Transform human pose from camera_frame to Odom frame
I am using face_detector to detect human. I work quite well I can detect human and visualize on Rviz. However, I would like to know that is it possible to transform detected human position from...
View Articletf invalid argument
Hi, I'm trying to follow [this](https://github.com/ros-industrial/industrial_training/wiki/Coordinate-Transforms-using-TF) tutorial, and am running into an error. The error is [ERROR]...
View Articlewhat does this function in hector mapping mean?
Hi, all, I am learning the source code of [hector mapping](https://github.com/tu-darmstadt-ros-pkg/hector_slam). I have a question about a function in...
View ArticleCamera Pose Calibration
Is there an equivalent package to **camera pose calibration** in ROS Hydro? Finding the exact transform connecting the frame of a new camera to an existing robot's **tf** tree is almost impossible ...
View ArticleCan tf/tf2 resolve "hidden transforms" ?
Howdy folks, I have question relating to the following transform tree: **[/nav_frame]->[/base_link]->[/sensor_platform] -> [/IMU_AHRS]** The sensor platform is literally a platform that has...
View ArticleTransforming a pointcloud2 in python
I've searched and searched, but can't find a good answer to this. I'm using python so don't have access to `pcl_ros` (which seems deprecated anyway?) and other answers are all for older versions of ROS...
View ArticleHow to transform the whole /tf frame?
Given I have an occupancy grid map which I would want to transform with a certain [tx,ty,theta] transformation. How do I do it? The tf tree is posted below and also the rviz which contains the grid...
View Articlerobot_localization and gmapping - how the transform should be done?
We are trying to use `robot_localization` and `gmapping`. What we have done so far: we use gmapping to publish the transform between `map` -> `odom`. Then we tried to apply gps, imu and odom using...
View Articlehow to change the transform according to a transform tree
i have a bag file containing a transform tree and want to make a map from gmapping and hector slam. i want to know what all changes i have to make in the transforms in order to get the result..
View ArticleExtract robot position from rosbag
I recorded tf-messages (while driving the robot) into a bagfile and wrote a ros node that should extract the positions (base_link-frame) from that bag file. My idea was to use a tf::Transformer and...
View ArticleHow to remove a TF from a ROS bag?
I have a bag that contains a large TF tree where one TF (base_link->virtual_cam) was calculated based on several TFs and parameters. I would like to replay this bag without this generated TF in...
View Articletf2 Transform using FPD(NED like) frame return incorrect value
I have a underwater robot that we would like to use Forward, Port, Down orientation. I thought I could just create a link with flipped vertices. The urdf below displays correctly in rviz When I create...
View ArticleHow to join TF frames in RViz?
I am new to ROS and I am sure my question reflects this.. Thanks in advance for your time. I am using Ubuntu 14.04 on a Lenovo W530 laptop. I am running ROS indigo that I installed with `apt-get`. I...
View Articlenot getting map in gmapping transform from odom to base_link problem
i m using gmapping and i m not able to transform from odom to base_link. i have the odometry on wheel_odometry topic which has header frame id as "odom" and child frame id as "base_link" further i m...
View Articlebase_link to imu_link on Turtlebot 3
The Turtlebot3 firmware publishes a transform from base_link to imu_link. My understanding is that this transform is supposed to define where the IMU sensor is mounted relative to the robot's chassis...
View ArticleConfusing tf transforms
I have been working a lot with transform matrices these days and the tf nomenclature doesn't make things easier. For tf_echo, the input frames are defined as such: tf_echo When using Python and looking...
View ArticleRviz viewpoint transform
In the views panel on Rviz, I can see the transform of the viewpoint w.r.t. the fixed frame. Is there a way to get these values from outside Rviz (i.e. by another ROS node)?
View ArticleHow to transform the pose after map merge
Hi everyone! I am studying on cooperative simultaneous localization and mapping(C-SLAM). I found some tools like [Map Merger Tool](https://github.com/ahhda/Map-Merge-Tool) can help me to merge the maps...
View ArticleHow to reflect (or mirror) a point cloud in rviz ?
Hello, I have successfully set-up ros so that a point cloud is sent to rviz every 100ms. It looks great, however, the visualization is mirrored about the z-y axis. I have already tried using...
View Articletf: Adding a frame to transforms from the past
Hi everyone, I have a question regarding the usage of tf and hope someone can help me answer it. The problem setup is the following: Imaging I have a robot with defined base_frame and I send the robots...
View Article