| 摘要 |
PROBLEM TO BE SOLVED: To precisely decide an inner parameter by correcting a plurality of image signals stored, based on a calculated lens distortion center and lens distortion quantity and deciding the internal parameters of a camera based on a plurality of corrected image signals. SOLUTION: A processing unit 20 sets the reference position of a camera 10 based on the positions of the camera 10 and a lattice point, stores an image signal obtained by photographing the lattice point from the camera 10 which is set in the reference position, measures the coordinates of the lattice point based on the stored image signal and calculates lens distortion quantity. The processing unit 20 and an X-stage 16a move the camera to a forward direction or a backward direction from the reference position, which is set and stores a plurality of image signals obtained by photographing. The processing unit 20 corrects a plurality of stored image signals based on three calculated lens distortion center and lens distortion quantity and decides the internal parameter of the camera 10, based on a plurality of corrected image signals. |
