All Questions
Tagged with opencv calibration
14 questions
1
vote
0
answers
224
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Why would we solve AX=XB instead of just using the Kabsch algorithm?
I have a high precision stereo camera and a robot which are independent units (the camera is not mounted to the robot). I wish to compute a transformation from the camera frame to the robot base frame....
- 111
0
votes
1
answer
46
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Trouble aligning/calibrating camera with laser scanner
I have a robot which has 2 multi-spectral cameras and 1 laser scanner attached. In the end I would like to have the images from the cameras aligned with the scanner so that I can have spectral ...
- 101
0
votes
2
answers
17
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camera_calibration opens gui window but freezes
I'm trying to run the camera_calibration node. I run this command:
...
martinakos
0
votes
1
answer
13
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Using camera calibration results in OpenCV
I've calibrated Kinect intrinsics (both depth and rgb) using camera_calibration module and saved a bunch of rgb images afterwards (calibration file was detected successfully; subscription to kinect1/...
Mikhail K.
3
votes
1
answer
1k
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OpenCV get topdown view of planar pattern by using intrinsic and extrinsic from cameraCalibrate
Originally I have a image with a perfect circle grid, denoted as A
I add some lens distortion and perspective transformation to it, and it becomes B
In camera calibration, A would be my destination ...
- 151
1
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0
answers
40
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Are homogeneous coordinates represented by appending image coordinates with a 1 in camera imaging
In camera imaging, there are several terms for point coordinates.
World coordinates: [X, Y, Z] in physical unit
Image coordinates: [u, v] in pixel.
Do these coordinates become homogeneous ...
- 273
0
votes
1
answer
5k
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normalized point coordinates in undistortPoints function
In undistortPoints function from OpenCV, the documentations says that
http://docs.opencv.org/2.4/modules/imgproc/doc/geometric_transformations.html#undistortpoints
where undistort() is an ...
- 273
0
votes
1
answer
148
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image_geometry projectPixelTo3dRay World Coordinates
Good evening,
i have a problem and i need help as fast as possible. For a tracking program i try to subscribe from two image_rect_color + their ...
Gren8
0
votes
3
answers
74
views
What does projection matrix provided by the calibration represent?
I'm using such a tool from ROS/OpenCV in order to perform the camera calibration. The procedure ends up providing: camera matrix, distortion parameters, rectification matrix and projection matrix. As ...
mateo_7_7
0
votes
1
answer
6
views
Kinect calibration "Unknown OpenCV format yuv422"
Hi all,
I would like to intrinsically calibrate my asus sensor. Therefore I used the "openni_launch/Tutorials/IntrinsicCalibration" page. I calibrated the IR without problems. Now I want to ...
dinamex
0
votes
1
answer
6
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camera_calibration: checkerboard target not found
Hello everyone!
I am having a really hard time calibrating my Videre Design stereo cameras within ROS. My driver node is publishing the appropriate CameraInfo and Image messages, but the calibration ...
georgebrindeiro
0
votes
1
answer
69
views
3D calibration in OpenCV without chessboard images?
It takes me a long time to get functions to work in OpenCV so I'd like to know whether my overall plan makes sense before I dive into the details of trying to make it happen. (Open CV 2.3.1, Windows ...
Cherry 3.14
0
votes
1
answer
13
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OpenCV circles grid calibration
Hi everyone,
I was wondering if anyone has had experience with the new OpenCV circles grid calibration pattern. Any better results? Any worse results? Sad that your beautiful metal checkerboards ...
Chad Rockey
0
votes
1
answer
6
views
Camera pose calibration with multiple camera's
Hi,
we're using the camera_pose_calibration package and try to calibrate multiple camera's with it.
We followed the instructions at http://www.ros.org/wiki/camera_pose_calibration - which went well.
...
Steven Bellens