Easy hand eye calibration for panda/fr3 and realsense camera

Movit-free hand eye calibration for panda and fr3.

I have tested the code using ROS noetic, a real panda robot and a realsense d435 camera. If you are using a realsense, please install the driver using the command:

sudo apt-get install ros-$ROS_DISTRO-realsense2-camera

I am using the apriltag library to detect the apriltag in the camera image.

Installation of the controller on the computer connected to the robot

Follow the instructions here https://github.com/franzesegiovanni/franka_human_friendly_controllers to install the controller on the computer connected to the robot.

Run the controller before starting the calibration

  roslaunch franka_human_friendly_controllers cartesian_variable_impedance_controller.launch robot_ip:=ROBOT_IP

Create a catking workspace

  mkdir calibration_ws  
  cd calibration_ws 
  mkdir src
  cd src
  git clone --branch ros1-legacy https://github.com/IntelRealSense/realsense-ros.git
  git clone --depth 1 https://github.com/AprilRobotics/apriltag.git  
  git clone --depth 1 https://github.com/AprilRobotics/apriltag_ros.git 
  git clone --depth 1 https://github.com/IFL-CAMP/easy_handeye.git                         
  git clone --depth 1 https://github.com/franzesegiovanni/franka_easy_handeye.git
  git clone --depth 1 https://github.com/platonics-delft/panda-ros-py.git
  cd ..   
  catkin build 
  source devel/setup.bash

Print, measure, and place the marker in front of the robot.

Print the pdf file marker.pdf.

Run the calibration

  roslaunch franka_easy_handeye calibrate.launch

Now, just make the robot compliant using the rqt reconfigure, and move the robot to a different position where you can see the marker in front of the robot. When launching the calibrate file, you have pop-up window that allows you to record the current pose and relative camera position. This is used later to compute the robot camera transformation.