Sequence Watermark Detection Based on Frequency Discrimination
نویسندگان
چکیده
The robustness against geometrical attacks remains one of the most challenging issues in watermarking of images and video. This paper presents an improvement of the video watermarking approach presented in [1], namely by using an amplitude-limiting filter and a high-pass filter to improve its watermark detection and using synchronization to resist attacks along temporal axis. Experimental results show that the scheme achieves much better performance.
منابع مشابه
Spread spectrum audio watermarking using frequency hopping and attack characterization
In this paper, we present a novel audio watermarking scheme that uses attack characterization to obtain high robustness against standard watermark attacks. The watermark embedding and detection are based on the frequency hopping method in the spectral domain. Perceptual transparency of the algorithm, achieved using frequency masking property of the human auditory system, was con5rmed throughout...
متن کاملDiscrimination of Power Quality Distorted Signals Based on Time-frequency Analysis and Probabilistic Neural Network
Recognition and classification of Power Quality Distorted Signals (PQDSs) in power systems is an essential duty. One of the noteworthy issues in Power Quality Analysis (PQA) is identification of distorted signals using an efficient scheme. This paper recommends a Time–Frequency Analysis (TFA), for extracting features, so-called "hybrid approach", using incorporation of Multi Resolution Analysis...
متن کاملResearch of Blind Watermark Detection Algorithm Based on Generalized Gaussian Distribution
In digital management, multimedia content and data can easily be used in an illegal way-being copied, modified and distributed again. Copyright protection, intellectual and material rights protection for authors, owners, buyers, distributors and the authenticity of content are crucial factors in solving an urgent and real problem. In such scenario, digital watermark techniques are emerging as a...
متن کاملRobust audio watermarking using frequency-selective spread spectrum
A novel audio watermarking scheme based on frequency-selective spread spectrum (FSSS) technique is presented. Unlike most of the existing spread spectrum (SS) watermarking schemes that use the entire audible frequency range for watermark embedding, the proposed scheme randomly selects subband(s) signal(s) of the host audio signal for watermark embedding. The proposed FSSS scheme provides a natu...
متن کاملImproved DWT Based Watermarking Using JPEG-YCbCr
In this paper a blind, Secure, imperceptible and robust watermarking algorithm based on wavelet transform domain is proposed in which for more security, the watermark W is converted to a sequence and then a random binary sequence R of size n is adopted to encrypt the watermark, where n is the size of the watermark image. Afterwards, the encrypted watermark sequence W1 is generated by executing ...
متن کامل