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Questions tagged [calibration]

Correlate the readings of a robot's instrument, sensor, etc. with those of a standard in order to check its accuracy. Adjust experimental results to take external factors into account or to allow comparison with other data.

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Aligning datasets with drift

I have a dataset that contains position information from tracking a robot in the environment. The position data comes both from a very accurate optical tracking system (Vicon or similar) and an IMU. I ...
rhymeface's user avatar
2 votes
3 answers
2k views

Camera Calibration fails to run on ROS

I am running ROS Indigo on Ubuntu 14.04. I am doing a mono-camera calibration and trying to follow the camera calibration tutorial on the ROS Wiki. I give the following command: rosrun ...
Nagsaver's user avatar
8 votes
1 answer
2k views

Hand Eye Calibration Solver [closed]

I have a rig for which I have a pretty good estimate of the static transformation between the camera and a joint based off of the CAD. It has some errors though and I was hoping to fix it by doing a ...
Nandan Banerjee's user avatar
0 votes
1 answer
14 views

Camera Calibration with Freenect Kinect driver

Hello, I'm working with a Kinect and the Freenect driver package. The Kinect is working fine and the distances provided are also fine. But I think I should calibrate the Kinect, if I do not people ...
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10 votes
2 answers
4k views

Why do we generally prefer DH parameters over other kinematic representations of robot arms?

I am specifically interested in DH parameters versus other representations in terms of kinematic calibration. The best (clearest) source of information I could find on kinematic calibration is in the ...
Ben's user avatar
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1 answer
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ueye_cam calibration and parameters

I'm trying to use ueye_cam package to control two uEye cameras: a UI122xSE-C and a UI223xSE-C. I've installed the IDS driver and I can use it to open both cameras. ...
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2 votes
2 answers
331 views

PTAM CameraCalibrator error

I am trying to run the cameracalibrator.launch using PTAM according to this Camera Calibration tutorial. However, when I do so, I get the following error: ...
K S's user avatar
  • 171
0 votes
1 answer
4 views

Stereo camera calibration: system error

Hi all, I'm trying to perform a calibration of a stereo usb camera using the usb_cam drivers. I am following the proper tutorial on the ROS wiki page (http://wiki.ros.org/camera_calibration/Tutorials/...
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4 votes
2 answers
2k views

ROS Calibration Camera Problems

I am trying to calibrate a monocular camera using ROS with the help of this website: How to Calibrate a Monocular Camera. When I run rostopic list, I get: ...
K S's user avatar
  • 171
0 votes
1 answer
2 views

Error while interfacing my webcam to ROS

I installed ros-indigo-usb-cam package and executed the code rosrun usb_cam usb_cam_node ~video_device "/dev/video0" which resulted in following error [...
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0 votes
1 answer
6 views

viso2 stereo disparity

I am trying to use viso2_ros . So I calibrated my stereo camera set. Does the distance between the cameras matter much?Is this setup good enough? The above are my calibration results.Is that fine? I ...
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0 votes
1 answer
55 views

Unable to set camera info for calibration

What can be wrong if I get the following error upon camera calibration? ...
IsaacS's user avatar
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7 votes
3 answers
15k views

Hand Eye Calibration

I'm trying to use a dual quaternion Hand Eye Calibration Algorithm Header and Implementation, and I'm getting values that are way off. I'm using a robot arm and an optical tracker, aka camera, plus a ...
Andrew Hundt's user avatar
0 votes
1 answer
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Calibration extrinsic Camera_lidar

I want to to calibrate camera with a lidar ,after some search i think the best way is use the toolbox radlocc (MATLAB) for this toolbox is necessary to acquired data from the camera and the lidar in ...
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0 votes
1 answer
3 views

Need suggestions for calibrating Asus Xtion Pro live sensor

Hi, I want suggestions from experts here to calibrate the asus xtion pro live sensor. I am running ROS Hydro on Ubuntu 12.04. Also I want to mention I am using openni2 to run the sensor. I read the ...
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0 votes
1 answer
3 views

camera_calibration runs but cannot calibrate

Hi all, I tried to calibrate my Firefly MV Firewire camera with the provided ROS Indigo package. So I ran roscore and camera1394, and then the command on the wiki. The wiki says that to start the ...
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0 votes
1 answer
6 views

How to calibrate libgazebo imu or any other imu for slam?

