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Sultan Mehmood


14 total contributions since 2018

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Question


why wavelet filter used in DWTCT??
%load sculpture %imagesc(X) %colormap gray [LoD,HiD] = wfilters('haar','d'); [cA,cH,cV,cD] = dwt2(X,LoD,HiD,'mode','symh'); ...

5 months ago | 0 answers | 0

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Answered
I wana use key in this code butt how??
How key works

7 months ago | 0

Question


I wana use key in this code butt how??
load sculpture imagesc(X) colormap gray [LoD,HiD] = wfilters('haar','d'); [cA,cH,cV,cD] = dwt2(X,LoD,HiD,'mode','s...

7 months ago | 1 answer | 0

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Question


[LoD,HiD] = wfilters('haar','d'); how can i use this in DWT as a key.? Or how i can use DWT with key .
load sculpture imagesc(X) colormap gray [LoD,HiD] = wfilters('haar','d'); [cA,cH,cV,cD] = dwt2(X,LoD,HiD,'mode','symh'); ...

7 months ago | 0 answers | 0

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Question


is it possible "meaningfull image encryption" without DWT. ?
# Item one # Item two

8 months ago | 1 answer | 0

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Question


how discrete wavelet transform used by using a key? To secure the image
if true % code end X=imread('lena512.bmp'); [LoD,HiD] = wfilters('haar','d'); [cA,cH,cV,cD] = dwt2(X,LoD,HiD,'mode'...

10 months ago | 0 answers | 0

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Question


how swap the bits position of image A(I,j).please correct the mistake.
A= imread('camera man.png'); k=1:65536; for I=1:256; for j=1:256; x=[0.3,zeros(1,65535)]; p=0.343; ...

11 months ago | 0 answers | 0

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Question


how swap the bits at position L&P of A(I,j).?
A= imread('camera man.png'); k=1; for I=1:256; j=1:256; end x=0.3; p=0.343; for n=2:65536; if x(n-...

11 months ago | 1 answer | 0

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answer

Question


how to create a relation b/w two vector a scrambling vector "T'' is formed. let two vector x & S then scramble vector T is formed.such that S(t)=x(t(i)).plzz help
x(1)=0.3; p=0.343; for n=2:9; if x(n-1)>=0 & x(n-1)<=p x(n)=x(n-1)/p; else x(n)=(1-x(n-1))/(...

11 months ago | 1 answer | 0

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Question


let x&T two vector.now permute the x with T to get Y such that "y=x(t(n)).n is itration...next step???
A=[1 2 3;4 5 6;7 8 9]; B=A(:)'; x(1)=0.3; p=0.343; for n=2:9; if x(n-1)>=0 & x(n-1)<=p x(n)=x(n-1)/p; else x(n)=(1-x(n...

11 months ago | 0 answers | 0

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Answered
how to create a relation b/w two vector by scrambling of vector. let two vector R & S then scrambled and vector T is formed.
plz help me is it true for pixel permutation. x=0.3; p=0.343; for n=2:65536; if x(n-1)>=0 & x(n-1)<=p x(n)=x(n...

11 months ago | 0

Question


how to create relation b/w two vector by scrambling vector .let x& A be two vectors and T is formed by scrambling vectors. s.that A(i)=x(t(i)
x=0.3; p=0.343; for n=2:5; if x(n-1)>=0 & x(n-1)<=p x(n)=x(n-1)/p; else x(n)=(1-x(n-1))/(1-p); end e...

11 months ago | 0 answers | 0

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