Redundant Wavelet Watermarking using Spread Spectrum Modulation
نویسندگان
چکیده
منابع مشابه
Redundant Wavelet Watermarking using Spread Spectrum Modulation
Spread Spectrum modulation has become a preferred paradigm in many watermarking applications. This paper analyzes the performance of such a blind watermarking scheme under discrete wavelet frame rather than a traditional orthonormal wavelet expansion. The over complete representation offered by the redundant frame facilitates the identification of significant image features via a simple correla...
متن کاملSpatial image watermarking using spread spectrum modulation
The paper presents low cost spatial image watermarking scheme where inherent anti jamming and interference rejection property of spread spectrum modulation is utilized to provide robustness against image distortions and malicious attempts to remove or tamper with the watermark. The use of error correction code allows a trade-off between degree of robustness and embedding rate for a given attack...
متن کاملFully Robust Spread Spectrum Wavelet Watermarking System
Existing spread spectrum based watermarking techniques can not despread the encoded signal as expected in a typical spread spectrum communication system. Also the change in the statistics of the watermarked image as a result of attacks are not adequately compensated. It is therefore expected that these systems have not yielded the desired fully robust characteristics. This paper presents a spre...
متن کاملevaluation of spread spectrum watermarking schemes in the wavelet domain using hvs characteristics
in this paper, we introduce a multiresolution watermarking method for copyright protection of digital images. the method is based on the discrete wavelet transform. a noise type gaussian sequence is used as watermark. to embed the watermark robustly and imperceptibly, watermark components are added to the significant coefficients of each selected subband by considering the human visual system (...
متن کاملA Second Order Spread Spectrum Modulation Scheme for Wavelet Based Low Error Probability Digital Image Watermarking
The goal of this paper is to introduce an integrated second order approach in using spread spectrum modulation techniques and the wavelet methodology in modeling low error probability digital image watermarking. The combination of FEC, Modulation Schemes, Multiplexing and Multiple Access techniques constitute the stage of channel coding. The approach adopted here for embedding the watermark is ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ELCVIA Electronic Letters on Computer Vision and Image Analysis
سال: 2008
ISSN: 1577-5097
DOI: 10.5565/rev/elcvia.267