Hi, I found the service from the imu (/default/imu) which is a std_srv/empty service. Is it just calling and turning the robot or what do I have to do? I already searched and did not find any nice ...
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0 votes
1 answer
72 views

How can I get extrinsic camera parameters from the ROS camera_calibration package

I want to get more a more accurate point cloud and uv-mapping for the Softkinetic Depthsense by calibrating the intrinsic and extrinsic parameters of the depthsense using the ROS camera_calibration ...
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0 votes
1 answer
2 views

[Kinect]About camera calibration

Hello, I just want to calibrate the camera, but i get this message: ...
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0 votes
1 answer
16 views

ROS Answers SE migration: roslint error

I am trying to perform an extrinsic calibration based on the following tutorial: http://wiki.ros.org/industrial_extrinsic_cal/Tutorials/Camera%20to%20Target I have installed all the dependencies ...
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2 votes
1 answer
211 views

FreeIMU External Magnetometer

I have been using the FreeIMU library successfully but now I want to add an external magnetometer that I can mount away from my motors. I've figured out how to modify the FreeIMU library to use an ...
Joseph Roberts's user avatar
0 votes
1 answer
2 views

ar_pose+ceiling camera+calibration file

Hello, I have a ceiling camera that publishes images in the topic "/camera/image_raw" (working and publishing perfectly through the network). I have also calibrated this camera using openCV ...
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0 votes
1 answer
533 views

Mobile Camera Calibration and rectification frame rate

I've been searching the internet for an answer to this question, but I haven't come across anything that will help me. Basically, we have a Meka Humanoid Robot in our lab, which has a shell head in ...
shaun's user avatar
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0 votes
3 answers
40 views

camera_calibration set_camera_info Service not found

I want to calibrate a stereo camera with camera_calibration on Indigo in Ubuntu 14.04. I have two separate webcams connected and use gscam to return the video stream. However when I want to calibrate ...
user avatar
1 vote
1 answer
2k views

3D Magnetometer calibration algorithm

I want to calibrate my compass, which is installed on a board which inherits a GPS module. Because the GPS antenna is up-side-down the compass is 180° inverted. The easiest way to correct the problem ...
dgrat's user avatar
  • 373
0 votes
1 answer
3 views

How to remap service? commit button during camera_calibration doesn't work

Hi, I didn't find accurate answer to this question I would like to remap service from /set_camera_info to /camera/set_camera_info according to this instructions: http://wiki.ros.org/Remapping%...
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0 votes
1 answer
1 view

Camera calibration parameters not appropriate for SVO package

Hello, I have been trying to use the SVO package using Ubuntu 12.04 and ROS Hydro, but I ran into trouble with the calibration file. In the SVO calibration guidelines says that the camera_calibration ...
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0 votes
1 answer
1 view

Eigen not found

I was trying to install industrial_calibration (Indigo branch) but I keep getting the following error: Could not find a package configuration file provided by "Eigen" with any of the ...
user avatar
0 votes
1 answer
18 views

How do you calibrate the extrinsic parameters?

I was trying to calibrate my camera mounted on the robot base so that I can get the transform from base_link to camera_link. i was looking for efficient and fast ways to do this and I found the ...
user avatar
0 votes
1 answer
5 views

ROS Hydro - Cannot commit gscam camera calibration (/set_camera_info not under /camera)

Hello, I started using ROS hydro (in ubuntu 12.04) very recently for a visual odometry project but I got stuck with the following problem: I installed gscam and it runs fine (or at least I think so ...
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0 votes
1 answer
2 views

Minoru 3D webcam calibration ros indigo

Hi everyone, i just bought a minoru 3d webcam to try using it as a low cost RGBD sensor, i'm working in ros indigo, i tried calibrationg the camera with the cameracalibrator.py util, the problem is ...
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0 votes
1 answer
20 views

Explicit address for camera calibration file

I have a few different platforms that are all using the same package. Each platform has a different stereo camera calibration file.yaml Each platform has its own launch file, which gets called (...
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0 votes
1 answer
3 views

stereo image proc bypass

Ubuntu 14.04 ROS Indigo Igloo Bumblebee2 Hello! I am using a lookup table to rectify the images extracted with camera1394stereo generated outside ROS with triclops....
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0 votes
1 answer
13 views

What should I expect from Turtlebot calibration? / How do I know if my Turtlebot is broken?

