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Hello,

I can see cumulative effect of noise after 5-6 seconds. Could you help me with more information about the noise and how to deal with it?

Best Regards,
Riva Karia

Hi Riva,

Can you be a bit more specific about what activity you are trying to collect, and what you are seeing in the kinematics?

Hi Matt,

The tasks i am performing are Sit to stand and walking tasks. I have noticed that after a few seconds there is accumulation of noise and is visible in the graphs.

Best Regards,
Riva Karia

Hi Riva,

There could be several causes for what you are describing. If there is a specific session that demonstrates this you can pass it along to me.

But here are a few things:

-Camera sync - if you are doing cyclic movements like gait or sit-to-stand, the algorithm can sometimes have a hard time synchronizing the videos. You can start the trial with a hand punch over head to help the algorithm synchronize.
- Camera angles - If you are in a two camera setup, you want to have them as close to 45/45 to the participant as possible to get more 3D information. A purely frontal or sagittal camera can sometimes throw off the algorithm, especially when there are occlusions.
- FOV - Make sure your participants are clearly visible at all times. Sometimes if they are too small in the FOV, the pose estimation can have a hard time seeing specific body landmarks, adding to noise.

These tips and others are on the best practices page. For setting up your FOV, I would suggest watching the beginning of the tutorial video on that page.

Hope these help,