Hello,
I would like to ask the difference between a state estimator like `robot_localization`, or `robot_pose_ekf` and a localization package like `amcl`.
Can we say, a state estimator estimating (x, y, z, roll, pitch, yaw, and their respective velocities) is more general
than a localization module which only estimates (x, y, z, roll, pitch, yaw)
Other than the fact that, `robot_localization`, or `robot_pose_ekf` are fusing odometry data from different sensors and amcl is using this data plus laser/camera data to localize the robot, and (x, y, z) in state estimators are relative to the initial position and global (relative to the map) in `amcl`
Thanks
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