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An image encryption algorithm based on a novel two-dimensional hyperchaotic map and difference algorithm

NONLINEAR DYNAMICS 2025年第4期113卷 3801-3828页

作者： Deng, Yong Tian, Xiaomei Chen, Zhong Xiao, Yongquan Xiao, Yanting Hengyang Normal Univ Coll Comp Sci & Technol Hengyang 421002 Peoples R China Hunan Prov Key Lab Intelligent Informat Proc & Ap Hengyang 421002 Peoples R China

Currently, many existing image encryption algorithms have encountered challenges in achieving robustness and efficiency, mainly due to insufficient scrambling or inadequate diffusion mechanisms. These limitations can lead to vulnerabilities, making encrypted images more susceptible to attacks and reducing overall security. To address these issues, this paper proposes a new image encryption algorithm (MCLCM-IEA) based on a novel two-dimensional hyperchaotic map (2D-MCLCM). This algorithm integrates a difference algorithm during diffusion and a double-pointer algorithm during scrambling. Additionally, to enhance the security of cipher images, we introduce a plaintext-related weight matrix, which not only expands the key space of MCLCM-IEA but also strengthens its overall security. Benefiting from the superior chaotic properties exhibited by 2D-MCLCM, the strong diffusion efficiency got from the difference diffusion algorithm, and the effective scrambling provided by the double-pointer algorithm, MCLCM-IEA performs exceptionally well in simulation experiments. The results demonstrate that MCLCM-IEA can effectively resist various illegal attacks and showcase robust security and high efficiency.

关键词： Image encryption Chaos Hyperchaotic map difference algorithm Image security

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An improved three-point method based on a difference algorithm

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PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY 2020年 63卷 68-82页

作者： Huang, Ran Pan, Wei Lu, Changhou Zhang, Yixin Chen, Shujiang Shandong Univ Sch Mech Engn Key Lab High Efficiency & Clean Mech Manufacture Jinan 250061 Shandong Peoples R China

The reason for the rounding error in a measurement system under the condition of a limited sampling period is analysed, and a three-point method based on the difference algorithm (D3P method) is proposed. The effect of the rounding error is reduced by differential approximation of the roundness error and reconstruction of the transfer function. The generalized three-point method (G3P method), the three-point method based on the first-order difference algorithm (I-D3P method) and the three-point method based on the second-order difference algorithm (II-D3P method) are compared and analysed by simulation. The results show that the accuracy of the D3P method is greatly improved compared with that of the G3P method under the restricted sampling period and that the D3P method retains high precision in the case of failed error separation of the G3P method. An experimental system was constructed to realize error separation, and the experimental results show that the D3P method has higher accuracy than the G3P method over a small sampling period.

关键词： Three-point method difference algorithm Roundness error Error separation

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CURVES GENERATED BY A 3-TERM difference algorithm

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MATHEMATICAL AND COMPUTER MODELLING 1995年第3期22卷 49-64页

作者： QU, R Department of Mathematics National University of Singapore Singapore 0511

algorithms for the generation of curves and surfaces play a very important role in shape design and modelling in CAD/CAM systems. In this paper, a simple three term difference algorithm is studied in detail and it is concluded that this algorithm could generate both conic curves, general monomial curves, and exponential spiral curves which interpolate the initial points. The geometric constructions of such curves and their properties are also obtained. Two shape control parameters are provided so that the shape of the generated curve can be adjusted according to requirements. An immediate generalization of the method is the generation of uniform surface data in R(d), d greater than or equal to 3.

关键词： CONICS PARAMETRIC CURVE difference algorithm SUBDIVISION INTERPOLATION

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The Application of difference algorithm to PPW Interference Cancellation in Heart Rate Detection

The Application of Difference Algorithm to PPW Interference ...

