Low-noise multiple watermarks technology based on complex double random phase encoding method

Jihong Zheng; Rongwen Lu; Liujie Sun; Songlin Zhuang

doi:10.1117/12.881230

2 December 2010 Low-noise multiple watermarks technology based on complex double random phase encoding method

Jihong Zheng, Rongwen Lu, Liujie Sun, Songlin Zhuang

Proceedings Volume 7851, Information Optics and Optical Data Storage; 78511E (2010) https://doi.org/10.1117/12.881230
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

Based on double random phase encoding method (DRPE), watermarking technology may provide a stable and robust method to protect the copyright of the printing. However, due to its linear character, DRPE exist the serious safety risk when it is attacked. In this paper, a complex coding method, which means adding the chaotic encryption based on logistic mapping before the DRPE coding, is provided and simulated. The results testify the complex method will provide better security protection for the watermarking. Furthermore, a low-noise multiple watermarking is studied, which means embedding multiple watermarks into one host printing and decrypt them with corresponding phase keys individually. The Digital simulation and mathematic analysis show that with the same total embedding weight factor, multiply watermarking will improve signal noise ratio (SNR) of the output printing image significantly. The complex multiply watermark method may provide a robust, stability, reliability copyright protection with higher quality printing image.

Citation Download Citation

Jihong Zheng, Rongwen Lu, Liujie Sun, and Songlin Zhuang "Low-noise multiple watermarks technology based on complex double random phase encoding method", Proc. SPIE 7851, Information Optics and Optical Data Storage, 78511E (2 December 2010); https://doi.org/10.1117/12.881230

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KEYWORDS

Digital watermarking

Signal to noise ratio

Image encryption

Image quality

Printing

Computer programming

Image enhancement

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