dasanche's profile - activity

Yes, by default ROS works in meters. I can see you have a transformation to cm (odometry_to_cm) that makes me doubt.

Yes, by default ROS works in meters. I can see you have a transformation to cm (odometry_to_cm) that makes me doubt.

Yes, by default ROS works in meters. I can see you have a transformation to cm (odometry_to_cm) that makes me doubt.

Yes, by default ROS works in meters. I can see you have a transformation to cm (odometry_to_cm) that makes me doubt.

Yes, by default ROS works in meters. I can see you have a transformation to cm (odometry_to_cm) that makes me doubt.

Yes, by default ROS works in meters. I can see you have a transformation to cm (odometry_to_cm) that makes me doubt.

Normally you can edit the original message to update. Are you also publishing the tf transform? Do you have all your d

Does your rosbag publish a /clock topic?

As you say, in that code you have all the variables you need. Only one strange thing, you have a transformation to cm,

You can find the API you're looking for in here: http://docs.ros.org/melodic/api/tf/html/python/transformations.html T

What do you mean you spawned different turtles using ROSSERVICE, did you use something like this? rosservice call /spaw

If you have a working solutions, please mark it as the accepted answer.

Do you have a map to compare the scans with? What kind of laser is it? Do you have an other sensor data? For 2D scans a

Hello,

I'm trying to build this project ( http://wiki.ros.org/apriltag_ros ) in Ubuntu 18.04 and ROS-melodic.

I just did:

(i) cd catkin_ws/src/

(ii) git clone https://github.com/AprilRobotics/apri...

(iii) cd catkin_ws/ & catkin_make

I'm getting a linking problem against a very basic ROS library:

[ 96%] Linking CXX executable /home/das/catkin_ws/devel/lib/apriltag_ros/apriltag_ros_single_image_client_node
CMakeFiles/apriltag_ros_single_image_client_node.dir/src/apriltag_ros_single_image_client_node.cpp.o: In function `main':
apriltag_ros_single_image_client_node.cpp:(.text.startup+0x101): undefined reference to `ros::NodeHandle::NodeHandle(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__debug::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&)'
apriltag_ros_single_image_client_node.cpp:(.text.startup+0x1b0): undefined reference to `ros::NodeHandle::NodeHandle(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__debug::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&)'
collect2: error: ld returned 1 exit status

Any idea why?

Solved by removing the .catkin_tools, .private, build, devel, logs directories in the root of the workspace manually. In

Linking problem when building apriltag_ros package Hello, I'm trying to build this project (http://wiki.ros.org/aprilta

I cloned the repo last week in a colleagues computer and made it work with an Xtion Primesense on Friday, did no changes

Because that code performs humand body (including hand) body tracking in real time. The software is based on the detect

Hello, I've used Apriltags and ROS in several projects. The wrappers change a lot with time and therefore there are se

Hello, For real time hand pose detection I'd take a look at this code. https://github.com/CMU-Perceptual-Computing-L

Sorry or the delay, I forgot to answer. Thanks a lot for the feedback!

Hello,

I'm trying to implement a particle filter using the BFL library from Orocos.

My problem is that my measurement system is multi-modal and in some cases non-analytical, with up to 30 measurements. For some measurements I have and expected value of 0, but for most of them I just know that they should be < 0, but I can't be sure in advance of the exact value. So, it s a bit different from the examples given in BFL website, or in the one from ROS, because they always know the value of the measurement they expect and then use a gaussian distribution to define to probability of this measurement.

I came up with the idea of applying every measurement value I get to a function that gives me an ouput between 0 and 1, and then multiply all these values into a final number (also between 0 and 1) that would be my probability for that measurement.

I'm not sure if this idea has any sense in for the measurement model. If not, can you suggest any way to handle this?

Thank very much!