Results 1 to 10 of about 2,513,457 (199)
Colour image encryption scheme based on enhanced quadratic chaotic map
IET Image Processing, 2020 In this study, an enhanced quadratic map (EQM) is proposed and has been applied in a new colour image encryption scheme. The performance evaluations show that the EQM has excellent performances such as better Lyapunov exponent and larger chaotic ranges ...
Djamel Herbadji +2 more
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Maps Completely Preserving the Quadratic Operators [PDF]
Sahand Communications in Mathematical Analysis, 2023 Let $\mathcal{A}$ and $\mathcal{B}$ be standard operator algebras on Banach spaces $\mathcal{X}$ and $\mathcal{Y}$, respectively. Let $\phi: \mathcal{A} \rightarrow \mathcal{B}$ be a bijective map.
Roja Hosseinzadeh
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A novel 1D powered Chebyshev quadratic map-based image encryption using dynamic permutation-diffusion [PDF]
Scientific ReportsChaotic maps have gained significant attention in image encryption systems due to their intrinsic features, including sensitive dependence on initial conditions, non-linear dynamics, high entropy, and ergodicity. These properties enable the generation of
Boukansous Sarra +4 more
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Medical image cryptosystem using improved Quadratic Congruential Generator and logistic map
Measurement: Sensors, 2022 The medical images, patient history, doctor's note, and clinical review contained in an electronic health record are highly sensitive data. Digital images are multimedia data that comprise of hidden information in medical field.
M.Y. Mohamed Parvees, T. Vijayakumar
doaj +3 more sources
Circles and Quadratic Maps Between Spheres [PDF]
Geometriae Dedicata, 2005 14 pages, v3: minor changes to improve ...
Vladlen Timorin
exaly +4 more sources
Unstable periodic orbits and hyperchaos in 2D quadratic memristor map
Franklin OpenThis study explores the characteristics of the simplest invariant sets within a symmetric two-dimensional quadratic memristor map, exhibiting pinched hysteresis. Our analysis reveals critically stable fixed points within the map.
Sishu Shankar Muni
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Birational Quadratic Planar Maps with Generalized Complex Rational Representations
Mathematics, 2023 Complex rational maps have been used to construct birational quadratic maps based on two special syzygies of degree one. Similar to complex rational curves, rational curves over generalized complex numbers have also been constructed by substituting the ...
Xuhui Wang +4 more
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Preperiodicity and systematic extraction of periodic orbits of the quadratic map [PDF]
, 2020 Iteration of the quadratic map produces sequences of polynomials whose degrees {\sl explode} as the orbital period grows more and more. The polynomial mixing all 335 period-12 orbits has degree $4020$, while for the $52,377$ period-20 orbits the degree ...
J. Gallas
semanticscholar +1 more source
Moser’s Quadratic, Symplectic Map [PDF]
Regular and Chaotic Dynamics, 2018 12 pages, 6 figures. For videos see https://www.comp-phys.tu-dresden.de/supp/
Bäcker, A., Meiss, J.
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Quadratic Function Chaotic System and its Application on Digital Image Encryption
IEEE Access, 2020 To obtain chaotic systems with good properties to help chaos based image encryption, this paper first study the condition under which quadratic functions can be used as pseudo-random sequence generator.
Hongfeng Guo +4 more
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