transcript:

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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 4:24 Impulse cams 20:100 impulse active LED Price:$29, to $123, feature: full body motion tracking (including fingers using gloves)

10 Nintendo Wii Accelerometer, Optical sensors 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:$34.99, playstation 3:$ 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 Image Processing Pipelines IPP(1 ) IPP(2 ) IPP( K) Marker Detector Merging Module Constraint module History Body Constructor Camera Interface Capture

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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