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International Conference on Measuring Technology and Mechatronics Automation

作者： Liu Xiaodong Li Yarong Yang Baoqing Univ DaLian JiaoTong Dept Mech Engn Dalian Peoples R China

ISBN: (纸本)9780769535838

A novel Interference Cancellation algorithm based on pressure pulse width (PPW) signal is presented, in order to ensure the high reliability of measurement results in pulse detection system with capacitive sensors. There is an output function of pulse width as the system analysis model, which has the corresponding relationship with pulse pressure. The analysis is conducted by using first order difference algorithm of discrete sequence, which c I an reveal the change rate of pulse signals. And the bubbling up sorting method is used for acquiring the pulse cycle automatically. The experimental comparison and analyses indicate that the sensor with this algorithm maintains a more effective way on filtering unorderly signal, especially enhancing the reliability of dynamic pulse detection.

关键词： heart rate interference cancellation difference algorithm reliability

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FATIGUE DETECTION BASED ON FACIAL IMAGES PROCESSED BY difference algorithm 13

FATIGUE DETECTION BASED ON FACIAL IMAGES PROCESSED BY DIFFER...

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13th IASTED International Conference on Biomedical Engineering (BioMed)

作者： Chen, Jia Tao, Yin Zhang, Dalong Liu, Xiaoli Fang, Zhen Zhou, Qinwu Zhang, Bo Xi An Jiao Tong Univ Sch Life Sci & Technol Xian Shaanxi Peoples R China

ISBN: (纸本)9780889869905

In this paper a technique for detecting the daily fatigue using the characteristics of local facial image is discussed. To reduce the influence of environment illumination and retain more details of features, the images are preprocessed by the method of color consistent area correction. The texture and color features are derived from the gray level co-occurrence matrix and two kinds of color space, and the reliability and universality of the system is improved by the difference algorithm. Then the error backward propagation algorithm is employed to form a complete detection algorithm. Finally, the method achieves 92.3% accuracy with the self-built image database. With convenient data acquisition source and low computational complexity, the proposed method has a good prospect for the application in the field of home medical devices and mobile health devices.

关键词： fatigue detection facial image color consistent area correction difference algorithm

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A Real Time Tracking algorithm Basing on Mixed difference algorithm

A Real Time Tracking Algorithm Basing on Mixed Difference Al...

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International Conference on Advanced Measurement and Test (AMT 2010)

作者： Wang, Aixia Wu, Peng Li, Jingjiao Yan, Aiyun Northeastern Univ Coll Informat Sci & Engn Shenyang 110004 Peoples R China

ISBN: (纸本)9780878492695

This paper presented a high real time target tracking algorithm mixed difference tracking algorithm MDT. In the proposed algorithm, frame difference and background difference algorithms are combined to get the location of the target. With background difference algorithm the shape of the target can be extracted. Due to the affection of the dynamic background, single background difference algorithm can not get the location of the moving target. To solve this issue the frame difference algorithm is used to estimate the location, and then combine the results of the background difference algorithm and the frame difference algorithm the location and the size of the target can be extracted. And then filtering algorithm is used to remove noise and isolated points. In the experiment it can be seen that the proposed algorithm can tracking object precisely in real time.

关键词： target tracking real time tracking difference algorithm

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Research of Magnetic Field Navigation Intelligent Vehicle System Based on difference algorithm 3

Research of Magnetic Field Navigation Intelligent Vehicle Sy...

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3rd International Conference on Mechatronics and Control Engineering (ICMCE)

作者： Dong, Wu Bie, Hongxia Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing 100088 Peoples R China

ISBN: (纸本)9783038352914

To implement intelligent vehicle control system based on magnetic field detection, automation navigation scheme based on difference algorithm is proposed. The feature of magnetic field of the road is analyzed, and layout method of sensors is proposed, and signals of magnetic field sensors are gathered and filtered, and road control strategy based on difference algorithm is proposed, and steering gear is used to implement cornering of intelligent vehicle, and position PID algorithm is used to implement speed control of intelligent vehicle. The experiment result shows that intelligent vehicle using this scheme can work steadily at high speed, and has higher practicability and is worth to be propagated in many fields.

