TUC-ProAut / libRSF

A robust sensor fusion library for online localization.
https://mytuc.org/libRSF
GNU General Public License v3.0
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Typo? factor graph based multiple object tracking papers. #16

Closed sshhj89 closed 1 month ago

sshhj89 commented 1 month ago

Hi.

I am very interested in your approach using GMM for resilience of object associations and thank you for your repository.

I would like to ask about the constant velocity factor in the paper "Optimization based 3D Multi-Object Tracking using Camera and Radar Data" and "Factor Graph based 3D Multi-Object Tracking in Point Clouds".

How can get the X_pos at time t+1 while constructing and optimizing the factor graph at time t and t-1.

image

Other error models for rotation and dimension uses constant value factor and its time periods are t and t-1.

Can you help me understand the constant velocity factor?

Sincerely, Hojun Son.

tipf commented 1 month ago

Hi Hojun, you are right. This must be a typo in equation (7). The constant velocity model is always applied between the current and the last position.

The code can be found here: https://github.com/TUC-ProAut/libRSF/blob/d54801a232af02c0cda6012dabd3dea6c5fd77c5/include/factors/ConstantDriftFactor.h#L63

Best Regards Tim