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In 2010, Chen et al. proposed a data hiding scheme with high payload and good visual quality. The edge information is detected and most of the secret bits are embedded into the edge area. An index pixel is chosen to record the edge information for each block. However, the embedding space will decrease because of the index pixel. Thus, we proposed a data hiding that enhances the visual quality based...
This paper proposes a reversible visible watermarking method which are contour style. According to the fact that it has informational redundancy in a nature images usually, it is possible to embed watermarking image in the corresponding area of original image. Based on the cryptography method, users can view the original image after remove the visible watermarking by the proposed method. The proposed...
Reversible data hiding has drawn considerable attention in recent years. In this paper, we used the tictactoemidlet predictions to achieve a histogram-based reversible data hiding. The histogram is created by exploiting all difference values between pixels and their predictive values. Experimental results show that our methods are capable of providing a great embedding capacity without making noticeable...
In this paper, we develop a watermarking scheme for image authentication and verification. The watermarking scheme for tamper detection of an image is fragile and block-based. Such a scheme has good tamper localization and high tamper detection rate. The security of our scheme depends on a secret key, even though the attacker got the original watermark pattern and watermarking algorithm. The watermark...
This study presents an optimization-based image watermarking scheme by using Lagrange Principle. Unlike traditional way of single-coefficient quantization, this study uses multi-coefficients quantization to embed the watermarks. To modify the low-frequency coefficients of discrete wavelet transform (DWT), the Lagrange Principle is applied to derive an optimization-based formula. Experimental results...
This paper presents a novel data-hiding scheme based on side-match vector quantization (SMVQ). While encoding a block of an image, a traditional SMVQ data-hiding scheme only considers the neighboring pixels of the block to be encoded to produce a state codebook, and then uses the index of the closest codeword in the state codebook to represent the block. The major problem of the traditional image...
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