I need to get the hidden text from the cover image using lsb ..i have first part to hidden the text in color image using stegnography ...but i want the second part .how to get the hidden text ....please i want it in my work

c = imread('any_image.jpg');
message = 'hi this is sagar from nagpur..'
message = strtrim(message);
m = length(message) * 8;
AsciiCode = uint8(message); 
binaryString = transpose(dec2bin(AsciiCode,8));
binaryString = binaryString(:);
N = length(binaryString);
b = zeros(N,1); %b is a vector of bits
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; Array=[];l=1;my=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);
            l=k+1;
        else 
            if(LSB == 1)
                s(i,j) = c(i,j) - 1;
            else
                s(i,j) = c(i,j) + 1;
                Array(my)=l;
                l=l+1;
                my= my + 1;
            end
        k = k + 1;
        end
    end
end
imwrite(s, 'hiddenmsgimage.bmp');
k = 1;my=1;ur=1;
for i = 1 : height
    for j = 1 : width
        if( k<=m )
            if (my<numel(Array) && Array(my)==ur)
                b(k)=~(mod(double(s(i,j)),2));
            else
                b(k) = mod(double(s(i,j)),2);
            end
            k = k + 1;
            my= my + 1;
        end
        ur=ur+1;
    end
end

[Geoff Hayes]

hudof - is the above your code? If so, can't you work "backwards" and extract the least significant bits from the image and reconstruct the message?

[Muhammad Asfandyar Shahid]

can you retrieve your message???

[Image Analyst]

He can if he uses my code in my answer in the official Answers section down below.

Answer 1

[Image Analyst]

See how I did it: http://www.mathworks.com/matlabcentral/fileexchange/54155-encoding-text-into-image-gray-levels