TY - GEN
T1 - Image watermarking algorithms with synchronization mechanism using self-synchronization decoding and feature points
AU - Takahara, Keita
AU - Yamaguchi, Kazuhiko
AU - Nakano-Miyatake, Mariko
AU - Pérez-Meana, Héctor
PY - 2010
Y1 - 2010
N2 - In this paper we propose two image watermarking algorithms, which are robust to cropping operation using self-synchronization mechanism. In both algorithms, the watermark sequence is firstly encoded by non-cyclic Low Density Parity Check Codes (LDPC) and then it is embedded into the block-wised Discrete Cosine Transform (DCT) coefficients using the Quantization Index Modulation (QIM) algorithm. in the watermark extraction process, the first algorithm extracts the watermark sequence using self-synchronization of sum-product decoding. While the second one firstly extracts some synchronization code embedded previously in the regions centered by feature points of the image, and using them block segmentation starting position can be calculated. The desirable performance of both algorithms about the watermark imperceptibility and robustness against cropping attack with different cropping rate is shown, together with computer complexity.
AB - In this paper we propose two image watermarking algorithms, which are robust to cropping operation using self-synchronization mechanism. In both algorithms, the watermark sequence is firstly encoded by non-cyclic Low Density Parity Check Codes (LDPC) and then it is embedded into the block-wised Discrete Cosine Transform (DCT) coefficients using the Quantization Index Modulation (QIM) algorithm. in the watermark extraction process, the first algorithm extracts the watermark sequence using self-synchronization of sum-product decoding. While the second one firstly extracts some synchronization code embedded previously in the regions centered by feature points of the image, and using them block segmentation starting position can be calculated. The desirable performance of both algorithms about the watermark imperceptibility and robustness against cropping attack with different cropping rate is shown, together with computer complexity.
KW - Low density parity check codes
KW - Quantization index modulation
KW - Sun-product decoding
KW - Watermarking
UR - http://www.scopus.com/inward/record.url?scp=79951620872&partnerID=8YFLogxK
U2 - 10.1109/CERMA.2010.63
DO - 10.1109/CERMA.2010.63
M3 - Contribución a la conferencia
AN - SCOPUS:79951620872
SN - 9780769542041
T3 - Proceedings - 2010 IEEE Electronics, Robotics and Automotive Mechanics Conference, CERMA 2010
SP - 515
EP - 519
BT - Proceedings - 2010 IEEE Electronics, Robotics and Automotive Mechanics Conference, CERMA 2010
T2 - 2010 7th IEEE Electronics, Robotics and Automotive Mechanics Conference, CERMA 2010
Y2 - 28 September 2010 through 1 October 2010
ER -