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Thomas Swift

Thomas Swift. Week 11. Registration to field model. Complete!! Not perfect- slight tilt/rotation of field at times Possibly due to error in original registration Causes noise in OF, which is weeded out through thresholding. Original Video Frames. Registration wrt First Frame.

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Thomas Swift

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  1. Thomas Swift Week 11

  2. Registration to field model • Complete!! • Not perfect- slight tilt/rotation of field at times • Possibly due to error in original registration • Causes noise in OF, which is weeded out through thresholding

  3. Original Video Frames

  4. Registration wrt First Frame

  5. Registration wrt Field Model

  6. Manipulation of Optical Flow • Starting with OF obtained from registered frames, do the following: • Zero out flow from blackened regions (false flow) • Threshold real flow • Rotate flow so that flow of all plays run in same direction (direction determined manually) • Align scrimmage lines to center of field model (centers of scrimmage lines determined manually)

  7. Optical Flow- Original

  8. Optical Flow- Stage 1

  9. Optical Flow- Stage 2

  10. Optical Flow- Stage 3

  11. Optical Flow- Stage 4

  12. Results • Old registration (first frame) • From original OF: 11/23- 47.8% • Through stage 3: 13/23- 56.5% • Through stage 4a: 5/23- 21.7% • Through stage 4b: 8/23- 34.8% • New registration (field model) • From original OF: 7/23- 30.4% • Through stage 2: 5/23- 21.7% • Through stage 3: 4/23- 17.4% • Through stage 4: 3/23- 13.0%

  13. Current Work • Redoing the original first frame registration using COCOA • Appears to be better • If results are better, redo field model registration for plays which previously were poorly registered • Applying PCA to Aladdin dataset to make testing feasible

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