A New Scheme for Digital Watermarking of Color Image Based on DCT and (2, 2) Visual Cryptography
Authors: 
Simeng Liu, Fuwei Wang, Weimin WangAuthors Info & Claims
Pages 238 - 243
Abstract
Digital watermarking is a very effective technology in digital copyright protection. To improve the security and robustness of digital watermarking technology, a new color image digital watermarking scheme based on visual cryptography and DCT is proposed. Firstly, the watermark is preprocessed by the (2, 2) visual cryptography, in which pixel expansion is 2, and two shared images are obtained, and one of them is used as the watermark information to be embedded in the carrier image. Secondly, the carrier image is divided into 8×8 blocks, then discrete cosine transform is performed, and then the watermark information is embedded in the medium frequency coefficients of the DCT domain by the additive embedding method according to a certain principle. When verifying copyright information, just stack and reduce the extracted image with another shared image, without requiring a lot of calculation and complex cryptography knowledge. Experiments show that this scheme is not only secretive, the watermark information cannot be detected, it can meet the needs of copyright protection, but also has high security and strong robustness. The watermark information cannot be restored by any attack method that does not meet the recovery conditions; It can against many common attacks such as white noise, Gaussian noise, salt and pepper noise, speckle noise, median filter, Gaussian low-pass filter, JPEG compression and so on. Therefore the proposed scheme is effective, and the overall performance is good.
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Index Terms
- A New Scheme for Digital Watermarking of Color Image Based on DCT and (2, 2) Visual Cryptography
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Published In
April 2023
296 pages
ISBN:9798400707544
DOI:10.1145/3616901
Copyright © 2023 ACM.
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Published: 05 March 2024
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FAIML 2023
FAIML 2023: 2023 International Conference on Frontiers of Artificial Intelligence and Machine Learning
April 14 - 16, 2023
Beijing, China
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