1. A method for generating an image of a seal impression, said method comprising: said processor causing irradiation of a face of a seal with N beams of light striking the face in succession from N respective different directions respectively corresponding to N different angles of incidence of the light on the face, said face having a character engraved thereon, said N at least 2; said processor acquiring N still images of the face corresponding respectively to the N beams of light striking the face in succession, each still image structured as a set of pixels such that each pixel comprises a red-green-blue (RGB) color combination; and said processor combining the N still images to generate a composite image of pixels, said combining comprising generating in the composite image a common area of pixels that commonly appears on the face of the seal in all still images of the N still images, said common area having a luminance value exceeding a specified luminance threshold, said common area including a character area pertaining to where the engraved character is located on the face of the seal.