Questions tagged [camera-calibration]
The camera-calibration tag has no usage guidance.
63
questions
0
votes
0
answers
12
views
How does camera intrinsic parameters change after undistortion
Here is my goal: I have used OpenCV to estimate a camera's intrinsic parameters and distortion coefficients. In order to avoid having to deal with the camera's distortion going forward, I would like ...
0
votes
0
answers
19
views
How to calibrate IMU for large scale deployments possibly using deep neural network
We were testing our visual SLAM algorithm on robots. We were getting poor performance. Then we calculated wite noise and random walk parameters (using kalibr) for the IMU and used it in our algorithm ...
- 111
0
votes
1
answer
272
views
Camera calibration matrix, fundamental matrix and essential matrix at different image resolutions
I have the camera calibration matrix given at a certain image resolution. I am using correspondences between stereo images to calculate the fundamental matrix and then using that to derive the ...
2
votes
2
answers
168
views
Camera sensor artifacts next to edges in calibration images; what is causing these?
I am trying to image some ChArUco targets using a monochrome machine vision camera with a CMOS sensor and the attached images show the artifact I am observing:
2-pixel-wide bright vertical streaks ...
- 41
1
vote
1
answer
74
views
Projection Matrix -- where does it come from?
I've started with these series to teach myself image processing and I am wondering when the camera's projection matrix (i.e. intrinsic and extrinsic matrices) is calculated?
Is camera calibration a ...
- 113
1
vote
0
answers
130
views
calibrating camera using 3d objects such as rubik's cube?
Hello all hope everyone is doing fine.
I have a vision related problem where I want to calibrate my camera using a 3d object such as rubik's cube with known dimensions. I have a cube with 60mm length, ...
- 11
0
votes
2
answers
55
views
Fixing distortion in photographic reproductions
I am currently building a photographic setup which I intend to use to make reproductions of a large amount of transparencies(positive and negative film strips). As I will be using a fairly small (1&...
- 103
0
votes
1
answer
43
views
3D-to-3D pose estimation
Given a set of 3D points with their coordinates in 2 different coordinate systems, what is the correct algorithm to use in order to estimate the relative rotation and translation of the coordinate ...
- 11
1
vote
0
answers
70
views
How is focal length estimated?
There are a number of approaches to calibrate cameras. In this process you estimate the intrinsic parameters using a checkerboard of known size.
I'm confused on how the focal lengths are found. The ...
- 854
3
votes
0
answers
892
views
Reprojecting an image to another viewpoint using planar homography
I have an image rendered by a simulated camera in Unity. Using this image and the known (virtual) camera pose it corresponds to, I would like to render a new image from another viewpoint. Having read ...
- 429
1
vote
2
answers
758
views
Calibration using Camera Calibration Toolbox for Matlab vs OpenCV
I am currently working to calibrate a camera and I tried using both the Caltech Camera Calibration Toolbox for Matlab and OpenCV. I used the same images for both methods. Even if the error seems to ...
- 111
-1
votes
1
answer
41
views
Best targets to calibrate camera with long focusing distance
I am currently using a number of cameras with long focusing distance, i.e. >3m, and I want to calibrate them to find the intrinsic matrix.
My problem is that if I want to cover all or most of the ...
- 111
2
votes
1
answer
1k
views
How to apply rotation to extrinsic and intrinsic camera parameters post-calibration?
I currently have a set of intrinsic / extrinsic camera parameters, and am using them to project 3D world coordinates to the 2D image, using projection matrix $P = K[R | t]$.
My problem is that this ...
- 31
-1
votes
1
answer
580
views
Rotation and translation from Fundamental Matrix
I understand how to extract rotation and translation from the essential matrix.
However, I did not find anything about obtaining the rotation, translation, (and also the calibration matrix) from the ...
- 1
-1
votes
1
answer
294
views
Camera calibration using checkerboard instead of 3D calibration object
What is the purpose and advantage of using a checkerboard than a 3D calibration object for camera calibration ?
With a 3D calibration object (e.g. a transparent cuboid like a table), I can take one ...
- 1