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Welcome to the Camera-Calibrator wiki!

This project was performed as a part of the internship, under the guidance of Prof. Nicolas Saunier. It can be used to perform camera calibration from a traffic scene. The calibration will be valid for both RGB as well as Thermal camera.

Calibration could be subdivided into two stages : -

1. Intrinsic Calibration
2. Extrinsic Calibration

Intrinsic Calibration is mostly independent of the scene, as long as there is a motion of vehicle along the width of the image. It assumes a simplified camera model, in which focal length in horizontal and vertical directions are equal, as well as there is no skewness of pixels, and the optical center lies in the center of the image. The output from intrinsic calibration constitutes of a camera matrix and distortion coefficients.

Extrinsic Calibration will be valid only for the cameras that capture perpendicular road intersections and there is a fairly good number of vehicles in either direction. The output from extrinsic calibration constitutes of a projection matrix, which encodes the rotation of the camera with respect to ground plane, as well as the position of the camera from the center point of the image, which lies on the ground plane