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does 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

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filter chain failing and move_arm crashing

Hi, I'm using move_arm for collision free arm navigation on ROS fuerte and KUKA robot. Usually things go just fine, but sometimes the filter chain fails and move_arm crashes. I enabled debug output,...

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Problem 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...

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What'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...

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Particle 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...

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Kalman: 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...

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How 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...

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voxel_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...

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Forward 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...

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How 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...

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overlapping 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...

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How 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...

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Split 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...

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Rvis 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...

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remove 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...

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Custom 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...

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Object 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...

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The 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...

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1D 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...

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SICK MRS6124 detecting phantom data, how to filter pointcloud2 data by distance?

Hi everyone, I am using the [sick...

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