Camera Calibration

How to calibrate the camera.
The standard camera model used in OpenCV and ROS is referred to as the Pinhole model. You can read more about it here:
The camera can be calibrated by one of the three following ways:

1.Kalibr

Kalibr is toolbox for multiple camera and sensor calibration.

2. OpenCV

Use the functions mentioned in the above link after installing and importing the OpenCV package.

3. ROS

Use the camera_calibration ROS package:
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4. MATLAB

Use the MATLAB app for camera calibration: