Yueh-Hong Chen

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In this paper, we propose a coevolutionary genetic watermarking scheme based on wavelet packet transform. Wavelet packet transform can be viewed as a generalization of the discrete wavelet transform, and a best wavelet basis in the sense of some cost metric can be found within a large library of permissible bases. Coevolutionary genetic algorithm is(More)
In recent years, Camera Smart phone has become a popular consumer electronics product. Young people like to use that to record their daily lives, moreover, they will share these photos and information to others. However, the photos may be used without consent after they are uploaded to Internet. To avoid this problem, one can embed visible and invisible(More)
In this paper, we propose a new algorithm in reversible data hiding, with the characteristics of ease of implementation, based on the alteration of difference values relating to original image. Three major categories can make reversible data hiding possible, one is to modify the histogram of original images, the second is to alter the difference between(More)
Digital watermarking has been a popular topic in both scientific research and applications in the last decade. Based on previous experiences for the development of watermarking algorithm in literature, there are lots of requirements that need to be considered based on the purpose for applications. Therefore, how to assess the effectiveness of the algorithm(More)
A genetic watermarking approach based on ART2 neural network is proposed in the paper. This approach uses an ART2 neural network to classify 8/spl times/8 DCT blocks of images in training sets. For each cluster, genetic algorithm (GA) is then performed to find out the optimal coefficients for watermark embedding. All the results are recorded in a table,(More)
In this paper, we propose a binary value based progressive image watermarking approach for digital right protection. First, a new binary valued watermarking method for wavelet domain images are introduced, and then a progressive watermark detecting scheme for Internet environment is introduced. Its performance was evaluated with two types of experiments (1)(More)
Wavelet packet transform can be viewed as a generalization of the discrete wavelet transform and a best wavelet basis in the sense of some cost metric can be found within a large library of permissible bases. In this paper, we proposed a genetic watermarking scheme based on the wavelet packet transform. Genetic algorithm is used to select an appropriate(More)
Reversible data hiding can be classified into two major research branches, one is by use of the histogram of original image, named the H scheme, and the other is by manipulating pixel relations between adjacent pixels, called the difference expansion (DE) scheme. Both schemes have their own advantages and drawbacks, but the inherent characteristics of(More)