A Novel Image Watermarking Method Based on Singular Value Decomposition and Digital Holography

被引:0
|
作者
Cai Zhishan [1 ,2 ]
机构
[1] Quanzhou Normal Univ, Coll Phys & Informat Engn, Quanzhou 362000, Fujian, Peoples R China
[2] Key Lab Informat Funct Mat Fujian Higher Educ, Quanzhou 362000, Fujian, Peoples R China
关键词
digital watermarking; singular value decomposition; digital holography; Fourier transform;
D O I
10.1117/12.2246593
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
According to the information optics theory, a novel watermarking method based on Fourier-transformed digital holography and singular value decomposition (SVD) is proposed in this paper. First of all, a watermark image is converted to a digital hologram using the Fourier transform. After that, the original image is divided into many non-overlapping blocks. All the blocks and the hologram are decomposed using SVD. The singular value components of the hologram are then embedded into the singular value components of each block using an addition principle. Finally, SVD inverse transformation is carried out on the blocks and hologram to generate the watermarked image. The watermark information embedded in each block is extracted at first when the watermark is extracted. After that, an averaging operation is carried out on the extracted information to generate the final watermark information. Finally, the algorithm is simulated. Furthermore, to test the encrypted image's resistance performance against attacks, various attack tests are carried out. The results show that the proposed algorithm has very good robustness against noise interference, image cut, compression, brightness stretching, etc. In particular, when the image is rotated by a large angle, the watermark information can still be extracted correctly.
引用
收藏
页数:10
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