Feature 2: Background subtraction

[ElliotAOram]

Feature Description

This feature will remove the background from the videofeed to ensure that there is a black background for the hologram and only the foreground is of interest.

Tasks

• Entry tasks:
  • Spike work into how to perform background subtraction
• Design feature:
  • [ ] Consult overall model and decide if change is required
  • [ ] correct method stub for background subtraction in VideoProcessor
• Build by feature:
  • [ ] Write tests for feature
  • [ ] Write code to pass tests
  • [ ] Refactor where required

[ElliotAOram]

simple background subtraction (videofeed - static background image) produces okay results and may be sufficient for a controlled environment (such as the one used for the demo). However in order to get better colour and more consistent results it would be possible to use a MOG method but this would rely on almost constant motion and could be far more complex than required for the scenario.

I think I shall discuss this with my supervisor as it will change whether the emphasis is put on the software or the staging area.

[ElliotAOram]

Things to add in to design:

• [ ] Use image or take new one (possibly in the constructor)
• [ ] Functionality to take new image for background - ensure there is delay to account for camera focus and light bleed
• [ ] Process background image (scale and crop)
• [ ] np.subtract(stream, background) in loop

[ElliotAOram]

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