Computationally Efficient Robust Color Image Watermarking Using Fast Walsh Hadamard Transform
Journal of Imaging, 2017 Watermark is the copy deterrence mechanism used in the multimedia signal that is to be protected from hacking and piracy such a way that it can later be extracted from the watermarked signal by the decoder.
Suja Kalarikkal Pullayikodi +3 more
doaj +1 more source
Hybrid Precoding-Beamforming Design With Hadamard RF Codebook for mmWave Large-Scale MIMO Systems
IEEE Access, 2017 This paper proposes a hybrid structure for multi-stream large-scale multi-input multi-output (MIMO) beamforming systems, in single-user scenario, using a Hadamard radio frequency (RF) codebook with low-bit resolution phase shifters. We show that Hadamard
Hussein Seleem +2 more
doaj +1 more source
Laplace Transforms via Hadamard Factorization [PDF]
, 2003 Fuchang Gao +3 more
openalex +1 more source
Comparison between Different Data Image Compression Techniques Applied on SAR Images
Iraqi Journal of Physics, 2008 In this paper, image compression technique is presented based on the Zonal transform method. The DCT, Walsh, and Hadamard transform techniques are also implements. These different transforms are applied on SAR images using Different block size.
Eanas Y. Al-Tae’e
doaj
A Video Dual-Domain Blind Watermarking Algorithm Based on Hadamard Transform
MathematicsAddressing the compatibility challenges surrounding the robustness and reversibility of existing video watermarking techniques, this study introduces a novel video dual-domain blind watermarking algorithm leveraging the Hadamard transform.
Yucheng Liang +4 more
doaj +1 more source
Uniform Approximations for Randomized Hadamard Transforms with Applications [PDF]
, 2022 Yeshwanth Cherapanamjeri, Jelani Nelson
openalex +3 more sources
An Adaptive Watermarking Process in Hadamard Transform [PDF]
arXiv, 2014 An adaptive visible/invisible watermarking scheme is done to prevent the privacy and preserving copyright protection of digital data using Hadamard transform based on the scaling factor of the image. The value of scaling factor depends on the control parameter. The scaling factor is calculated to embedded the watermark.
arxiv
Encryption of Binary and Non-Binary Data Using Chained Hadamard Transforms [PDF]
arXiv, 2010 This paper presents a new chaining technique for the use of Hadamard transforms for encryption of both binary and non-binary data. The lengths of the input and output sequence need not be identical. The method may be used also for hashing.
arxiv
Discrete Hartley matrix transform precoding-based OFDM system to reduce the high PAPR
ICT Express, 2019 The high peak-to-average power ratio (PAPR) is one of the major drawbacks of the orthogonal frequency division multiplexing (OFDM) systems that make non-linear distortion in practical implementation of high power amplifier (HPA).
Abbas Ali Sharifi
doaj
Characterizing and Enumerating Walsh-Hadamard Transform Algorithms [PDF]
arXiv, 2017 We propose a way of characterizing the algorithms computing a Walsh-Hadamard transform that consist of a sequence of arrays of butterflies ($I_{2^{n-1}}\otimes \text{DFT}_2$) interleaved by linear permutations. Linear permutations are those that map linearly the binary representation of its element indices.
arxiv