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Questions tagged [camera-calibration]

In Computer Vision, camera-calibration is the process of finding the true parameters of the camera that produced a given photograph or video. Usually, the camera parameters are represented in a 3 × 4 matrix called the camera matrix.

Usually we say a camera is calibrated when we know the Intrinsic Parameters.

Source: Wikipedia

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How to solve ImportError: cannot import name splitfn in python

i have write code to calibrate camera in my calibrate.py file,but when i run that file it shows error like, ImportError: cannot import name splitfn ..so how to solve this?...i have run this file using this command: sudo python calibrate.py…
snehal desai
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Why code is not giving proper results Matlab?

I know this type of questions may have been answered before but i am a beginner in matlab so please bear my kiddy questions. I wan to generate a 11*12 matrix from a set of values. i have five different vectors named X,Y Z,u,v. my code…
Rafay Zia Mir
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Need of Extrinsic parameter Camera calibration tips

I am new to camera calibration (Extrinsic Parameters)..please give clear idea how to start with extrinsic parameters computation. I really need some answers.. am in critical position.
ganesh
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Advise for camera buying

I am intending to buy a camera for my research about robotics. I am relatively new if I am ashamed to say that I am absolutely new to CV. My job is detecting an objects and return the [x,y,z] coordinate. My platform is Ubuntu 12.04 and I intend to…
PhuongHoang
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selecting 3D world points to process a camera calibration

I have 2 images for the same object from different views. I want to form a camera calibration, but from what I read so far I need to have a 3D world points to get the camera matrix. I am stuck at this step, who can explain it to me
sasa
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How can I find camera pose from matlab calibration?

As far as I know the Caltech Matlab toolbox gives the internal camera parameters (focal length, principle point,...) and camera matrix. As external camera parameters it gives the transformation matrices for each image used in the calibration…
Omda Timo
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image calibration manually with transformation matrices from OpenCV

I need to understand that how calibration works for cameras. I do not have basics good enough. Can someone please help me in understanding that how can I apply calibration data to an image taken with a camera for which I already have the calibration…
SumitM
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dense 3D reconstruction having camera matrix

I have to do 3D reconstruction from 2D images. My teacher told me that the first step is to get the camera matrix, by taking some pictures to a chessboard. I have already these photos and I am using OpenCV to get the camera matrix. The matrix has…
user3080294
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Field of view for a fisheye camera

I would like to know a general formula which relates the field-of-view (FoV) to the size of an image and focal length. The FoV formula for standard cameras is (see e.g. here) where f is the focal length. That formula can be derived from the…
PabloVD
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Do fundamental matrix and essential matrix change with different photos?

I calibrated 2 cameras as stereo system and found fundamental and essential matrix. To do it I used chessboard pattern. It's interesting to know if they are the same for these 2 cameras if I will take different photos (not chessboard)?
king sosolom
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How to use the KITTI 3D object detection methods in our own camera-LiDAR setup, where we have only one calibration set?

I am working on real-time 3D object detection for an autonomous ground vehicle. The sensors that I use is a monocular camera and a VLP16 LiDAR. For extrinsic camera-LiDAR calibration and sensor fusion, I used the Autoware camera-LiDAR calibration…
Ram Padhy
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How to fix "TypeError: function takes exactly 2 arguments (3 given)" in cv2.calibrateCamera method

I have a problem with the code below. After compilation, the message "ret, mtx, dist, rvecs, tvecs = cv2.calibrateCamera (objectpoints, framepoints, fsize, None, None) appears TypeError: function takes exactly 2 arguments (3 given) ". I want the…
sto0osik
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Android unified photo quality

I am using android camera API to take pictures. But I know very little about cameras and taking pictures in general, so I am having quite a hard time. Currenly I am able to take pictures, but the quality differes on different devices. That is a…
Dawid Grajewski
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Simple Web Cam Mouse

Object:- How can I implement web cam mouse using visible light. Details:- there will be a web cam seeing my right hand in visible light as follows i.stack.imgur.com/6ztqf.jpg :- I want to make a system where I will control the mouse pointer with my…
Hacklavya
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MATLAB - What are the units of Matlab Camera Calibration Toolbox

When showing the extrinsic parameters of calibration (the 3D model including the camera position and the position of the calibration checkerboards), the toolbox does not include units for the axes. It seemed logical to assume that they are in mm,…
blaughli
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