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We present a novel blind digital watermarking algorithm using the quantization for Jaguwen rubbing image based on Contourlet transform in this paper. After Contourlet transform, original image is decomposed into a series of multiscale, local and directional subimages. Select the low frequency subband as the watermarking embedding domain. At the same time, the original binary watermark is firstly scrambled...
A nonlinear detector is proposed for optimal DCT-domain watermark detection, which comes from a watermarking embedding algorithm based on the absolute value reordering rule of DCT coefficients. The performances of the nonlinear detector versus the linear detector, described by a measure of deflection coefficient, are evaluated in the watermark detection. Experimental results demonstrate that the proposed...
We present a blind digital watermarking algorithm using the module arithmetic and odd-even quantization based on Contourlet transform in this paper. After Contourlet transform, original image is decomposed into a series of multiscale, local and directional subimages. Select the low frequency sub-band as the watermarking embedding domain and then make module arithmetic. At the same time, the original...
In this paper a blind watermarking algorithm for digital image is presented. The proposed method operates in wavelet domain. The watermark is decomposed into 2D-IMFs(intrinsic mode functions)using BEMD (bidimensional empirical mode decomposition) which is the 2-dimensional extension of 1 dimensional empirical mode decomposition. The CDMA (code division multiple access) SS (spread spectrum) technique...
A novel digital image watermarking scheme is proposed in this paper, which embeds a digital watermark into the DCT coefficients of the host image based on human visual system (HVS), and the locations of embedding watermark are saved as key. The proposed algorithm is able to extract the watermark without requiring the original image only through utilizing independent component analysis (ICA) and the...
One of the significant problems in video watermarking is the Geometric attacks. The DWT (discrete wavelet transform) domain is used for proposed a novel algorithm to place invisible watermark in a video frame based on a three-level DWT using Haar filter. The proposed algorithm is robust against JPEG compression, geometric attacks such as Downscaling, Cropping, and Rotation. It is also robust against...
A new blind image watermarking scheme was proposed based on fast ICA and the wavelet tree structure, which featured the following characteristics as scrambling the watermark to enhance the security, taking advantage of the human visual system properties and extracting the watermark without original image. The experimental results show that the proposed blind image watermarking scheme is invisible...
In order to implement watermarking scheme for embedded systems, we present an energy efficient and robust watermarking mechanism based on DS-CDMA. The DS-CDMA based watermarking can obtain the capacity according to the orthogonal spreading codes. The high capacity can improve the robustness efficiently. For power saving, we propose a low complexity frequency domain transform for the DS-CDMA embedding...
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...
In this paper, a digital image watermarking scheme with blind detection for copyright verification is proposed. The binary watermarks are embedded in the wavelet domain of an image using the discrete wavelet packet transform (DWPT) and quantization of the selected dominant coefficients. The blind watermarking detection is employed for copyright verification. Experimental results show that the proposed...
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