ROS

Control your robot with a joystick in ROS

3 Comments / ROS /

In other tutorials, I showed how to get access to the joystick and how to code with that. In this tutorial, I’m going to show you how to do that without writing any line of code. First, install the required packages:

Now call the following

  This will publish the topic “/joy_node” which […]

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Controlling your robot with joystick and reading data from it

Leave a Comment / C++, ROS, Tutorials /

First, install the necessary package:

make sure your joystick is working:

also, make sure your controller has correct permissions:

The permission on the last column must be rw, if it “–” like this:

then correct the permission:

run the Joy node and roscore:

The joystick data are being published under

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How to use a calibrated camera in ROS

2 Comments / Computer Vision, ROS, Tutorials /

In my previous tutorial I showed you how to calibrate a camera with ROS. In this tutorial, I’m gonna show you how to rectify the images from coming from your camera. First, open your text editor and paste the following text into it:

make the necessary changes and save it under usb_cam_stream_publisher.launch Now run it:

Open

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Real-time object recognition and 6DOF pose estimation based on Linemod algorithm with ROS and PCL pointcloud

5 Comments / Computer Vision, Machine Learning, ROS, Tutorials /

In this tutorial, I’m gonna show you how to do object recognition and 6DOF pose estimation in real-time based on Linemod algorithm with ROS and PCL pointcloud. First, you need to install ork:

Then add the model of your object for tracking to Couch DB:

You need to install Kinect driver, if you don’t

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Making occupancy grid map in ROS from gazebo with Octomap

4 Comments / C++, ROS /

Here is an example of obtaining occupancy grid from sensory data of turtlebot robot. 1.First you need to install all dependencies for gazebo and turtlebot and  octomap server:

2. Launch gazebo in a simulated environment:

3.Launch RVIZ to view the published data

3.Move your robot via keyboard:

to learn how to move the robot with

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6DOF pose estimation with Aruco marker and ROS

29 Comments / Computer Vision, Image Processing, ROS, Tutorials /

ArUco is a simple yet great library for augmented reality applications. In this tutorial, I’m gonna show you how to track ArUco marker and estimate their 6DOF pose with ROS. For this tutorial, you only need a USB camera. You need to calibrate your camera before first. If you don’ know how to that just follow my other tutorial

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