New answers tagged ros
0
Yes, it is possible. That is often called a heterogeneous stereo camera.
Step1: stereo camera calibration.
Find relative camera location to each other (extrinsic).
Find camera lens distortion parameters (intrinsic).
Lens distortion is simply done by usual camera calibration but for the extrinsic finding, you need a bit of coding.
Step2: image rectifying
If ...
1
On the theory side, this is related to the Nyquist Sampling Rate, which is how frequently you must measure a single to get an accurate reconstruction of it's peaks / valleys.
Not suprisingly, Nyquist as a name appears all over some fundamental results in optimal control like the nyquist stability theorem. I suspect the insight you are looking for is right ...
0
The problem is that you are using VMWare. For some reason, when I used a physical machine with ROS and Ubuntu, it worked! Maybe there is a fix in VMWare. If anybody knows the solution, they are free to explain.
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You cannot rename topics in your node and use them from the command line. If you want to use command line, you have to define them as args before the node. In your case, under arguments, define:
<arg name="goal_topic" default="/move_base_simple/goal" doc="goal topic for turtlebot3"/>
and in your remap,
<param name=&...
-3
I can recommend an attractive Real Time tool platform that can be directly installed on a PC with a minimum processor performance (Intel, AMD 1750 MHz, Ram 2 - 4 Gb). For example, it can be a tablet or SBC (OS Windows, LTSC).
Platform website and many examples with prototypes
https://www.beeptoolkit.com/
0
This seems like an interesting question! Read it once and haven't put a ton of thought into this, but my gut reaction was a disturbance model.
Suppose you had some optimal path, $P$. Your path planning could be attempting to map that optimal path, but the calculated path might be constantly updating based on noise in sensor readings, localization estimates, ...
0
In a Dockerfile, you cannot add the setup.bash to the .bashrc and then source the .bashrc. Instead, you want to source the setup.bash in one go:
RUN /bin/bash -c 'source /opt/ros/kinetic/setup.bash &&\
mkdir -p ~/catkin_ws/src &&\
cd ~/catkin_ws/src &&\
#catkin_init_workspace &&\
cd ~/catkin_ws &&\
...
0
This command opens the RViz in an X11 window of the Windows X server.
After roscore has started, start a second terminal and enter (according to http://gazebosim.org/tutorials?tut=ros_roslaunch) (you do no need to have the firewall deactivated for this to run, at least in my case):
roslaunch gazebo_ros empty_world.launch
#For killing the app, press Ctrl+C ...
0
I had this problem in my project. If you are sampling very quickly, then sometimes you get zero ticks and sometimes one. That causes a lot of noise. The solution is to only calculate velocity after a sampling time AND minimum number of ticks has passed. I do that in this project. See discussion in docs; https://github.com/Ezward/Esp32CameraRover2/blob/...
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