Patent ID: 6980829

Claim:
A portable terminal system comprising: a portable terminal provided with a camera inside or outside thereof, the camera being able to take a still image; and an image processor performing wireless communication with the portable terminal through a predetermined base station, wherein the portable terminal comprises: holding means for holding the still image taken by using the camera; and wireless communication means for wirelessly transmitting the still image held by the holding means to the predetermined base station, and wherein the image processor comprises: receiving means for receiving the still image through the predetermined base station; an image correcting means for performing a predetermined image correction to the still image based on part of the still image received by the receiving means; extracting means for extracting a digital watermark embedded in the still image received by the receiving means, the digital watermark being visually imperceptible, the extracting means extracting the existence and contents of the digital watermark from the still image after the image is corrected by the image correcting means; and returning means for returning additional information according to the digital watermark extracted by the extracting means to the predetermined base station, wherein the portable terminal receives the additional information through the predetermined base station by using the wireless communication means so as to hold the additional information in the holding means.