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.
Questions tagged [calibration]
320 questions
9
votes
2 answers
Calibrate a 2d scanner mounted on a rotary axis
A 2d laser scanner is mounted on a rotary axis. I wish to determine the transformation matrix from the center of the axis to the center of the scanner, using only the input from the scanner and the angle of rotation.
The 2d scanner itself is…
HugoRune
- 369
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2
votes
0 answers
Robot Hand to Eye calibration without joint encoder
I have two degrees of freedom robot with a camera mounted on the tool center point where the system is modeled as
$^wT_c = {^wT_z}(\theta_1){^zT_m}(\theta_2) {^mT_c}(\textbf{r})$, $\textbf{r} \in SO3$
I have to calibrate mount to camera…
Chanoh Park
- 1,567
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1
vote
2 answers
The Benefit of Hand-Eye calibration with 2D camera
I have a general question about the benefit of Hand-Eye calibration.
I know that the Hand-Eye calibration can be done with many softawres by solving the AX=XB or AX=ZB equation. But my question is, how can I use this calibration information…
Mhmd
- 11
- 1
0
votes
2 answers
Publishing CameraInfo messages from YAML file
I have a bag file that publishes camera/image_raw. I also have the calibration parameters of the corresponding camera in a separate YAML file. How can I publish cam_info messages using only the YAML file so that I can rectify the…
mohito
0
votes
1 answer
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 the same time by create a service with node…
khairidine
0
votes
1 answer
rosbag of extrinsic calibration
http://www.ros.org/wiki/openni_launch/Tutorials/ExtrinsicCalibration
my system is ubuntu11.10,installed with ROS( electric) and openni_kinect.
Use rosbag to record 10 seconds of RGB data to rgb.bag:
rosbag record --limit=300 -O rgb…
rosmaker
0
votes
1 answer
Does OpenCV's undistortPoints also rectify them?
I'm trying to determine the distance between two object by using two cameras (OCV 2.3.1, MSVC++, Win7) but can't calculate the object's objectPoints. I think this is because the image points aren't being rectified before their disparity is…
Cherry 3.14
0
votes
0 answers
Focus calibration to infinity
Well, it sounds easy problem but can we do it without pointing the camera to a faraway place?
How does the manufacturer do this during mass production? Is there any focusing machine?
Chanoh Park
- 1,567
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0
votes
0 answers
How to calibrate a lens with wide fov and low F number
To calibrate a wide fov lens either a calibration board should be large or bring the calibration board closer to the lens. As making a large calibration board is expensive, I usually prefer the second solution but making a short distance does not…
Chanoh Park
- 1,567
- 9
- 16
0
votes
0 answers
Closed-form solution of extrinsic in 2D to 3D projection problem
The title is pretty much it.
Anyone have seen a closed-form solution of extrinsic on 2D to 3D projection problem?
Seems like this should exist in old camera calibration literature but I can't really find it.
Chanoh Park
- 1,567
- 9
- 16
0
votes
1 answer
How to get transformation between a camera and a CNC plotter?
I have a question about robot and camera calibration.
I have experience to calibrate btw 6DOF robot arm and hand-eye camera.
But this time I should use a machine like CNC plotter. This machine can move only x and y directions and no rotation. I…
Soonmyun Jang
- 105
- 3
0
votes
1 answer
Hand-Eye calibration of a 2D barcode scanner and a robot
I have a Keyence barcode scanner that can give me the coordinates of a detected barcode in pixels. I have a 6 DOF robot whose end effector pose I know at any given time. My ultimate goal is to place a new label on top of an existing label that is on…
trycatch22
- 101
- 1
0
votes
1 answer
validateURL failing even when a proper file is present
Dear Experts,
I have been trying to use CameraInfoManager::validateURL function with the following code snippet
camera_info_->setCameraName("my_cam");
if (access(camera_calibration_file_param_.c_str(), F_OK) != -1)
{
if…
shouvik1984