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# Arshub

Last seen: 3 maanden ago Active since 2021

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Question

How to scan matrix in spiral way?
I enter an array from me or user defined like A= [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18] and a spiral display is made ...

3 maanden ago | 1 answer | 0

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Question

How to plot bifurcation diagram of the phased `1D chaotic map?
I plot bifurcation diagram of the map bellow but we get wrong bifurcation diagram not as authers plotted as picture bellow, ple...

3 maanden ago | 0 answers | 0

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How do I print a given martix in a spiral matrix scan order but the start from any element as user defined?
if i have this matrix : Input: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ...

3 maanden ago | 1 answer | 0

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Question

how to convert complex number into double number?
I have got this complex value from result of an equation such :( 0.7803 + 0.0000i -0.3681 + 0.5659i 0.8562 + 0.0000i -0.894...

7 maanden ago | 1 answer | 0

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How to change one pixel only in plain image?
How can I change one pixel in an image? I need this to calculation NPCR and UACI between to cipher images whose plain images...

7 maanden ago | 1 answer | 0

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Question

How to calculate UACI and NPCR between to cipher images whose plain images have only a one-pixel difference?
I write this code to explain my problem, this cod is simple encrypt algorithm to encrypt image by Xoring image with key firstly...

7 maanden ago | 1 answer | 1

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Question

How to save image after encryption?
I have code for encrypt an image, then ineed to save image after encryption to use it in another seperate code . which command...

7 maanden ago | 2 answers | 0

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Question

How do we change the positions of the elements of t matrix ?
I need to use S as index to change positions of mateix A S=[1 11 1 4 3 14 6 11 13 11 7 15 5 9 9 7] C = 1:numel(ِِA); S = ...

8 maanden ago | 0 answers | 0

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Question

How to remove duplicate element from matrix ?
I have duplicate matrix S, I need remove the repeated elements from S, and then put the absent numbers at the end to generate a...

8 maanden ago | 1 answer | 0

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Question

How to generate chaotic index between 1 and 256 by hybrid sin-cos map?
lease fix my error.... I have this problem in mode function :"Error using mod Arguments must be real. Pos=mod(xx,size);" I n...

8 maanden ago | 1 answer | 0

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Question

How to create chaotic sequence by lorenz maps and fourth-order Runge– Kutta method?
How to create chaotic sequence from equation bellow by fourth-order Runge– Kutta method and what does "S (i) "mean? suppos ...

8 maanden ago | 0 answers | 0

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Question

How to implement SHA256 to get hash value for image?
I try to implement this paper:" A novel plaintext-related image encryption scheme using hyper-chaotic system" I try to impleme...

8 maanden ago | 0 answers | 0

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Question

how to confusion image by sin-cos map?
I try to implement algorithm in this paper:An efficient color image encryption scheme based on a matrix scrambling method and a...

8 maanden ago | 1 answer | 0