A Method for Data Embedding to Printed Images Based on the Use of Original Images
Takafumi Shono, Mitsuji Muneyasu, Yoshinobu Kajikawa · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2007
Data embedding to printed images has become an important issue for several applications. In this paper, we assume an original image to be known and the server based data retrieval model, and a new method for the data embedding to the printed images is proposed. To embed many number of data bits, we adopt “Walsh code” for diffusion code, which is strong to the interference between diffusion codes. This can be also applied to the improvement of the detection process and we propose the embedding of same data to three blocks. This technique gives the tolerance to some distortion and noises. In the detection processing, a taken image is forwarded to the server which holds the original image and the embedded data is detected in the server. Therefore, more accurate detection becomes possible.