Patent ID: 8320706

Claim:
A method of tagging a photograph with information, which calculates a shooting position of an input image from reference images having shooting position information to tag the shooting position information, the method comprising: selecting a plurality of reference images; calculating a relative shooting position of the input image to shooting positions of the reference images, wherein the calculating comprising: calculating rotation matrices and translation vectors between the reference images and the input image; designating a shooting position among the reference images as a reference point in a reference coordinate system; rotating and translating the reference point by using the rotation matrices and the translation vectors; and forming a triangle by using the rotated two points and the reference point, wherein the rotation matrices and the translation vectors are a rotation matrix and a translation vector between the reference image that serves as the reference point and the input image and a rotation matrix and a translation vector between the reference images; and calculating the shooting position of the input image based on the calculated relative shooting position of the input image; and storing the shooting position and shooting direction information on the input image in an exchangeable image file format (EXIF) tag of the input image.