3DM: Quality Indicators

The Quality Indicators are a small on-screen display allowing you to quickly identify any problems with the fit area.

Quality Indicators appear at the top left of the liveview:

If you click on the dropdown it will expand the box:

Lighting

The lighting score is based on the exposure time, which is controlled by the camera. In simple terms, this indicates how long (in milliseconds) the Kinect camera kept the aperture open to capture enough light to make a good picture of the scene for each frame. We want this number to be as low as possible, to minimise motion blur in videos and still images - a score of 15 or better is preferred (this is the same number that appeared on the V1 traffic light).

Ideally you want the light to be evenly diffused, i.e. consistently spread in the space. Having bright spots on the rider or background doesn’t improve the score.

Framerate

The framerate indicates how many frames 3D Motion is able to take from the Kinect and process per second. If the lighting is poor the Kinect will automatically reduce the framerate from 30/31 (the maximum it can achieve) to 15/16.

Detection

Detection shows whether the system is consistently finding exactly 7 markers.

Troubleshooting

If you have a poor lighting score and low framerate: the best fix is usually to add a white background.  A dropdown projector screen can be an easy way of achieving this.

If you have a white background and still get a poor lighting score you may need to increase the light level in your fit space. We recommend LED lights of 1000-1500lumen (LED is the most efficient and coolest running form of bulb) with a colour temperature of 3000-6500K.

If you have good lighting (less than 15) but still poor framerate, your computer might be struggling to process the frames quickly enough. You may need to consider upgrading your computer. Note that when you first install 3D Motion, it may run more slowly the first time - Windows will be optimising in the background as it runs. So if you have a poor framerate the first time you run 3D Motion, leave it to run for 15 minutes and then restart to see if there is an improvement.

If you have poor detection, this could be due to the joint markers not being detected, or noise in the background. When 3D Motion can’t find exactly 7 joint markers, it will paint a red dot over the markers it did find. Watch the liveview, and try to observe whether one joint marker is not being picked up (i.e. has no red dot), and adjust the position of that marker to be visible to the camera. If you see many red dots in the background, you may need to reduce the reflections from those areas (3D Motion can cope with a certain amount of noise from the background, but will struggle if there are many reflections of a similar size to the joint markers)

If you have poor detection but all 7 joint markers are being found and there is little or no additional background reflection - your rider may have unusual body geometry or a riding position which triggers 3D Motion’s noise-reduction heuristics. Please submit a sample file (by clicking “Send a sample” and following the wizard) so that we can adjust heuristics in a future release.

If you have problems you can’t resolve, please contact us and we’ll help you resolve the issue.

See also

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