AlessioParmeggiani's profile - activity

I think the error come from the fact that you are running roscore in a ROS2 distribution such as Foxy. ROS 2 doesn't ha

The difference appear when using namespaces. If I am using a node with namespace "robot1" and subscribe to the topic "/m

The difference appear when using namespaces. If I am using a node with namespace "robot1" and subscribe to the topic "/m

Can't receive messages on other machine (A message was lost) Hi, I am using ros2 humble, I am encountering a problem whe

Can't receive messages on other machine (A message was lost) Hi, I am using ros2 humble, I am encountering a problem whe

@Andromeda Actually no, the ping does not work in both directions. Ping only works on WSL by pinging the machine with Ub

Thank you for the answer, I'll check the provided link. I removed the images as requested, sorry for that

Can't publish any message from machine running Ubuntu WSL to my robot Hi ;), i have a problem with my setup. As describe

I partially solved the problem, i used rosrun rqt_reconfigure rqt_reconfigure to change the parameters of the topic /zed

Can't publish any message from machine running Ubuntu WSL to my robot Hi ;), i have a problem with my setup.. As describ

The problem probably occur because you are using uncompressed images, try to stream compressed images using the image_tr

you must have both computers on the same local network, then on each terminal you have to do: 1. export ROS_IP=IP_OF_

you must have both computers on the same local network, then on each terminal you have to do: 1. export ROS_IP=IP_OF_

you must have both computers on the same local network, then on each terminal you have to do: 1. export ROS_IP=IP_OF_

Thanks for the answer, I'll try your suggestion :)

How to integrate external map->odom transform into rtabmap? Hi, I have a question about localization of a robot and i

How to integrate external map->odom transform into rtabmap? Hi, I have a question about localization of a robot and i

You can use the command line tool rostopic bw to check the bandwidth used by a certain topic. Documentation

You can use the command line tool rostopic bw to check the bandwidth used by a certain topic. Documentation

I partially solved the problem, i used rosrun rqt_reconfigure rqt_reconfigure to change the parameters of the topic /zed

I partially solved the problem, i used rosrun rqt_reconfigure rqt_reconfigure to change the parameters of the topic /zed

I partially solved the problem, i used rosrun rqt_reconfigure rqt_reconfigure to change the parameters of the topic /zed

Hi, I have a problem regarding the depth computed using the Zed2i stereo camera on a jetson Nano on Ubuntu 20.04 with ROS noetic. I am using zed_ros_wrapper to connect the zed to ROS noetic.

By launching the file zed2i.launch to use the camera I get about 2fps for the depth images using quality=performance (the lowest setting) when looking at the images in another computer.

Some details:

• the problem starts in the exact moment I subscribe to the depth topic using Rviz or rostopic, I guess this is when the Zed starts computing the depth.
• By using zed depth viewer, so without using ROS, I get about 30fps with depth quality set to ultra.
• When visualizing using rostopic hz the rate of the depth on the Jetson Nano I get about 13 fps
• When visualizing using rostopic hz the rate of the same depth topic on another computer I get 2 fps
• When visualizing multiple normal image topics on another computer the visualization is smooth: about 15-20 fps

I already tried subscribing to the compressed topics but nothing changed.

The strange thing is that it does not seem to be a computational issue because the Nano achieve 15 fps on its terminal, and it should not be a communication issue since with normal images I get an high rate on the receiving PC.

Environment:

• Jetson Nano
• Ubuntu 20.04
• ROS noetic
• CUDA 10.2
• Jetpack 4.6-b197

I partially solved the problem, i used rosrun rqt_reconfigure rqt_reconfigure to change the parameters of the topic /zed

Hi, I am trying to tune the many parameters of RtabMap, in particular the ones of the stereo_odometry node.

I have some doubts: in this paper it's written that "for F2F (Odom/Strategy=1), optical flow is done directly on GFTT features without having to extract descriptors".

My question is: if I change the parameter Vis/CorType to 0, so the correspondences computation approach is Features Matching, which approach is used? features matching or optical flow?

Similarly If I change the parameter Vis/FeatureType to use different features than GFTT, is this parameter valid, or with F2F approach the only parameter used is the one described in the paper?

Also another question: there is a way to view at the detected features? My idea is to plot the corners (for F2F) and wordsValues (for F2M) points in the OdomInfo message but I don't know if there is a better way.

I am using Ubuntu 20.04 with ROS noetic and rtabmap built from source