1. An image processing apparatus implemented by a computer, comprising: an image data apparatus for supplying single picture frame data corresponding to a single frame picture image; a display displaying the single frame picture image corresponding to single picture frame data; a camera parameter apparatus for determining from one of the single picture frame data and the displayed single frame picture image, camera parameters of a camera used to image the single picture frame data; and a 3-D model extracting apparatus using the camera parameters with respect to the single frame picture image, for extracting 3-D model data for at least one object from one of the single picture frame data and the displayed single frame picture image; wherein the camera parameter apparatus comprises: a designating apparatus for designating with respect to one of the single picture frame data and the displayed single frame picture image, at least two parallel perspective lines and two orthogonal lines; and a calculating apparatus for calculating, using the at least two parallel perspective lines and the two orthogonal lines, the camera parameters including a camera position, a camera line of sight direction and a focus length.