how do I descrambling for the scrambling code explain in below:

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hayat ali
hayat ali 2018-11-24
评论： Devisha Tiwari 2021-4-16
origin=imread('lena.bmp');
imshow(origin)
title('Image Loaded')
temp=origin;
n=length(temp)
N=3000; % no of iterartions
m=0;
a=20;
b=10;
c=a*b+1;
flag=0;
while flag==0
for i=0:n-1
for j=0:n-1
x=mod(i+a*j,n);
y=mod(b*i+c*j,n);
lastimage(x+1,y+1)=temp(i+1,j+1);
end
end
m=m+1;
if(mod(m,4)==0)
figure,imshow(lastimage)
title('Scrambled Image')
flag=flag+1;
else
temp=lastimage;
end
end

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采纳的回答

Image Analyst
Image Analyst 2018-11-24
It looks like you're trying to do Arnold's cat map: Wikipedia Arnold's cat map
See wikipedia and my attached demo, which has LOTS of comments to explain it.
  2 个评论
hayat ali
hayat ali 2018-11-27
Image Analyst
thank you very much.
I just want steps that reflect the previous code steps. can you help me to get it?
Image Analyst
Image Analyst 2018-11-27
Not sure what you want to get. The previous code steps will of course "reflect" the previous code steps. In fact, they are identical. I don't know what steps to tell you to take. Do you mean
  1. highlight the code,
  2. type control-c, then
  3. go somewhere where you want to paste it, and
  4. type control-v?
Those steps?
Please format your code as code so that people can easily copy it to the clipboard. Then no one has to mess with highlighting and typing control-c, we can just click the copy link.

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