Removable Visible Watermarking Using Discrete Fourier Transform
نویسندگان
چکیده
منابع مشابه
Removable visible image watermarking algorithm in the discrete cosine transform domain
bstract. A removable visible watermarking scheme, which opertes in the discrete cosine transform (DCT) domain, is proposed for ombating copyright piracy. First, the original watermark image is ivided into 16 16 blocks and the preprocessed watermark to be mbedded is generated by performing element-by-element matrix ultiplication on the DCT coefficient matrix of each block and a ey-based matrix. ...
متن کاملDigital image Watermarking using Two Dimensional Discrete Wavelet Transform, Discrete Cosine Transform and Fast Fourier Transform
Abstract—In digital watermarking, a watermark is embedded into a cover text in such a way that the resulting watermarked signal is robust to certain distortion caused by either standard data processing in a friendly environment or malicious attacks in an unfriendly environment. This paper presents a digital image watermarking based on two dimensional discrete cosines transform (DCT2), two dimen...
متن کاملColor image watermarking using quaternion Fourier transform
This paper presents a digital color image watermarking scheme using the hypercomplex numbers representation and the Quaternion Fourier Transform (QFT). Previous color image watermarking methods are first presented and the quaternion representation is then described. In this framework RGB pixel values are associated with an unique quaternion number having three imaginary parts. The QFT is presen...
متن کاملQuantization-Based Digital Audio Watermarking in Discrete Fourier Transform Domain
To explore the principle and performances of Quantization Index Modulation (QIM) watermarking algorithm, the realization schemes of this algorithm in Discrete Fourier Transform (DFT) domain are classified into three types according to the differences of quantizer parameters, and then the illustrative diagrams of these schemes are given, so the properties of transparency, robustness and capacity...
متن کاملDiscrete Fourier transform in nanostructures using scattering
In this article, we show that the discrete Fourier transform ~DFT! can be performed by scattering a coherent particle or laser beam off an electrically controllable two-dimensional ~2D! potential that has the shape of rings or peaks. After encoding the initial vector into the two-dimensional potential by means of electric gates, the Fourier-transformed vector can be read out by detectors surrou...
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: International Journal for Research in Applied Science and Engineering Technology
سال: 2018
ISSN: 2321-9653
DOI: 10.22214/ijraset.2018.3119