1. An information processing method of setting one of an internal parameter and an external parameter of a camera, comprising: acquiring a picked-up image obtained by picking up a calibration pattern in which black pattern elements and black-and-white pattern elements are arranged on a plane using the camera, each of the black pattern elements having a dark closed area in a bright background area, each of the black-and-white pattern elements having a dark closed area and a bright closed area inside the dark closed area; obtaining a black continuation area and a white continuation area by quantizing the picked-up image; judging the black pattern elements and the black-and-white pattern elements in the picked-up image based on the black continuation area and the white continuation area which are obtained; and setting one of the internal parameter and the external parameter by associating the pattern elements in the picked-up image with the pattern elements in a space based on an arrangement relationship between the black pattern elements and the black-and-white pattern elements which are judged.