Results 21 to 30 of about 34,743 (255)
Semi-fragile watermarking technology based on SVD decomposition and Hadamard transform
网络与信息安全学报, 2017 The semi-fragile watermarking algorithm based on Hadamard transform and SVD decomposition was proposed to distinguish normal image processing operations from malicious tampering.Firstly,the carrier image was SVD decomposed,and Hadamard transform was ...
Zhi-hong WANG,Hui-fen HUANG,Yu-hong CHANG
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Sensors, 2021 In this paper, a new WHT-LWT-GFDM waveform obtained by combining Walsh–Hadamard Transform (WHT), Lifting Wavelet Transform (LWT), and Generalized Frequency Division Multiplexing (GFDM) is presented for use in next-generation wireless communication ...
Meryem Maraş +4 more
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Fitzpatrick transform of monotone relations in Hadamard spaces
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2020 In the present paper, monotone relations and maximal monotone relations from an Hadamard space to its linear dual space are investigated. Fitzpatrick transform of monotone relations in Hadamard spaces is introduced. It is shown that Fitzpatrick transform
Moslemipour A. +3 more
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AIMS Mathematics, 2022 This paper discusses the existence, uniqueness and stability of solutions for a nonlinear fractional differential system consisting of a nonlinear Caputo-Hadamard fractional initial value problem (FIVP).
Hadjer Belbali +4 more
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Root-Hadamard transforms and complementary sequences [PDF]
Cryptography and Communications, 2020 In this paper we define a new transform on (generalized) Boolean functions, which generalizes the Walsh-Hadamard, nega-Hadamard, $2^k$-Hadamard, consta-Hadamard and all $HN$-transforms. We describe the behavior of what we call the root- Hadamard transform for a generalized Boolean function $f$ in terms of the binary components of $f$.
Luis A. Medina +3 more
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Comparison of Image Compressions: Analog Transformations
Proceedings, 2020 A comparison between the four most used transforms, the discrete Fourier transform (DFT), discrete cosine transform (DCT), the Walsh–Hadamard transform (WHT) and the Haar-wavelet transform (DWT), for the transmission of analog images, varying their ...
Jose Balsa
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High-Capacity Image Steganography Based on Discrete Hadamard Transform
IEEE Access, 2022 High capacity and high imperceptibility are the primary targets for ideal image steganography. For the traditional transform-based schemes, the main challenge is to balance the imperceptibility, hiding capacity, and running efficiency.
Ying-Qian Zhang +2 more
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METHODS FOR DETECTING AND SELECTING AREAS ON TEXTURE BIOMEDICAL IMAGES OF BREAST CANCER
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2022 This paper is devoted to topical issues - the development of methods for analyzing texture images of breast cancer. The main problem that is resolved in the article is that the requirements for the results of pre-processing are increasing.
Ainur Orazayeva +5 more
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Compressive Optical Spectrometry Based on Sequency-Ordered Hadamard Transform
IEEE Photonics Journal, 2020 We propose a compressive Hadamard transform spectrometer (CHTS) based on the energy compaction trait of the sequency-ordered Hadamard matrix (SOHM), in which the spectrum is reconstructed from compressed measurements using simple matrix multiplication ...
Yi Zhang +3 more
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Optical full Hadamard matrix multiplexing and noise effects [PDF]
, 2009 Hadamard multiplexing provides a considerable SNR boost over additive random noise but Poisson noise such as photon noise reduces the boost. We develop the theory for full H-matrix Hadamard transform imaging under additive and Poisson noise effects.
Burling-Claridge, G. Robert +3 more
core +2 more sources