Calibrating cameras with different resolutions

1. Is camera calibration necessary?
2. What is calibrating a camera?

Is camera calibration necessary?

The camera calibration aims to determine the geometric parameters of the image formation process [1]. This is a crucial step in many computer vision applications especially when metric information about the scene is required.

What is calibrating a camera?

Camera calibration is the process of calculating the extrinsic and intrinsic properties of a camera. After calibrating a camera, the picture information can be utilized to extract 3-D information from 2-D photographs. Images taken with a fisheye camera can also be distortion-free.