i want code to hide text within image and extract it back.i have code how to hide text. can you suggest me code for how to extract that data from image?

clear all; clc;

dat=dec2bin('tkiet');%string that we want to send x=imread('IMG4701A.jpg');%read carrier image figure;imshow(x);%show carrier image [M N]=size(dat);%size of data

%encoding algoritm starts here

for a=1:1:M for b=1:1:N x(a,b)=bitand(x(a,b),254); x(a,b)=bitor(x(a,b),bin2dec(dat(a,b))); end end figure;imshow(x);title('stego image');%show steganographic image [A B]=size(x);%detect size of image

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

Answer 1

[Image Analyst]

See my attached demo of LSB watermarking. That's one way.

[hemalatha]

your answer is useful for me..but i need to extract a text from the stegno image..please clearly explain me retrieveing technique

[Image Analyst]

I don't have a demo for that so I suggest you look at section 23.3 here: Watermarking