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Nowadays, commercial activities on the internet and media need to be protected by increasing of security, using the 2D Barcode with a digital watermark in security field. This paper proposes that QR Code (Quick Response Code) is embedded with an invisible watermark by using Discrete-Cosine-Transform, or DCT for an information hiding (secret information) within the group through the QR Code image with...
This paper proposed LSB Information Hiding algorithm which can Lift wavelet transform image. Furthermore, made the objective evaluation of image quality by the peak signal to noise ratio and normalized cross correlation coefficient. Achieving the purpose of information hiding with the secret bits of information to replace the random noise, using the lowest plane embedding secret information to avoid...
This paper proposes a robust blind watermarking scheme for 2D-vector data used in Geographical Information Systems (GIS). The proposed method embeds two types of watermarks that complement each other into the vector data. It preserves the fidelity of the vector data using an intersection test. Simulation results show that our method is resistant to common attacks such as translations, scaling, rotation,...
Digital watermark technology of GIS vector data consists of designing the digital watermark algorithm and evaluating the digital watermark algorithm performance, also, robustness is a most important evaluation indicator of the digital watermark algorithm performance, therefore, this article focuses on evaluating the robustness of digital watermark algorithm of GIS vector data.
A novel feature locating digital watermark algorithm based on digital wavelet transform (DWT) is proposed. Points are extracted by means features of image from the low frequency sub-band of wavelet coefficients as index of locations in which watermarking information are embedded. This algorithm is suitable for blind detection. High locating precision almost do not effect by watermarking embedding...
In recent years, digital maps are used more and more widely, it plays a significant role in the national economy and defense construction, illegal duplication and distribution or forgery of the maps is also easy. Digital watermarking algorithms for vector data are an efficient method to counter such abuses of the maps. Considering the characteristic of vector geo-spatial data for digital watermarking,...
Digital watermark is an effective copyright protection method. A new robust public watermarking algorithm is proposed with the base of the method of confidence evaluation and neural network data fusion. First a special addition formula is applied to later evaluate the confidence of each extracted watermarked bit in the extraction. Then a normalization is used to accord with the approximate distortion...
This paper presents a novel scheme of watermarking of digital images for copyright protection and authentication. In this paper we proposed a method of embedding owner's speech signal. Speech being a biometric data, the watermark signal in this method is expected to be more meaningful and has closer correlation with copyright holder. The main issue of concern here is the capacity because the speech...
With the development of network and multimedia technologies, multimedia copyright protection and content authentication have become serious problems that need to be solved urgently. Digital watermarking technology provides a strong solution for it. DWT and DCT are two most popular tools used in watermarking algorithm. With the increasing use of SVD, the digital watermarking technology in transform...
Watermarking 3D meshes is very important in many areas of activity including digital cinematography, virtual reality as well as in CAD design. Due to the complexity of 3D meshes, mesh watermarking schemes are far from the maturity of watermarking algorithms dedicated to audio, image or video watermarking. No existing scheme is robust against all attacks. To verify a good trade-off between invisibility...
Considering the watermark as a noise, a watermark extraction model is proposed in this paper to enhance the correlation of Digimarc plug-ins in photoshop. First, an estimation of the original image for a watermarked image is obtained by TV (total variation) denoising model based on the partial differential equation. Second, watermark noise information is obtained by subtraction between the watermarked...
In this paper, a wavelet digital watermarking algorithm based on human visual system and watermarking capacity analysis was proposed. Firstly, watermark was scrambled through Arnold transform. Then, the frequency, texture and luminance masking factor of the improvement just noticed difference threshold model can be exploited to compute the watermark embedding intension in wavelet domain. And, with...
This paper presents a novel blind video watermarking method based on image complexion analysis. The image complexion information is extracted from the DC coefficient in sub blocks transformed by discrete cosine transform (DCT) to make sure the macroblock of image adapt to be embedded watermark information. Subsequently, the algorithm presents DCT coefficients space layered mode (DCSLM), and embeds...
Nowadays, the transmission of digitized medical information has become very convenient due to the generality of Internet. Internet has created the biggest benefit to achieve the transmission of patient information efficiently. However, it is easier that the hackers can grab or duplicate the digitized information on the Internet. This will cause the following problems of medical security and copyright...
Digital watermarking is an efficient and promising approach to protect intellectual property rights of digital media. In this paper, a new scheme of robust audio watermarking based on Fractional Fourier transform (FRFT) domain for copyright protection is proposed, which utilizes the idea that FRFT can be considered as a rotation in time-frequency joint domain. Test results for imperceptibility of...
A wavelet based robust image watermarking scheme in which a binary image is embedded in the horizontal and vertical quadrants of a wavelet transformed image is proposed. The algorithm exploits the inter-coefficients relationship within a DWT block of a predetermined size. Only one wavelet coefficient is perturbed slightly in order to embed a single bit of the watermark and also to produce a watermarked...
A novel watermarking method using singular value decomposition (SVD) is presented in this paper. In this algorithm, a 3D model is taken as a model that consists of triangular meshes, and we select some triangles called independent triangles set (ITS) to generate a Hankel matrix and apply SVD on it, then watermarks are embedded through modulating singular values. The watermarks that embedded by this...
In this paper, we proposed an Binary Image Watermarking Algorithm Based on SVD and used AES algorithm with KEY, because this type of watermark has stronger impact during the copyright reclamation moment, compared with the use of a pseudo random pattern generated by a secret key as watermark code. The proposed algorithm is evaluated from the transparency point of view and the robustness against some...
An improved information hiding method based on the spectrum spreading was proposed in this paper. Spreading the spectrum and mapping the information before hiding, then embedding them as errors at the adjacent of the bar and the space according to the allowance errors between the bars and spaces by fine tuning the width. Theoretical analysis and experimental results showed that this algorithm have...
This paper presents a novel, principled approach to resolve the remained problems of substitution technique of audio watermarking. Using the proposed genetic algorithm, message bits are embedded into multiple, vague and higher LSB layers, resulting in increased robustness. The robustness specially would be increased against those intentional attacks which try to reveal the hidden message and also...
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