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Questions tagged [robotics]

Robotics is the branch of technology that deals with the design, construction, operation, structural disposition, manufacture and application of robots. Robotics is related to the sciences of electronics, engineering, mechanics, and software. You may also consider asking your question on *robotics* Stack Exchange: https://robotics.stackexchange.com/.

Robotics is the branch of technology that deals with the design, construction, operation, structural disposition, manufacture and application of robots and computer systems for their control, sensory feedback, and information processing.

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Is there a special type of multivariate regression for multiple-parameter predictions?

I am trying using multivariate regression to play basketball. Specificlly, I need to, based on X, Y, and distance from the target, predict the pitch, yaw, and cannon strength. I was thinking of using multivariate regression with multipule variables…
technillogue
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Issue regarding practical approach on machine learning/computer vision fields

I am really passionate about the machine learning,data mining and computer vision fields and I was thinking at taking things a little bit further. I was thinking at buying a LEGO Mindstorms NXT 2.0 robot for trying to experiment machine…
Simon
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Which bar code type is the most robust when used with mobile machine vision and a tool like OpenCV?

I want to use bar codes to help a robot navigate a home. I was looking at QR codes and a few other kinds, but I don't know enough about bar code recognition to know up front the variant that will give me the highest success rate when viewed at…
Robert Oschler
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Multi threading using NXT

At my robotics club we are trying to get the multi-threading capability to work on LEGO Mindstorms NXT, but it seems that the threads are interfering with each other and causing the program to stop entirely. Does anyone know how to correctly…
Joseph Burley
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Localization using ultrasonic sensors

I don't know if this is the right place to ask this question. I am working on a project in which I have to use ultrasonic sensors only to do "simultaneous localization and mapping" of robot. I have 8 such sensors. Assume that i have enough…
Julius Canute
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How can I parse "package://" in a URDF file path?

I have a robot URDF that points to mesh files using "package://". I would like to use urdfpy to parse this URDF. However, it is unable to interpret the…
hexkeybearing
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Eye-In-Hand Calibration OpenCV

I have a setup where a (2D) camera is mounted on the end-effector of a robot arm - similar to the OpenCV documentation: I want to calibrate the camera and find the transformation from camera to end-effector. I have already calibrated the camera…
ChrisRun
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principle point in camera matrix ( programming issue)

In a 3x3 camera matrix what does the principle point do? how its location is formed? can we visualize that? It is told that the principle point is the intersection of optical axis with the image plane. but why it is not always in the center of…
C graphics
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Robust Localization for environment with low features

I am new to SLAM and autonomous driving. Case: Robot needs to start from point A and reach point B with maximum accuracy as well as precision for all the cases. The only object around it is the table (shaded box in the pic) and the ground it travels…
Pe Dro
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Control Webots from external Python IDE

Is it possible to control Webots from external Python IDE (like pyCharm) ? I would appreciate if there is an example showing how to do so and location of modules to be added. Thanks
wbadry
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rosbag record -a - not collecting bag file

I am trying to capture the bag files for all the ROS topics using rosbag record -a. And when I terminate the record using Ctrl+C, the bag file captured is showing in .bag.active status and it looks like no data is being captured as the size of the…
KK2491
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Explaining environments in Roboschool Half-Cheetah

I have some questions regarding the roboschool Half-Cheetah. I see that the observation space for Half-Cheetah is 26. Can anyone tell me what is each value for?- I only counted 18. (also, some of the values seem to remain 0 for all timesteps) In…
Claire
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What is the future of filtering methods vs incremental-SFM in visual-SLAM

In the Visual SLAM area, there's the well-known solution of EKF/UKF/Particle-SLAM , like the "mono-slam". Recently , there was a direction to Local Bundle Adjustment methods , like lsd-slam or orb-slam .. My question is : Do the filtering ways…
Yasin Yousif
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Custom controller dies when launched in global launch file

I have a custom robot consisting of different nodelets and controllers which are organized in sub-packages: . ├── project │   ├── launch ├── project_description │   └── urdf ├── project_hardware │   ├── config │   ├── launch ├── project_logic │  …
Julian Heinovski
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Can I implement potential field/depth first method for obstacle avoidance using boost graph?

I implemented an obstacle avoidance algorithm in Matlab which assigns every node in a graph a potential and tries to descend this potential (the goal of the pathplanning is in the global minimum). Now there might appear local minima, so the (global)…
Philipp
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