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mack-raymond / Exploring-Data-Acquisition-with-Android-Devices-and-Python

Analytics Vidhya data science article
https://medium.com/@draymo/exploring-data-acquisition-and-trajectory-tracking-with-android-devices-and-python-9fdef38f25ee
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Trajectory Tracking for walking #1

Open ogreyesp opened 4 years ago

ogreyesp commented 4 years ago

Hello

I'm very interesting in your work. I have reproduced your example without any problem.

I would like to apply your code to track the trajectory of a user that walks a circuit (square circuit) holding the phone in the right front pocket. I have tried to do this but the plotted trajectory is completely wrong. Could you provide an example of tracking trajectory for walking activity?

I would appreciate any help on this.

Thanks in advance.

Oscar

mack-raymond commented 4 years ago

Hi Oscar,

Thanks for reaching out. I'm happy that my tutorial has been of interest to you!

I've had some success in tracking the phone trajectory when it was in a pocket previously, but it's a difficult problem because of the amount of noise picked up by the accelerometer even when it's filtered. It really requires more advanced IMU estimation algorithms, especially if the motion lasts more than a few seconds. Generally, any motion longer than 5 seconds will require more sensors than just an accelerometer to track it. This is where the field of sensor fusion takes off.

Unfortunately, I'm a bit short on time to focus on these types of problems now. However, seeing that others have found use in this tutorial for their own projects, I would be interested in writing a follow-up tutorial with more examples in the future. I'll be sure to give you an update then.

Good luck!

On Wed, Sep 2, 2020, 12:13 AM Oscar Gabriel Reyes Pupo < notifications@github.com> wrote:

Hello

I'm very interesting in your work. I have reproduced your example without any problem.

I would like to apply your code to track the trajectory of a user that walks a circuit (square circuit) holding the phone in the right front pocket. I have tried to do this but the plotted trajectory is completely wrong. Could you provide an example of tracking trajectory for walking activity?

I would appreciate any help on this.

Thanks in advance.

Oscar

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