A Public Domain System for Camera Calibration and Distortion Correction

In this report, we describe a two-stage algorithm for camera calibration using off-the-shelf TV cameras and lenses as well as a new class of separable image restoration/reconstruction algorithms for geometric distortion correction. We also describe in the report the implementation of these algorithms. While the two-stage camera calibration algorithm is aimed at efficient computation of the internal and external parameters of a camera, the new class of separable image restoration/reconstruction algorithms is, among many other applications such as image warping, intended to correct geometric distortion in terms of the parameters that characterize the camera. In addition to the calibration and restoration/reconstrtuction algorithms, we also address in the report unconstrained nonlinear optimization, which is part of the two-stage camera calibration algorithm and is useful in many other applications. 1 Introduction In this report, we describe a two-stage algorithm for camera calibration us..