I'm having a hard time debugging my Turtlebot because I don't know what a functioning Turtlebot should look like. Now that I've read the source code for ...
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0 votes
3 answers
12 views

Should a calibrated frame be in a URDF

I'm working on a robot cell that has many different pieces of equipment. The equipment geometry/location is captured in a single URDF for the robot cell. In operation, I would like to calibrate the ...
user avatar
0 votes
1 answer
2 views

Camera Calibration Uses Wrong Aspect Ratio from USB Camera

We are trying to calibrate a USB camera running at 1080p (i.e., 1920x1080). When launching usb_cam and then image_view, the ...
user avatar
0 votes
1 answer
5 views

cameracalibrator.py error

I am trying to follow the ROS tutorial titled: "How to Calibrate a Monocular Camera", link I am using the gscam driver and have verified that it is publishing correctly. Also steps 1.1-1.3 ...
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0 votes
1 answer
6 views

No GUI during calibration

I am trying to run the calibration tool of the ethzasl_ptam package, but I cannot see any GUI appearing. According to their developer's issue tracker, this problem occurs only for non-nvidia users. ...
user avatar
0 votes
1 answer
2 views

Monocular camera calibration for Nao

I followed the tutorial for camera_calibration package but after I get opengl support available nothing happens. Here is the result of my rostopic list before running camera calibration: ...
user avatar
1 vote
1 answer
1k views

Calculate object distance with camera

Firstly I'm unsure whether this question belongs here or on another SE site (but I'll wing it for now). I've recently been given the job of connecting up a 'smart camera' to a setup where a robotic ...
Robert English's user avatar
1 vote
1 answer
394 views

Are stereo camera calibration data standardized?

Is there a standard format of how stereo calibration data (various matrices, usually saved in XML) are stored? Can I load calibration data generated say from a OpenCV script in C to another OpenCV ...
Kozuch's user avatar
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3 votes
1 answer
190 views

Stereo camera baseline not needed for calibration?

I am doing stereo camera calibration as described in this blog post. I wonder I do not need to input camera baseline for the calibration. The fact probably goes back to some very basic mathematics of ...
Kozuch's user avatar
  • 643
0 votes
1 answer
1 view

problem in camera caliblration

HI guys I tried to calibrate my camera with ptam . but when I ran my camera's node to send image to ptam calibration and I got this err: ...
user avatar
0 votes
1 answer
2 views

freenect - Wrong scale in the PointCloud2?

Hey, I am working on implementing a kinect in my robot-arm using MoveIt. I have an .urdf file with the kinect as a block hovering above the robot. I launch the freenect-node, perform a static ...
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0 votes
1 answer
7 views

Issues with cv_bridge when using cameracalibrator.py in Indigo

After updating to Ubuntu 14.04 and Indigo I'm not able to execute the camera_calibration. With last version of opencv libraries (github repository master) python keeps looking for "cv.so". I ...
user avatar
0 votes
1 answer
5 views

stereo_calibration - rotation and translation matrix from output?

I did a stereo calibration of two rgb-cameras with the camera_calibration package. ...
user avatar
0 votes
1 answer
1 view

camera_calibration

when i try to make sure that my monocular camera is publishing images over ROS by typing the """rostopic list """ the following error appear """ERROR: ...
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3 votes
2 answers
551 views

How to calibrate differential drive?

I'm building a robot with differential drive. I've reached the point when I can drive it around on remote control and I'm trying to get the localization working. Now I would like to exactly measure ...
cube's user avatar
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0 votes
1 answer
2 views

Print the Camera parameters from the file created after Camera Calibration

I have calibrated my monocular camera using the ROS Tutorial. After calibrating the camera, a .yaml file got created which contains the various parameters of the ...
user avatar
0 votes
3 answers
32 views

Camera calibration and fish eye cameras

HI all, Can camera_calibration package be used to calibrate fish eye cameras? Originally posted by aswin on ROS Answers with karma: 528 on 2014-03-04 Post score: 3
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