ytosclee's profile - activity

Hi, I am using Ubuntu 20.04 and ROS Noetic. I followed the rosserial tutorial arduino setup page but I cannot compile the ros_lib HelloWorld example in Arduino. It gives me the following error. I am not able to resolve it and I would like to ask for your help! Thanks a lot!

    In file included from /home/kk/Arduino/libraries/ros_lib/std_msgs/Time.h:7:0,
                 from /home/kk/Arduino/libraries/ros_lib/ros/node_handle.h:40,
                 from /home/kk/Arduino/libraries/ros_lib/ros.h:38,
                 from /home/kk/Arduino/libraries/ros_lib/examples/HelloWorld/HelloWorld.pde:6:
/home/kk/Arduino/libraries/ros_lib/ros/msg.h:40:10: fatal error: cstring: No such file or directory
 #include <cstring>
          ^~~~~~~~~
compilation terminated.

exit status 1
Error compiling for board Arduino Leonardo.

Visualization marker - Frame doesn't exist Hi, I run into an issue with the visualization marker. It shows the frame doe

Visualization marker - Frame doesn't exist Hi, I run into an issue with the visualization marker. It shows the frame doe

Visualization marker - Frame doesn't exist Hi, I run into an issue with the visualization marker. It shows the frame doe

Thanks, it solves my problem.

Thanks, it solves my problem.

Rosserial Arduino Compilation Error: No <cstring> Hi, I am using Ubuntu 20.04 and ROS Noetic. I followed the rosse

Rosserial Arduino Compilation Error: No <cstring> Hi, I am using Ubuntu 20.04 and ROS Noetic. I followed the rosse

Rosserial Arduino Compilation Error: No <cstring> Hi, I am using Ubuntu 20.04 and ROS Noetic. I followed the rosse

Hi Funky_Watermelon, yes, the dynamic configure will create ROS parameters. So you can get/update the value using the RO

Hi Funky_Watermelon, yes, the dynamic configure will create ROS parameters. So you can update the value using the ROS pa

Thanks! I update the ID and it is working.

Thanks! It is strange that id is the same works for sphere. I update the ID and it is working. Thanks again1

THnaks! It is strange that id is the same works for sphere. I update the ID and it is working. Thanks again1

Visualization marker line_list replaces by new line_list Hi, I setup visualalization marker line list to displace calcul

Visualization marker line_list replaces by new line_list Hi, I setup visualalization marker line list to displace caluca

Thanks for the answer! I will try to get the point clouds and the rgb image at the same time, run the algorithm and chec

Realsense Color Image Pointcloud Synchronization Hi, I use color image to filter out a moving object and I use PointClou

I am using R415 realsense camera and the realsense package can output the PCL.

Hi, I would like to create TF for an object detected in OpenCV using depth camera. When I look at the code from the book "ROS Robotics By Example", they use the X, Y coordinate detected in the picture and put that directly into the TF. I am confused here. The X, Y coordinate is just the pixel from the photo, why they can put it in the TF directly? Thanks!

# Find the circumcircle of the green ball and draw a blue outline around it
(self.cf_u,self.cf_v),radius = cv2.minEnclosingCircle(ball_image)
ball_center = (int(self.cf_u),int(self.cf_v))

#This function builds the Crazyflie base_link tf transform and publishes it.
def update_cf_transform(self, x, y, z):
      # send position as transform from the parent "kinect2_ir_optical_frame" to the
      # child "crazyflie/base_link" (described by crazyflie.urdf.xacro)
      self.pub_tf.sendTransform(( x, y, z), tf.transformations.quaternion_from_euler(self.r, self.p, self.y), rospy.Time.now(), "crazyflie/base_link", "kinect2_ir_optical_frame")

https://github.com/PacktPublishing/ROS-Robotics-By-Example/blob/master/Chapter_9_code/crazyflie_autonomous/scripts/detect_crazyflie.py

Hi, I have a depth camera mounted on a robot and I define its position in the URDF. It works fine in RVIZ. But when RVIZ is not running, I am wondering if the system still knows depth camera position or not. Do I need to broadcast a TF to show the camera position? If yes, will it conflict with the URDF when RVIZ is running? Thanks!