关键词： magnetic field navigation intelligent vehicle difference algorithm

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A Modified Implicit Iterative difference algorithm for Stiff Chemical Kinetic Equations in Complex Combustion System

A Modified Implicit Iterative Difference Algorithm for Stiff...

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International Conference on Advanced Engineering Materials and Technology (AEMT2011)

作者： He, Bo Nie, WanSheng Feng, SongJiang Li, GuoQiang Co Postgrad Management Acad Equipment Command & T 98 POB 3380 Huairou Beijing 101416 Peoples R China Dept Space Equip Acad Equip Command & Technol Beijing 101416 Peoples R China

ISBN: (纸本)9783037851944

The splitting-operator method has been widely used in the numerical simulation of complex combustion system with its high computation efficiency. The main difficult encountered in the method is how to integrate the stiff chemical kinetics ordinary differential equation (ODE) efficiently and accurately in each grid node of flow field. Although several ODE software packages such as LSODE and VODE have very predominant performance in integrating stiff and non-stiff case, it couldn't ensure the positivity of mass fraction in integrating stiff chemical kinetic ODE. A detail liquid rocket hypergolic bipropellant combination of Monomethylhydrazine (MMH)/Red Fuming Nitric Acid (RFNA) chemical mechanism consisting of 550 elementary reactions among 83 species was constituted basing on several relevant literatures firstly. And then a modified implicit iterative difference algorithm with variable time steps was developed to tackle the problem of mass fraction non-positive. The results from the integration of MMH /nitrogen tetroxide (NTO) chemical kinetic ODE indicate that the algorithm is always retain stability and positive value of mass fraction. The time step length would also be automatically adjusted at different chemical reaction time in the algorithm to keep its computational efficiency.

关键词： Splitting-Operator method Stiff ordinary difference equation Chemical kinetics Positivity difference algorithm

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Study on difference algorithm used in missile radiator real-time tracking

Study on difference algorithm used in missile radiator real-...

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Measurement Touch the World——IEEE 2011 10th International Conference on Electronic Measurement & Instruments(ICEMI’2011)

作者： Xu Zhenhui Yang Xi Jia Yongqian(1 Department of Arms Engineering,Academy of Armored Force Engineering,Beijing,China 2 Military Representation Office of 528 Factory,Nanjing 210006 China)

Due to the bad effect of tracking missile radiator and the problem of the unideal initial position and the severe occlusion based on Mean-Shift algorithm,it presents a new algorithm named difference algorithm that uses Kalman filter predicting and Mean-Shift *** to the new difference algorithm method,predicting tracking overall scheme of missile radiator has been proposed and Kalman wave filter has been constructed by using trajectory character of missile *** software is utilized to write the procedure to prove the new *** research result shows that by using difference algorithm,it realizes accurate predict of missile radiator in the next frame *** only the real-time character but also the accuracy character can be improved *** the continual tracking problem of missile radiator after shortly sheltered or missing can be solved effectively.

关键词： missile radiator Mean-Shift algorithm Kalman filtering difference algorithm

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Nonadditive Monte Carlo Simulation Of Liquid Hydrogen Chloride difference algorithm And Parallel Implementation

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Molecular Simulation 1991年第1-2期7卷 71-88页

作者： Steinhauser, O. Boresch, S. Bertagnolli, H. Institut för Theoretische Chemie Universität Wien A-1Q90 Vienna Währingerstraße 17 Austria Institut för Physikalische Chemie Universität Wörzburg D-W-8700 Wörzburg Marcusstraße 9-11 Germany

This paper continues our Monte Carlo simulation study of liquid hydrogen chloride [1]. The importance of non-additive interactions is carefully analyzed. Computed atom pair correlation functions are compared to neutron scattering experiments [2]. A difference algorithm (“A - algorithm”) is developed, which makes non-additive Monte Carlo simulations practicable. We also report an implementation of this algorithm on a transputer network, taking advantage of the inherent parallelism of the A - algorithm. © 1991, Taylor & Francis Group, LLC. All rights reserved.

关键词： difference algorithm Liquid hydrogen chloride non-additive interactions transputer network

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