Image distortion correction program, an image distortion correction apparatus, an image distortion correction method, and a recording medium storing the image distortion correction program

From the image captured the paper surface by imaging apparatus, the paper content as a clue, extracts the projection set of geodesic was parallel to one another on paper curved surface, ruled surface corresponding to the sheet-form surface from the projection set of geodesic extracting the projection set of ruled lines forming the. Then, to estimate the paper curved from the projection set of geodesic and ruled lines, it corrects the distortion of the image based on the paper surface. Thus, it becomes possible for the type of diverse distortion, even when not appearing only part of the paper to the image can be performed distortion correction.