Stack Overflow
Stack Overflow

Questions tagged [calibration]

Use this tag for questions related to the process of adjusting the output or indication on a measurement instrument.

443 questions
0
votes
1 answer

cv2.stereocalibrate() error about "cameraMatrix" not being a numerical tuple

I'm working on estimating distance from stereo cameras. I am using python 2.7.11 and OpenCV 3.1 versions.I calibrated every camera separately and found intrinsic parameters. the problem is that when I use cv2.stereocalibtare() function in the way…
Masood Saber
  • 53
  • 9
0
votes
1 answer

How to centre media on Zebra QLN220 printers

The media Im printing on is 40mm and the Zebra QLN220 is set to 48mm which means some of the text is cut off how do i adjust this? Thanks
DJT-THS
  • 1
  • 1
0
votes
1 answer

How can I correctly apply the scalar calibration of vector magnetometers?

I need to calibrate a magnetometer using the method of Merayo with matlab. I have found this code: But I do not understand how I apply this technique. I fact I have the magnetic Data distorted, I apply the Magnetic Calibration. [U,c] =…
dou
  • 293
  • 2
  • 3
  • 14
0
votes
1 answer

How can I calibrate a camera with a fixed focus set up for long focal range?

I have a PointGrey BlackFly with a manually-adjusted lens set suspended 5m high, viewing targets up to 12m away laterally - approximately 13m distance to target. Can you suggest a good method to calibrate this camera? I have MatLab available, but…
WillC
  • 957
  • 16
  • 19
0
votes
0 answers

Raspberry pi official 7 inch toucshcreen wrong calibration when autoboot python script

I have created a game with python and pygame and it runs on startup, in fullscreen mode, on an official Raspberry Pi 7 inch touchscreen. The problem is that the mouse position does not correspond with my finger touches. It is as if the calibration…
Arne Thiels
  • 9
  • 1
0
votes
1 answer

How can I investigate failing calibration on Spartan 6 MIG DDR

I’m having problems with a Spartan 6 (XC6SLX16-2CSG225I) and DDR (IS43R86400D) memory interface on some custom hardware. I've tried on a SP601 dev board and all works as expected. Using the example project, when I enable soft_calibration, it never…
Shane
  • 249
  • 1
  • 3
  • 10
0
votes
0 answers

Android microphone calibration for audio recordings.

In my project, I have to calibrate the android phone's microphone to do some recordings and perform analysis. With different phones I get different values of recording parameter measured in dB. import android.media.MediaRecorder; import…
Aditya
  • 1,172
  • 11
  • 32
0
votes
0 answers

"Equalise" one data set into another data set using neural network

I have two non-linear curves as shown below: The Blue solid curve is the current sensor data I am getting with respect to time. The red dashed function is the data from the gold standard. Its more of a calibration/regression problem. I want to…
Arjit Kapoor
  • 47
  • 9
0
votes
1 answer

How can I calibrate the accelerometer?

I'm using the accelerometer to move an object on my screen. It's only working when the iphone is flat. If I use the iPhone in another position, the object is not moving like I want (the Y axis is not well managed). So, I've to calibrate the position…
ALpesH
  • 23
  • 2
  • 7
0
votes
1 answer

Why ECU Calibration Required

Why ECU Calibration is required in Software Development and testing? Example would be nice to understand
Uday Sharma
  • 1
  • 2
0
votes
1 answer

no suitable conversion function from "CvTermCriteria" to "int" exists

How could I solve the error? I use program that made for OpenCV 2.x but I compile it on OpenCV 3.0, and error appeared. I change CvTermCriteria to TermCriteria::TermCriteria but thats not working. How could I change CvTermCriteria to be int? Hope…
Lina Khoirunisya
  • 95
  • 1
  • 10
0
votes
0 answers

Lens correction in Matlab

With camera calibration Toolbox in MATLAB, it looks like it corrects the lens distortion only for images that had checkerboards... I did the training part to get the camera parameters from a data set of images with checkerboard with camera…
user3288977
  • 37
  • 7
0
votes
2 answers

OpenCV C++ Stereo Calib Example

I want to run the OpenCv Stereo Calib sample. But I have a error message like "0 pairs have been successfully detected. Error: too little pairs to run the calibration " I created a folder under data folder. It's name is Stereo. And there is a pair…
zegufe
  • 1
  • 1
0
votes
1 answer

x-IMU Hard-iron calibration Values too big for Register

I am using a x-IMU from x-io Technologies. For drift correction it uses the AHRS On-board algorithm. Without Hard-iron calibration there is a small continuous rotation. From Hard-iron calibration with x-IMU-GUI-v13.1 I get values like: x-axis…
MagnusH
  • 1
  • 2
0
votes
1 answer

Check and enable Magnetic sensor calibration in Android

I'm using Magnetic Sensor calibration in my Android app to implement Augmented reality. When the app is used for a long time, the sensor calibration is reduced gradually. Is there any way to check the calibration and automatically enable or prompt…
Jas
  • 3,207
  • 2
  • 15
  • 45
1 2 3
…
29 30