problem with gmapping
Hi, everyone I am using gmapping to build a map for an office room with a hokuyo laserscanner(UTM-30LX-EW), following the tutorial MappingFromLoggedData. The map I got seems incorrect, as shown below....
View Articlehow to broadcast a tf frame?
Hello, I have a tf frame named /base_link which is part of the turtlebot 2. I am trying to take the information that the /base_link frame contains such as its position(xyz) and its orientation(rpy)...
View Articlear_tag_alvar frame not found
Dear ROS users, I'm using ar_tag_alvar, starting from example launch file already in the package. When launching, I get *Frame id / does not exist!*, despite I set in the launch file. Thank you very much!
View ArticleTF Lookup would require extrapolation into the future
I would appreciate some guidance to understand what may be going on here. I am trying to use the very nice robot_localization package to integrate GPS, IMU, Optical Flow and a few other sensors to...
View ArticleRGBDSLAM - Slow transform publishing
Hi there, I have the RGBD SLAM v2 package (http://felixendres.github.io/rgbdslam_v2/) running on a Core i7 computer with a Nvidia GTX 780 graphics card. The computer runs Ubuntu 12.04.5 and ROS Hydro....
View Articlemake tf from rosbag data raw
Hello, I am trying to make tf tree from rosbag file and raw topics like /imu/data and /scan without tf topic. At the time when record the bagfile, we don't know the tf jet and now we want to make the...
View Articletf::TransformListener::transformPose [exception] target_frame does not exist
Hi, I am trying to transform `geometry_msgs::PoseStamped` in one frame to other. I am using `tf::TransformListener::transformPose` here is my code snippet. tf::TransformListener listener;...
View ArticleCould not transform imu message from imu_link to base_footprint
Now I am migrating a handover code which can run in diamondback to run in groovy. I have changed the code according to the migration log and it compiles successfully. But when I run it in the real PR2...
View Article[TF] Extrapolation into future - Wierd Chain?
Hey everyone, I have the issue, that while running moveIt, I get transforms errors: [ERROR] [1410959502.463512661]: Transform error: Lookup would require extrapolation into the future. Requested time...
View ArticleHow do i use ros TF to capture object position based on colour and calculate...
Hi im currently doing position detection. By using Opencv color(red) detection i detect the red object and now i want to publish it in the tf and show where and the distance between the object and camera.
View ArticleTF2 - static_transform_publisher - Extrapolation into the future
Hello, I have a couple of static_transform_publishers from the TF2 package running. How is it possible that a node complains about extrapolating into the future, when it tries to lookup a...
View Articlereading a specific tf frame
Hello, Does anyone know if there is a function that lets you read a specific tf frame such as: .readFrame("/base_link" , time(latest info published), //frame reference); I need to be able to read a...
View Articletf tree is invalide because it contains a loop
I am trying to display my laserscan on rviz but its status flickers between Status:Ok and Status:Error because of Transform. Transform [sender=/depthimage_to_laserscan] For frame [camera_depth_frame]:...
View Articletf message_filters and child_frame_id
Message filters are handy when you want to only fire callbacks if a transform is available for the data contained therein. The user sets the target frame_id, and presumably the source frame_id is...
View Articletransform broadcaster orientation problem
Hello, I am using a turtlebot 2 with ros-groovy. I have successfully wrote a publisher that takes the base_link and broadcasts that info. I am working on writing a broadcaster for the base_footprint....
View ArticleThe problem of Transformer::lookupTransform
Recently, I follow the tf tutorial and try to understand the frame transformation in ROS. But I'm confusing about the API `Transformer::lookupTransform ` and `tf_echo` First, the usage of tf_echo is...
View Articletf rotation before translation?
I cannot find any documentation on convention used by tf. $ rosrun tf tf_echo /map /odom At time 1263248513.809 - Translation: [2.398, 6.783, 0.000] - Rotation: in Quaternion [0.000, 0.000, -0.707,...
View ArticleWhy is a transform not available after waitForTransform?
Hello ros-users, I have strange issue with tf-transforms. I use laser_geometry::LaserProjection to project laser scans to point clouds, but I assume the problem is related to tf. The code-snippet is...
View Articletransform listener can not look up /map frame
Dear All, I am asking a weired question about the transform listener. I have tried the following two code, one with lookup base_link to odom and one to look up base_link to map. The result is I can get...
View ArticleError with boost while building tf package in catkin ws
I'm building the imu_filter_madgwick package from the [imu_tools](https://github.com/ccny-ros-pkg/imu_tools) package using the command catkin_make_isolated --install --from-pkg-with-deps...
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