calibration Questions
2
I am using cv2 findChessBoardCorners for camera calibration in a vision application. My call to the function looks like this:
def auto_detect_checkerboard(self, image):
retval, corners = cv2.findC...
Barr asked 16/2, 2021 at 13:46
1
Solved
Hi all I am having trouble understanding how to use the output of sklearn.calibration.CalibratedClassifierCV.
I have calibrated my binary classifier using this method, and results are greatly impro...
Orin asked 3/12, 2021 at 8:50
0
I am using PySpark to implement a Churn classification model for a business problem and the dataset I have is imbalanced. So when I train the model, I randomly select a dataset with equal numbers o...
Fritz asked 27/9, 2020 at 10:1
2
Solved
For a quantification project, I am in need of colour corrected images which produce the same result over and over again irrespective of lighting conditions.
Every image includes a X-Rite color-chec...
Embrocation asked 20/7, 2020 at 10:25
0
Is there a way in Flutter Dart to calibrate the sensors of a mobile phone?
In my case I need the compass sensor. This is because I am developing an app with the help of one of the Flutter compass...
Quetzal asked 2/4, 2020 at 10:7
1
Solved
I working with other dataset (no kitti), but I need to convert it in kitti dataset format. I can't understand how calibration matrices were calculated in kitti. Example:
camera 2 (P2) calibration ...
Selective asked 18/11, 2019 at 15:59
2
Solved
It is my first post on Stack so I'm sorry in advance for my clumsiness. Please let me know if I can improve my question anyway.
► What I want to achieve (in a long term):
I try to manipulate my U...
Natalia asked 7/5, 2017 at 22:39
6
Solved
I was looking into implementing an Inertial Navigation System for an Android phone, which I realise is hard given the accelerometer accuracy, and constant fluctuation of readings.
To start with, I...
Gwenny asked 19/10, 2011 at 22:40
6
Solved
I'm using a wide-angle lens (178º Diagonal FOV ) and I'm trying to calibrate it properly using Opencv Calibration module. All the detection and calibration process are working fine, but the result ...
Manic asked 21/11, 2013 at 13:13
4
Solved
I know the default OpenCV Calibration systems model a Pinhole camera, but I'm working with a system using extremely wide FOV lens (187-degrees). If there any existing way to do this in OpenCV, or t...
Corposant asked 22/10, 2012 at 14:26
2
Solved
I'm trying to get the 3D coordinates and orientation of an object from its projection onto an image with a single camera with openCV.
I have been reading and the steps to follow are: calibrating th...
Akiko asked 17/9, 2017 at 8:57
4
Solved
As an user of a mechanical compass, I noticed that the heading that the magnetometer delivers, is often off by 45 degrees or more, although the calibration display did not appear in that cases.
If...
Georganngeorge asked 23/2, 2013 at 0:57
2
I have a camera and a 3D object, I have calculated the camera matrix as given in this. The image captured using the camera is having size 1600x1200. But in the camera matrix I am not getting the va...
Catfish asked 14/7, 2016 at 5:19
2
Recently, I have been studying the pinhole camera model, but I was confused with the model provided by OpenCV and the "Multiple View geometry in computer vision" textbook.
I know that the followi...
Em asked 8/4, 2014 at 13:23
3
Solved
So, I've been struggling with this problem for some time, and haven't had any luck tapping the wisdom of the internets and related SO posts on the subject.
I am writing an Android app that uses th...
Anzac asked 1/2, 2011 at 23:35
1
I'm trying to determine the distance between two object by using OpenCV 2.3.1 with two cameras but can't calculate the object's objectPoints (OCV 2.3.1, MSVC++, Windows 7). I think this is because ...
Tips asked 4/5, 2012 at 13:15
2
I am trying to calibrate a camera using a checkerboard by the well known Zhang's method followed by bundle adjustment, which is available in both Matlab and OpenCV. There are a lot of empirical gui...
Casi asked 30/6, 2015 at 8:26
2
Solved
I'm creating a web application for displaying ECGs, which are conventionally drawn at fixed scales (10 mm/mV and 25 mm/s) on a 5mm square grid. It's important to use the correct size, because reade...
Pituitary asked 12/12, 2012 at 23:43
6
Solved
I"m using a Thermal camera for a project and I'm a little stumped so as to how to think about calculating intrinsics for it. The usual camera's would determine different points on a chessboard or s...
Farron asked 27/4, 2011 at 5:30
1
Solved
I have fit a LOESS local regression to some data and I want to be able to find the X value associated with a given Y value.
plot(cars, main = "Stopping Distance versus Speed")
car_loess <- loe...
Disgorge asked 30/5, 2014 at 14:52
1
Solved
I have a python script that uses the calibratecamera2 method to calibrate a camera from a few views of a checker board. After a successful calibration I go after all original points and do some plo...
Haematin asked 21/5, 2014 at 10:51
1
Solved
I'm getting a little bit confused here.
How does Kinect calculates depth: What I understand is that
The IR projector throws out a pattern which is reflected back and read by the IR camera.
Now t...
Briefcase asked 11/4, 2014 at 16:46
1
Solved
I'm currently developing an iPhone App (on iPhone 5, iOS 7, Xcode 5) which requires a very accurate determination of the current attitude. The "attitude" of CMDeviceMotion does not fulfil these req...
Stoops asked 16/12, 2013 at 19:36
1
I have been using a Samsung Galaxy S3 to work on an app that uses the barometer estimate the user's altitude. I use SensorManager.getAltitude(p0, p), and set p0 equal to the sea-level pressure repo...
Kumquat asked 26/7, 2013 at 2:6
2
Solved
How can we know the camera sensor size from the calibration matrix?
I already have the calibration matrix. But the focal length is in pixels form.
Jerrybuilt asked 6/6, 2013 at 2:38
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