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aditya sahu


Last seen: 25 days ago
17 total contributions since 2017

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Question


how to plot a graph in matlab ?
Let given array A with 512*512 elements are (here one sample of 4*4 is given) 5 4 6 8 9 11 30 34 ...

3 years ago | 1 answer | 0

1

answer

Question


How to avoid this problem "consider preallocating the memory .for speed" in the below sample code
The code is like this m = []; x=[100,200,300.....] for k= 1:1:142 if(k >= 142) break; en...

3 years ago | 2 answers | 0

2

answers

Question


How to find the position of smallest element in an array.
Suppose there is an array called 'x' which contains elements such as, [12,13,16,10,17,9,19,45]. How to find the position of the ...

3 years ago | 1 answer | 0

1

answer

Question


How to place the minimum value of a 3*3 matrix at center of the matrix.?
Suppose a matrix x= 512*512 elements. How to select 3*3 matrix and the smallest element should be at the center position. i.e...

3 years ago | 2 answers | 0

2

answers

Question


What is chisquare attack and how to perform chisquare attack for Least significant bit Image steganography
What is chi-square attack and how to perform chi-square attack for Least significant bit Image steganography

3 years ago | 0 answers | 0

0

answers

Question


how to plot graph
suppose i have a matrix of 512*256 elements ranging from -200 to 200. I need to plot a graph, where the x-axis is the elements ...

3 years ago | 1 answer | 0

1

answer

Question


HOW TO PLOT PIXEL DIFFERENCE HISTIOGRAM(PDH) ANALYSIS IN IMAGE STEGANOGRAPHY.?
HOW TO PLOT PIXEL DIFFERENCE HISTIOGRAM(PDH) ANALYSIS IN IMAGE STEGANOGRAPHY.

3 years ago | 0 answers | 0

0

answers

Question


how to find difference between column elemnts in a matrix ?
Let my matrix is 3 2 14 5 7 1 8 9 11 11 12 13 I need to find the substractio...

3 years ago | 2 answers | 0

2

answers

Question


how to find the next minimum value using if..else only?
let the given values are, b1(k)=195, b1(k+1)=190,and p1(k)=204,p1(k+1)=187, p11(k)=220,p111(k)=188,p11(k+1)=203,p111(k+1)=1...

3 years ago | 0 answers | 0

0

answers

Question


how to define the below function ?
How to define the function f1= 2n<->2n+1 i.e it defines two transformations. 1. from value 2n to 2n+1. 2.from value 2n+1 t...

3 years ago | 1 answer | 0

1

answer

Question


what is meant by rs steganalysis and pixel value differencing histogram analysis, and how to write the program on this?
what is meant of rs steganalysis and pixel value differencing histogram analysis, and how to write the program on this?

3 years ago | 1 answer | 0

1

answer

Question


How to replace some values in a matrix?
I have x=16 * 16 matrix of double values. i need to figure out consecutive values of 'x' which are less than 150 and replace the...

3 years ago | 1 answer | 0

1

answer

Question


Let, i have an lena image of 512*512 pixels. if the consecutive pixels of an image are less than 100 i want to apply 3 LSB, but if the consecutive pixels or any one of them are more than 100 then i want to use PIXEL VALUE DIFFERENCING( PVD) METHOD.
I need to hide text inside an image,Let, i have an lena image of 512*512 pixels. if the consecutive pixels of an image are less ...

3 years ago | 1 answer | 0

1

answer

Question


how to separate values of a matrix into 2 different matrix.
I have a matrix of 2*2=4 elements.Let it be x= [2 3 ; 4 5] i want separate the matrix into 2 matrixes. one matrix contains val...

3 years ago | 1 answer | 0

1

answer

Question


how to find percentage of similarity between two arrays.
Suppose x=[1 0 1 0],y=[1 1 1 0] here, if i compare individual elements of x with y, then the highest matching (i have to consid...

3 years ago | 5 answers | 0

5

answers

Question


How to find longest common substring in case of binary arrays?
Hello,my dear friends I need your assistance for solving a problem. I want to find longest common substring in case of two arr...

3 years ago | 0 answers | 0

0

answers

Question


HOW TO PERFORM 3 LSB AND 4 LSB REPLACEMENT
SUPPOSE I HAVE AN ARRAY OF 512*512 PIXEL ELEMENTS. I ALSO HAVE ANOTHER ARRAY 'DATA' OF O AND 1 VALUES. I HAVE TO REPLACE THE LAS...

3 years ago | 2 answers | 0

2

answers