Difference between revisions of "Tracking Tips and Tricks for Multiple PS Eye Cameras"

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=== Using Pose Mismatch ===
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''Pose Mismatch'' window is a very useful tool that allow you to understand how scene and actor settings affect tracking.
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* ''Pose Mismatch'' window is shown using ''View > Pose Mismatch'' menu item
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* ''Mismatch'' number at the top evaluates how actor model matches to video in the current frame
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* You need to run ''Refit Pose'' to match actor model to video before comparing ''Mismatch'' numbers
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* Lower value of ''Mismatch'' number means better match. So your need to minumize ''Mismatch'' number while choosing settings
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{{Note|If ''Mismatch'' number is negative, bigger absolute value means better match.}}
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[[Image:RGB-Cameras-Pose-Mismatch-1.png|thumb|600px|Pose Mimatch View]]

Revision as of 10:30, 27 July 2015

Tracking Tips and Tricks for Multiple PS Eye Cameras

Light Settings

Colors differ due to non-ambient lighting

Ideally, lighting should be ambient. In this case colors of clothes and body will look the same in all cameras, and you can leave default light settings.

But in real-life you can have non-uniform lighting, when most light comes from window, or bright light source. In this case colors will be darker in cameras directed towards this light source, and lighter in the rest of cameras. In this case adjusting light settings may substantially improve tracking.

You can find light settings at Scene tab.

  • Light source position is marked by yellow ball (1). Click and drag light control to orbit the light source (2). Approximate postions will be fine, you do not need to be very accurate.
  • You can also change light intensity (3). You can check how it influences tracking using View > Pose Mismatch window. Red Mismatch number shows the mismatch between tracked model and video in selected camera (4). If Mismatch number is lower, settings are better for selected camera.
Note.png
Note: If Mismatch number is negative, so lower value means bigger absolute value
RGB-Cameras-Light-Settings-1.png

Ground Height Fine-Tuning

Sometimes ground height detected during calibration may differ from the actual. This depends on particular flashlight you use for calibration, lighting conditions and other circumstances. Incorrect ground height may cause problems in feet tracking. Ground Height Fine-Tuning setting allows you to manually correct the ground height.

  • To make sure that the ground height is correct, you need to check if feet stand on the ground surface.
  • Run Refit Pose for T-pose frame and zoom / rotate the viewport to see the feet position clearly
    • If you see that feet are above the ground, detected ground is lower than actual
    • If you see that legs are bent a little, this may mean that detected ground is higher than actual
Tip.png
Tip: Legs bending may also be caused by incorrect height of actor. To check if ground height is correct, turn off Enable ground collisions on Scene tab, and run Refit Pose. If you see that feet are below the ground, detected ground is higher than actual.
  • Use Ground Height Fine-Tuning slider at Scene tab to change the ground height, and re-run Refit Pose to check the updated ground position.
Ground is below actual
Ground is above actual

Using Pose Mismatch

Pose Mismatch window is a very useful tool that allow you to understand how scene and actor settings affect tracking.

  • Pose Mismatch window is shown using View > Pose Mismatch menu item
  • Mismatch number at the top evaluates how actor model matches to video in the current frame
  • You need to run Refit Pose to match actor model to video before comparing Mismatch numbers
  • Lower value of Mismatch number means better match. So your need to minumize Mismatch number while choosing settings
Note.png
Note: If Mismatch number is negative, bigger absolute value means better match.
Pose Mimatch View