Imu values not being filtered properly
I am getting raw data values from imu. In the raw data, orientation always remains zero (x=0, y=0, z=0, w=0) whereas angular velocity and linear acceleration keep changing their values. I have applied...
View Articledoes hector_slam itself include or use any kind of filter?
Hello, Does hector_slam itself include or use any kind of filter when extracting and building map from laser data, (not in the localization part)? Thanks, Basak
View ArticleProblem in implementing voxel grid filter on the point cloud using Kinect
I am working on ROS Indigo Igloo with platform Ubuntu 14.04. I have to implement voxel grid filter on the real time point cloud obtained by Kinect v1.1. I am following a tutorial...
View ArticleWhat's the rational behind laser_filters/ScanShadowsFilter?
Hi, looking for a filter to remove spurious points in out Sick laser, I gave a try to [ScanShadowsFilter](http://wiki.ros.org/laser_filters#ScanShadowsFilter). It remove most of the noisy beams, but...
View ArticleParticle Filter for multiple target tracking
Hi! I'm now working on a human-aware navigation problem in which I need to have a good people tracker from several sensors onboard and offboard. I have a pretty good detector already that gives me a...
View ArticleKalman: different equations for same states
Hi guys :) I've got a very theoretical Kalman-filter-related question that and I hope that someone has an idea how to solve this: **How is it possible to use 'different' state equations for the same...
View ArticleHow to implement RANSAC algorithm and kalman filter or particle filter with...
I'd like to implement those algorithms by using ROS packages to solve one way the SLAM problem. I know that gmapping, Rviz, slam_gmapping and robot_pose_ekf (for extended kalman filter) could be...
View Articlevoxel_grid filter in all dimensions
I would like to filter point clouds in x, y, and z. I see from the [tutorials](http://wiki.ros.org/pcl_ros/Tutorials/filters#VoxelGrid) and...
View ArticleForward facing text with custom rViz plugin (MessageFilterDisplay)
I'm trying to create an rViz plugin for a custom message. This message includes some information that I want to display as forward facing text. I am currently trying to draw the text myself, as in, I'm...
View ArticleHow does robot_localization fuse pose odometry data?
Hi guys, I have a question concerning the working principle of robot_localization. I'm fusing odometry and IMU data. My odometry provides only absolute pose information, so I'm letting the...
View Articleoverlapping occupancy grid maps
Hi, I need to overlap two pose estimation (from the particle filter) with the map asociated to each of them (the map is the same). After that i need to merge both maps. As a first step I am choose one...
View ArticleHow do you split a rosbag into several files without calling rosbag filter...
I want to split a 100-GB rosbag into 100 1-GB bags. I tried using rosbag filter but it takes a long time as I have to run each filter manually and each time, it performs a scan of the full bag. Is...
View ArticleSplit ROSbag to two
Hi All, I am using rosindigo on two computers. I am using a ROS bag which includes sensor data from a robot (it's the Cartographer Deutsches museum 2D dataset) used to build a map. I would like to...
View ArticleRvis filter point cloud
Edit1: I use a TI radar sensor with teh following rviz commands: Now I tried to insert the following code but there was no effect. But I am not Sure where to add it (I tried to add it after the static...
View Articleremove single data points
Hi I have a pointcloud and i want to remove all single data point which have no specified number ofneighbours. I found the pcl filer nodelet and the RadiusOutlierRemoval which does this think. But I...
View ArticleCustom filter (box) for pointclouds
I need to cut out a box (basically reimplement pcl::CropBox [link](http://docs.pointclouds.org/trunk/crop__box_8hpp_source.html#l00049)), but with the following code and the pcl::CropBox itself I do...
View ArticleObject detection with radar
Edit1: I did now some research and so I realized that I have to describe the problem in more detail. I have a radar sensor which provides a pointCloud to me with the measured points. Objects that are...
View ArticleThe sequence between 2 rostopic messages subscriber
Say I have 2 rostopic messages subscribers A and B listening to 2 different topics "a" and "b", however, I would to only processing the msg in A when the subscriber B got all messages from topic...
View Article1D positioning using robot_localization package
I've recently started learning about ROS. I am currently working on a project where I am designing a vehicle. This vehicle contains 2 motors. Main motor which is a brushless DC is driving rear wheels...
View ArticleHow do I implement a Low Pass filter to reduce the noise coming from a topic...
I was able to record the [WrenchStamped](http://docs.ros.org/lunar/api/geometry_msgs/html/msg/WrenchStamped.html) data from the topic to a .bag file, export that data to a .csv file, and finally wrote...
View ArticlePCL/ROS Cropbox doesn't show anything?
I am trying to crop my PointCloud2 using ROS and PCL_ROS, but unfortunately I can't find my mistake. The mistake being, that Rviz doesn't show my cropped cloud, even though the topic gets published and...
View ArticleHow to use CropBox on PointCloud2
I have a tof camera with the type PointCloud2. I have looked a bit and found the cropbox function. I am a beginner in ros and I don't know how to use it. I found this code: pcl::CropBox boxFilter;...
View ArticlePoint cloud filtering "box"
I need to filter my point cloud and I found this link: https://answers.ros.org/question/10121/point-cloud-box-filtering/ I have created a launch file commented the x y nodelets. I want to filter the...
View ArticleNode crashing on RANSAC filter
I am following a tutorial by the ROS Industrial group to explore perception in ROS and I keep getting the error "Process has died" after including the RANSAC plane segmentation filter. I was successful...
View Articleimu_filter_madgwick does not compile properly on Ubuntu18.04 - Melodic
Hello, I downloaded the `imu_filter_madgwick` tool from [here](https://github.com/ccny-ros-pkg/imu_tools) and installed on my `catkin_ws`. Unfortunately it does not compile and the problem is due to...
View ArticleHow to filter camera noise
I have read this page: http://wiki.ros.org/cob_3d_mapping_filters And I wanted to ask if it is useful for me. I am using a pico flexx. And it publishes pointcloud2 data. My intention is to remove the...
View Articleekf_localization_node : Wheel odometry and IMU filter output...
I'm trying to filter the IMU and Odometry for better odometry result with ROS Kinetic robot_localization ekf_localization_node. The result from topic /odometry/filtered looks even worst than the only...
View ArticleHow to filter robot's footprint from a pointcloud
I have a laser scanner on a rotating head that I will use to generate a point cloud. The only problem is that the orientation and scan angles of the lidar are such that the back of the robot will show...
View ArticleWhat is a good way of storing robot paths and access them?
Hi guys I am writing a controller for a 6DOF robot arm. I am generating paths for the robot to come from the starting point to a desired pose. To do this I do a piecewise polynomial interpolation....
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