STEGANOGRAFI MENGGUNAKAN METODE DISCRETE FOURIER TRANSFORM (DFT)
Jurnal Informatika Polinema, 2018 Seiring dengan kemajuan teknologi, serangan terjadi pada industri photography di mana banyak penyalahgunaan foto yang memiliki hak cipta tanpa seijin pemilik foto tersebut. Karena itulah dibuat sebuah aplikasi yang berfungsi untuk menyisipkan watermark dengan menggunakan metode DFT (Discrete Fourier Transform).
null Yuri Ariyanto +2 more
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Ultrafast Analog Fourier Transform Using 2-D LC Lattice [PDF]
, 2008 We describe how a 2-D rectangular lattice of inductors and capacitors can serve as an analog Fourier transform device, generating an approximate discrete Fourier transform (DFT) of an arbitrary input vector of fixed length.
Afshari, Ehsan +2 more
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Comparison of Discrete Cosine Transforms (DCT), Discrete Fourier Transforms (DFT), and Discrete Wavelet Transforms (DWT) in Digital Image Watermarking [PDF]
International Journal of Advanced Computer Science and Applications, 2017 Digital Image Watermarking is used recently to secure the image by embedding another digital image. It is typically used to identify ownership of the copyright of the signal. Frequency domain transformation methods used widely in Digital Image Compression and Digital Image Watermarking.
Rosa A, Reza Agustina, Hidayatulloh -
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Simplified approach to DFT computation for nonprogrammable scientific calculators
Bibechana, 2014 Fourier analysis is an important tool used as it is or it’s different variants in many fields of sciences and engineering. It’s importance is due to it’s simplicity with which it expands a given function in terms of circular or complex exponents ...
Mohd Yusuf Yasin
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Sensing Fractional Power Spectrum of Nonstationary Signals with Coprime Filter Banks
Complexity, 2020 The coprime discrete Fourier transform (DFT) filter banks provide an effective scheme of spectral sensing for wide-sense stationary (WSS) signals in case that the sampling rate is far lower than the Nyquist sampling rate.
Xiaomin Li +3 more
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New single-carrier transceiver scheme based on the discrete sine transform
The Journal of Engineering, 2014 A discrete sine transform (DST)-based single-carrier transceiver scheme for broadband wireless communications is proposed and investigated. The proposed scheme uses a DST rather than the conventional discrete Fourier transform (DFT) as a basis function ...
Faisal Al-kamali
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Coherent optical implementations of the fast Fourier transform and their comparison to the optical implementation of the quantum Fourier transform [PDF]
, 2013 Optical structures to implement the discrete Fourier transform (DFT) and fast Fourier transform (FFT) algorithms for discretely sampled data sets are considered. In particular, the decomposition of the FFT algorithm into the basic Butterfly operations is
Birch, Philip M +2 more
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More on algebraic properties of the discrete Fourier transform raising and lowering operators★
4 open, 2019 In the present work, we discuss some additional findings concerning algebraic properties of the N-dimensional discrete Fourier transform (DFT) raising and lowering difference operators, recently introduced in [Atakishiyeva MK, Atakishiyev NM (2015), J ...
Atakishiyeva Mesuma K. +2 more
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R–DFT-based Parameter Estimation for WiGig [PDF]
, 2017 In this paper we present parameter estimation methods for IEEE 802.11ad transmission to estimate the frequency offset value and channel impulse response.
Csuka, Barna, Kollár, Zsolt
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The Discrete Fourier Transform (DFT) in Behavioural Analysis
Journal of Theoretical Biology, 1994 Abstract Spectral analysis is an important tool for examining time-series data and can be particularly powerful in detecting periodicity in animal behaviour patterns. Because of its simplicity and the speed of current computing algorithms, the discrete Fourier transform is most often used in spectral analysis.
T.G. Forrest, Robert B. Suter
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