Design and Implementation of DCT Accelerators in SOPC-based Embedded System for Digital Color Image Watermarking
نویسندگان
چکیده
digital watermarking techniques have been exploited to protect the copyright of multimedia data in the emerging systems. In this paper, an efficient watermarking approach for System-on-Programmable-Chip (SOPC) realization is proposed. We analyzed the software efficiency of watermark embedding with Nios-II soft-CPU and proposed a cost-effective architecture for the design of Discrete Cosine Transform (DCT) accelerator. The experimental results revealed that the proposed technique successfully improves the performance of watermarking SOPC. KeywordsSystem-on-Programmable-Chip (SOPC), Discrete Cosine Transform (DCT), digital watermarking techniques, Nios-II soft-CPU, Accelerators.
منابع مشابه
A Modified Digital Image Watermarking Scheme Based on Nonnegative Matrix Factorization
This paper presents a modified digital image watermarking method based on nonnegative matrix factorization. Firstly, host image is factorized to the product of three nonnegative matrices. Then, the centric matrix is transferred to discrete cosine transform domain. Watermark is embedded in low frequency band of this matrix and next, the reverse of the transform is computed. Finally, watermarked ...
متن کاملA Modified Digital Image Watermarking Scheme Based on Nonnegative Matrix Factorization
This paper presents a modified digital image watermarking method based on nonnegative matrix factorization. Firstly, host image is factorized to the product of three nonnegative matrices. Then, the centric matrix is transferred to discrete cosine transform domain. Watermark is embedded in low frequency band of this matrix and next, the reverse of the transform is computed. Finally, watermarked ...
متن کاملOptimum decoder for multiplicative spread spectrum image watermarking with Laplacian modeling
This paper investigates the multiplicative spread spectrum watermarking method for the image. The information bit is spreaded into middle-frequency Discrete Cosine Transform (DCT) coefficients of each block of an image using a generated pseudo-random sequence. Unlike the conventional signal modeling, we suppose that both signal and noise are distributed with Laplacian distribution, because the ...
متن کاملAn Approach towards Designing a Robust DCT based Image Watermarking Framework against JPEG Compression
Ownership authentication and copyright protection of image has achieved a sharp attention due to easy and global availability of internet services. Illegal copying and misappropriation of digital image leads cyber crime in an epidemic form. Invisible watermarking technique is one of the leading solutions towards violation of ownership authentication problem without deteriorating the quality of ...
متن کاملWatermarking Scheme Based on Multiple Chaotic Maps
a watermarking scheme for Grayscale image isproposed based on a family of the chaotic maps and discretecosine transform. Jacobian Elliptic mapis employed to encrypt ofwatermarked logo. Piecewise nonlinear chaotic map is also usedto determine the location of DCT coefficients for the watermarkembedding. The purpose of this algorithm is to improve theshortcoming of watermarking such as small key s...
متن کامل