image steganography using RGB image in matlab
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I was working on image steganography of lsb substitution using RGB image.I couldn't able to figure out what's wrong in the code. It is not showing an error.But,the answer is different while retrieving and codes are :
Embbeding code:
clc
c = imread('pout.tif');
c=imresize(c,[64 64],'nearest');
message = 'image';
message = strtrim(message);
m = length(message) * 8;
AsciiCode = uint8(messag e);
binaryString = transpose(dec2bin(AsciiCode,8));
binaryString = binaryString(:);
N = length(binaryString);
b = zeros(N,1);
for k = 1:N
if(binaryString(k) == '1')
b(k) = 1;
else
b(k) = 0;
end
end
s = c;
height = size(c,1);
width = size(c,2);
k = 1;
for i = 1 : height
for j = 1 : width
LSB = mod(double(c(i,j)), 2);
if (k>m || LSB == b(k))
s(i,j) = c(i,j);
else
if(LSB == 1)
s(i,j) = (c(i,j) - 1);
else
s(i,j) = (c(i,j) + 1);
end
k = k + 1;
end
end
end
imwrite(s,'msgimage.tif');
imshow(c)
retrieving_code:
clc
s = imread('msgimage.bmp');
height = size(s,1);
width = size(s,2);
m = 64;
k = 1;
for i = 1 : height
for j = 1 : width
if (k <= m)
b(k) = mod(double(s(i,j)),2);
k = k + 1;
end
end
end
binaryVector = b;
binValues = [ 128 64 32 16 8 4 2 1 ];
binaryVector = binaryVector(:);
if mod(length(binaryVector),8) ~= 0
error('Length of binary vector must be a multiple of 8.');
end
binMatrix = reshape(binaryVector,8,8);
textString = char(binValues*binMatrix);
disp(textString);
help please.
댓글 수: 3
답변 (1개)
riyaz nadaf
2019년 1월 26일
i did this project. if you want matlab code contact
riyaznadaf034@gmail.com
댓글 수: 1
sruthi sruthi
2019년 8월 20일
sir!
i need the sourcecode for this project.
please help me in this sir....
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