ZikangYuan / liw_oam

[IROS 2023] A LiDAR-inertial-wheel odometry and mapping system based on BA framework.
GNU General Public License v2.0
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ground_truth #13

Closed Liming-Cheng closed 2 months ago

Liming-Cheng commented 5 months ago

作者您好,想咨询下关于nclt ground truth的问题:

  1. readme中提供的下载链接内,获取到的nclt.txt是乱码,kaist.txt ok;
  2. 读取了ground_truth.csv之后发现外参有问题,请教下如何将groundtruth转到bag中已经做过处理的imu系下,有点疑惑。
  3. 可以麻烦您check下上传的nclt ground truth吗?感谢!
ZikangYuan commented 2 months ago

您好,nclt的GT已重新上传。至于外参转换问题,假设GT到IMU的外参变换是T_ig,对于任意时刻gt坐标系下的pose T_cur_g,只需要通过T_cut_i = T_ig T_cur_g T_ig.transpose() 就能将GT的pose从GT坐标系转到IMU坐标系。