Results 21 to 30 of about 148,419 (252)
Nearly Optimal Deterministic Algorithm for Sparse Walsh-Hadamard Transform [PDF]
Proceedings of the Twenty-Seventh Annual ACM-SIAM Symposium on Discrete Algorithms, 2015 For every fixed constant α > 0, we design an algorithm for computing the k -sparse Walsh-Hadamard transform (i.e., Discrete Fourier Transform over the Boolean cube) of an N -dimensional vector x ∈ R N in time
Mahdi Cheraghchi, Piotr Indyk
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On the Walsh-Hadamard transform of monotone Boolean functions [PDF]
Tbilisi Mathematical Journal, 2012 Let $f:GF(2)^n \rightarrow GF(2)$ be a monotone Boolean function. Associated to $f$ is the Cayley graph $X$ whose vertices correspond to points of $GF(2)^n$ and whose edges correspond to pairs of vectors $(v,w)$ whose sum is in the support of $f$. The spectrum of $X$ (the set of eigenvalues of its adjacency matrix) can be computed in terms of the Walsh-
Celerier, Charles +3 more
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Original structure for Walsh–Hadamard transform on sliding window [PDF]
Electronics Letters, 2015 The Nth‐order Walsh–Hadamard transform on a sliding window is described here by means of FIF filters. Factoring the transfer functions of the filters allows for a synthesis of the transform as a tree of comb filters. The trees built in ascending or descending order of the delay value allow the computation of the coefficients, respectively, in the ...
Tisserand, Etienne, Berviller, Yves
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Characterization of Basic 5-Value Spectrum Functions Through Walsh-Hadamard Transform [PDF]
IEEE Transactions on Information Theory, 2020 The first and the third authors recently introduced a spectral construction of plateaued and of 5-value spectrum functions. In particular, the design of the latter class requires a specification of integers $\{W(u):u\in \mathbb {F}^{n}_{2}\}$ , where ...
S. Hodžić +2 more
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Parallel Hardware Implementation of Walsh Hadamard Transform
Journal of Scientific & Industrial Research, 2022 The Walsh Hadamard Transform is a powerful notion in digital signal processing. This paper explains the construction of parallel hardware architecture using the mathematical concept of Kronecker product based approach to Walsh Hadamard Transform and its ...
Pulak Mazumder +4 more
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DIAROP: Automated Deep Learning-Based Diagnostic Tool for Retinopathy of Prematurity [PDF]
Diagnostics, 2021 Retinopathy of Prematurity (ROP) affects preterm neonates and could cause blindness. Deep Learning (DL) can assist ophthalmologists in the diagnosis of ROP.
Omneya Attallah
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An Analysis of Registration of Brain Images using Fast Walsh Hadamard Transform [PDF]
International Journal of Computer Applications, 2011 A lot of image registration techniques have been developed with great significance for data analysis in medicine, astrophotography, satellite imaging and few other areas. This work proposes a method for medical image registration using Fast Walsh Hadamard transform. This algorithm registers images of the same or different modalities.
R. Neelaveni, D. Sasikala
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Walsh-Hadamard Transform For Facial Feature Extraction In Face Recognition [PDF]
World Academy of Science, Engineering and Technology, International Journal of Computer, Electrical, Automation, Control and Information Engineering, 2007 This Paper proposes a new facial feature extraction approach, Wash-Hadamard Transform (WHT). This approach is based on correlation between local pixels of the face image. Its primary advantage is the simplicity of its computation. The paper compares the proposed approach, WHT, which was traditionally used in data compression with two other known ...
Mohammed-Albarra Hassan +2 more
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A Novel Autofocus Measure Based on Weighted Walsh-Hadamard Transform
IEEE Access, 2019 The autofocus measure plays an important role in passive digital imaging systems. However, most of the existing methods are more sensitive to the noise. In order to overcome this drawback, we proposed a novel autofocus measure based on the weighted Walsh-
Liqiang Guo, Xiang Cao, Lian Liu
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SymmetryThis paper introduces an effective blind watermarking algorithm for double-color images utilizing the Walsh–Hadamard Transform (WHT) with symmetric embedding locations to enhance imperceptibility.
KVSV Trinadh Reddy, S. Narayana Reddy
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