Patent Document ID: 6101288
Application ID: 08901689
Patent Status: 1

Claim One:
1. A computerized method for recovering a set of radial distortion parameters from a single image of a scene taken by a camera: selecting arbitrarily oriented lines in a projected image of said scene using an input device, said lines corresponding to features that are known to be linear in said scene; and minimizing objective functions describing the lines using a least-squares fit formulation to recover the set of radial distortion parameters; wherein the lines are selected by drawn snakes, the single image is blurred before minimizing the objective functions and the method further comprises the steps of determining a nearest detectable edge for each snake, moving the snakes to follow the nearest detected edge, and then determining least squares fit for the moved snakes, the movement of the snakes depending upon each other and being subject to a global radial distortion constraint.