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A new reversible data hiding algorithm with better performance of robustness is proposed in this letter. In the scheme, the original image is firstly divided into some no over-lapping sub-blocks, then Inter Waver Transform (IWT) is applied to every image sub-block, the resulting low-frequency approximate sub-band is used to hide data based on the statistical features of image, two threshold parameters...
A novel semi-fragile watermarking scheme of JPEG image in compressed domain is proposed. A chaotic map model based an authentication generating model is introduced. The DCT-transformed matrix of luminance plane in YCbCr color space is quantized by a modified quantized table. Then the low-frequency coefficients and location of each image block are used as the input of authentication generating model...
A new adaptive reversible watermarking algorithm based on wavelet lifting scheme is proposed in this letter. In the algorithm, watermarking image is embedded in the sub-band LL1 generated from 1-level wavelet lifting scheme, and the position information with small size is kept as a secret matrix, the threshold value can be adaptively selected according to the peak-signal to noise rate, such that watermarked...
In this paper, a novel blind watermarking scheme for still image based on the two-dimensional discrete wavelet transform (DWT) is proposed. In the scheme, digital watermarking with a pseudo-random sequence is derived from a full logistic map system, and the robustness is achieved by embedding every bit of watermark sequence several times in many different locations in approximate sub-band of one-level...
A new image authentication based on reversible watermarking algorithm is proposed in this paper, which first divided the original image into two parts, one part is used to extract image features, based on difference expansions, and the other part is used to embed the data extracted from itself and the first part. Experimental results show that image with embedded data can be restored completely and...
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