sir,I have done the encoding process ,I want to decode the final image share.can you help me to decode the final image share into original image?

Question

PLACEIUS NISHIGA G 2018-2-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/380770-sir-i-have-done-the-encoding-process-i-want-to-decode-the-final-image-share-can-you-help-me-to-deco

关闭： MATLAB Answer Bot 2021-8-20

if true
clc;
clear all;
close all;
I=imread('Cameraman.tif');
[W,L]=size(I);
V=I(:)';
K=randi([0,1],1,192);
for x=1:2
  a1=1;
  for i=1:4
      su=0;
      for t=((48*i)-47):(48*i)
          mull=(K(t)*2^(t-48*i+47));
          su=su+mull;
      end
     A(i)= su/(2^48);
     a1=a1*A(i);
  end
  rrr(x)=a1*2^48+A(x);
  r(x)=mod((rrr(x)),0.4)+3.6;
  cxxx(x)=a1*2^48+A(x+2);
   c(x,1)=mod((cxxx(x)),1);
end
for x=1:2
  for y=1:length(V)
      if y==1
          c(x,y)=c(x,1);
      end
      if (y~=1 && c(x,y-1)<0.5)
          c(x,y)=0.5*r(x)*c(x,y-1);
      end
      if (y~=1 && c(x,y-1)>=0.5)
          c(x,y)=0.5*r(x)*(1-c(x,y-1));
      end
  end
end
for y=1:65536
  if y==1
      E1(y)=V(y);
  else
      st=double(floor(c(1,y)*10^13));
      fg=double(V(y));
      gh=double(V(y-1));
      du=st+fg+gh;
       E1(y)=mod(du,256);
  end
end
suy=0;
for y=1:length(V)
  if y==length(V)
      E2(y)=E1(y);
  else
      st1=double(floor(c(2,y)*10^13));
      fg1=double(E1(y));
      gh1=double(E1(y+1));
      du1=st1+fg1+gh1;
      E2(y)=mod(du1,256);
  end
  s=E2(y);
  suy=suy+s;
end
nor_E2=decimalToBinaryVector(suy, 192, 'MSBFirst');
xo=xor(nor_E2,K);
ho=zeros(1,24);
kam=1;
for i=1:8:length(xo)
  ho(kam)=bi2de(xo(i:i+7),'left-msb');
  kam=kam+1;
end
E=[ho,E2];
k=3;
n=5;
size_of_m=(2*k-2);
for i=1:(2*k-2)
  if i<=k-1
      m1(i)=1;
  else
      m1(i)=0;
  end
end
n11 = numel(m1);
k11 = sum(m1);
c = nchoosek(1:n11,k11);
[m,nu] = size(c);
out = zeros(m,n11);
mull=ones(1:nu);
out(sub2ind([m,n11],(1:m)'*mull(1:nu),c)) = 1;
s_Initial=out';
[ini_row,ini_col]=size(s_Initial);
I11=max(ceil(log2(n/(2*k-2))),0);
s_Ini1{1}=s_Initial;
if I11==0
  s_exp=s_Initial;
else
  for iter=1:I11
      exp_row=ini_row*ini_row/2;
      exp_col=ini_col*ini_col;
      count=0;
      ii=1;
      jj=1;
      for i=1:ini_col
          for j=1:ini_row
              if s_Ini1{iter}(j,i)==1
                  if (count==0)
                      s_exp(jj:jj+ini_row/2-1,ii:ii+ini_col-1)=s_Ini1{iter}(1:ini_row/2,:);
                      count=count+1;
                  else
                      s_exp(jj:jj+ini_row/2-1,ii:ii+ini_col-1)=s_Ini1{iter}(ini_row/2+1:ini_row,:);
                      count=0;
                  end
              else
                  s_exp(jj:jj+ini_row/2-1,ii:ii+ini_col-1)=1;
              end
              jj=jj+ini_row/2;
          end
          jj=1;
          ii=ii+ini_col;
      end
      [ini_row,ini_col]=size(s_exp);
      s_Ini1{iter+1}=s_exp;
  end
end
for i=1:length(s_Ini1)
  [rr,cc]=size(s_Ini1{i});
   for j=1:rr
       [r,cu,vvv]=find(s_Ini1{i}(j,:));
       onee1(i,j)=length(r);
   end
end
s_share(1:n,:)=s_exp(1:n,:);
for roe=1:n
  for i=1:length(s_share):length(E)
      dfr{roe}(i:i+length(s_share)-1)=s_share(roe,:);
  end
end
H=zeros(6,length(E));
for roe=1:n
  for i=1:length(E)
      if dfr{roe}(i)==1
          H(roe,i)=E(i);
      end
  end
end
D(1)=floor(length(s_share)/256);
D(2)=mod(length(s_share),256);
size_of_B=ceil(length(s_share)/8);
if (mod(length(s_share),8)==0)
  z=0;
else
  z=8-(mod(length(s_share),8));
end
for i=1:n
  s_cap(i,:)=[s_share(i,:),zeros(1,z)];
end
for i=1:n
  for j=1:size_of_B
      sumii=0;
      for j1=8*j-7:8*j
          sumii=sumii+(s_cap(i,j1)*2^(j1-8*j+7));
      end
      B{i}(j)=sumii;
  end
end
for i=1:n
  F{i}=[D B{i} H(i,:)];
end
for i=1:n
  length_of_Fi=length(F{i});
  x_of_size_of_Gi=W;
  y_of_size_of_Gi=ceil(length_of_Fi/W);
  conf=mod(length_of_Fi,W);
  if (conf==0)
      G{i}=F{i};
  else
      if (conf==0)
          vg=0;
      else
          vg=W-(mod(length_of_Fi,W));
      end
      G{i}=[F{i},zeros(1,vg)];
  end
end
for i=1:n
  reshaped_G{i}=reshape(G{i},x_of_size_of_Gi,y_of_size_of_Gi);
end
final_encrypted_secured_share=reshaped_G;
end