Journal ArticleDOI
An Efficient Watermarking Method Based on Significant Difference of Wavelet Coefficient Quantization
Reads0
Chats0
TLDR
The experimental results show that the proposed blind watermarking algorithm is quite effective against JPEG compression, low-pass filtering, and Gaussian noise; the PSNR value of a watermarked image is greater than 40 dB.Abstract:
This paper proposes a blind watermarking algorithm based on the significant difference of wavelet coefficient quantization for copyright protection. Every seven nonoverlap wavelet coefficients of the host image are grouped into a block. The largest two coefficients in a block are called significant coefficients in this paper and their difference is called significant difference. We quantized the local maximum wavelet coefficient in a block by comparing the significant difference value in a block with the average significant difference value in all blocks. The maximum wavelet coefficients are so quantized that their significant difference between watermark bit 0 and watermark bit 1 exhibits a large energy difference which can be used for watermark extraction. During the extraction, an adaptive threshold value is designed to extract the watermark from the watermarked image under different attacks. We compare the adaptive threshold value to the significant difference which was quantized in a block to determine the watermark bit. The experimental results show that the proposed method is quite effective against JPEG compression, low-pass filtering, and Gaussian noise; the PSNR value of a watermarked image is greater than 40 dB.read more
Citations
More filters
Journal ArticleDOI
Hybrid technique for robust and imperceptible multiple watermarking using medical images
TL;DR: This paper presents a secure multiple watermarking method based on discrete wavelet transform (DWT), discrete cosine transforms (DCT) and singular value decomposition (SVD) and the technique is found to be robust against the Checkmark attacks.
Journal ArticleDOI
Improved hybrid algorithm for robust and imperceptible multiple watermarking using digital images
TL;DR: The method has been extensively tested and analyzed against known attacks and is found to be giving superior performance for robustness, capacity and reduced storage and bandwidth requirements compared to reported techniques suggested by other authors.
Journal ArticleDOI
A Blind Watermarking Scheme Using New Nontensor Product Wavelet Filter Banks
TL;DR: This paper utilizes special symmetric matrices to construct the new nontensor product wavelet filter banks, which can capture the singularities in all directions and proposes a modified significant difference watermarking algorithm.
Journal ArticleDOI
Robust Coverless Image Steganography Based on DCT and LDA Topic Classification
Xiang Zhang,Fei Peng,Min Long +2 more
TL;DR: The proposed algorithm based on discrete cosine transform and latent dirichlet allocation (LDA) topic classification has better robustness against common image processing and better ability to resist steganalysis compared with the existing coverless image steganography algorithms.
Journal ArticleDOI
Video steganography: a comprehensive review
TL;DR: This paper intends to provide an up-to-date comprehensive review on the various video steganographic methods found in the literature in the last 5 years, and some relevant attacks and steganalysis techniques are surveyed.
References
More filters
Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.
Journal ArticleDOI
Embedded image coding using zerotrees of wavelet coefficients
TL;DR: The embedded zerotree wavelet algorithm (EZW) is a simple, yet remarkably effective, image compression algorithm, having the property that the bits in the bit stream are generated in order of importance, yielding a fully embedded code.
Journal ArticleDOI
Theory of Spread-Spectrum Communications--A Tutorial
TL;DR: It is the intention of this paper to provide a tutorial treatment of the theory of spread-spectrum communications, including a discussion on the applications referred to, on the properties of common spreading sequences, and on techniques that can be used for acquisition and tracking.
Journal ArticleDOI
Image-adaptive watermarking using visual models
C.I. Podilchuk,Wenjun Zeng +1 more
TL;DR: This work proposes perceptually based watermarking schemes in two frameworks: the block-based discrete cosine transform and multiresolution wavelet framework and discusses the merits of each one, which are shown to provide very good results both in terms of image transparency and robustness.
Proceedings ArticleDOI
Secure spread spectrum watermarking for images, audio and video
TL;DR: The watermark can be constructed to make counterfeiting almost impossible, and the same digital watermarking algorithm can be applied to all three media under consideration with only minor modifications, making it especially appropriate for multimedia products.