Open AccessDigital Holographic Watermarking Algorithm Based on DWT-DCT
Author(s) -
Zhiyue Liu,
AnLing Wang,
Kuang Xin,
Fuping Liu,
Xiaoyan Zhu,
Yajing Li,
Zichao Yu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1693/1/012099
Subject(s) - digital watermarking , watermark , discrete cosine transform , algorithm , artificial intelligence , computer vision , computer science , robustness (evolution) , discrete wavelet transform , transformation (genetics) , invisibility , wavelet , mathematics , image (mathematics) , wavelet transform , biochemistry , chemistry , gene
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.