Abstract
When we use a stereo camera system, we have to calibrate each camera using the pattern whose 3-dimension structure is known. In this case, some points which are extracted as a feature point from an image plane of each camera are related to the points of another camera. But feature points are not always extracted stably. Therefore some points must be corrected by hand. This has made it difficult to calibrate a stereo camera system automatically. To solve this problem, we developed an automatic camera calibration method with minization of variance of brightness value of a disparity map.
