A STUDY OF DIGITAL WATERMARKING RECOGNITION USING ORTHOGONAL CODE SEQUENCES WITH A BACK-PROPAGATION NEURAL NETWORK

作者：Yen Chih Ta^*; Ding Ing Jr; Lai Zong Wei

来源：Transactions of the Canadian Society for Mechanical Engineering, 2013, 37(3): 459-465.

• digital watermark
• Walsh-Hadamard code
• salt-and-pepper noise
• Gaussian noise
• back-propagation neural network

Digital watermarking is an encryption technology commonly used to protect intellectual property and copyright. In this study, we restored watermarks that had already been affected by noise interference, used the Walsh-Hadamard codes as the watermark identification codes, and applied salt-and-pepper noise and Gaussian noise to destroy watermarks. First method, we used a low-pass filter and median filter to remove noise interferences. The second one, we used a back-propagation neural network algorithm to suppress noises. We removed nearly all noise and recovered the originally embedded watermarks of Walsh-Hadmard codes.

• 出版日期2013