All Questions
8
questions
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
3
votes
0
answers
814
views
Correct Fish Eye camera Radial Distortion and blurry effect at the image edges
There are a lot of questions regarding this topic ,but I am trying to get a more clear picture from these questions.
I am trying to calibrate a fish eye camera and I am using OpenCV omnidir class ...
- 131
3
votes
1
answer
265
views
How should calibration points be distributed?
I do camera calibration for a single camera with a chessboard pattern in opencv for the first time.
The focus is fixed.
I'm not sure how to do it, there seems to be many questions:
How many images ...
- 252
6
votes
1
answer
3k
views
How are the scaling parameters included (extracted from) an essential matrix?
An essential matrix relates corresponding points between two images assuming that a camera satisfies the pinhole camera model, and can be expressed as:
$$E=K'^TFK$$
where K is the calibration and F ...
user17348
5
votes
1
answer
2k
views
Obtain motion between image features by means of the homography matrix
I have been reading several really good answers about how to obtain camera pose (rotation, translation, etc), such as this one and this one, but I am not sure how this applies to my problem.
My ...
user17348
1
vote
2
answers
3k
views
How to find the actual size of an existing object from the pixels of an image?
I am quite new to vision and OpenCV, so forgive me if this is a stupid question but I have got really confused.
My aim is to detect an object in an image and estimate its actual size. Assume for now ...
- 111
9
votes
1
answer
3k
views
Is it possible to hack camera calibration without having access to the camera?
Many times we have a stream of video to process without access to camera. Having access to camera matrix would be beneficial for various processing techniques. Is it possible to hack camera ...
- 170
1
vote
1
answer
381
views
Does accurate translation estimation using a camera matrix mean the orientation estimation will also be accurate?
Pose Estimation of single camera and planar pattern:
If I have an appropriate camera matrix with intrinsic parameters that allows me to calculate translation of the camera relative to a chessboard, ...
- 91