Digital Holographic Watermarking Algorithm Based on DWT-DCT. (December 2020)

• Record Type: Journal Article
• Authors: Liu, Zhiyue; Wang, Anling; Xin, Kuang; Liu, Fuping; Zhu, Xiaofeng; Li, Yajing; Yu, Zichao
• Is Part Of: Journal of physics. Volume 1693(2020)
• Publication Date: 2020-12
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1693/1/012099
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: In order to improve the robustness and invisibility of watermarking, a digital holographic watermarking algorithm based on DWT-DCT is proposed. First, the watermark image is generated into a digital hologram to improve the security and non-tearability of the watermark, and the I1 image is selected as the watermark image to be embedded. Perform discrete wavelet transform on the original carrier image to extract its low-frequency coefficients; secondly, the low-frequency coefficients are subjected to DCT transformation, and finally the watermark information is embedded in the high-frequency coefficient matrix after DCT, thereby completing the watermark information embedding. This algorithm combines the transformation characteristics of DWT and DCT, makes up for each other's shortcomings, and makes digital watermarking more robust and invisible. In order to verify the anti-attack ability of this algorithm, different attack tests were performed on the watermark image. The results show that this algorithm is robust against simple linear attacks and noise attacks.