Description: % file name: randlsbget. M
% programmer: yu bo
Writing time: 2007.6.25
Function: this function will complete the secret information that is hidden
Example: result= (scover.jpg, 56, secret. TXT, 2001)
% parameter description:
% output is the image after the information is hidden
% len_total is the length of the secret information
The % goalfile is the extracted secret information file
The % key is the key of the random interval function
% result is the information extracted
The function result = randlsbget (output, len_total goalfile, key)
Ste_cover = imread (output)
Ste_cover = double (ste_cover)
% determine whether embedded information is too large
[m, n] = size (ste_cover)
FRR = fopen (goalfile, a)
The % p is used as the information embedding bit counter to write the information sequence back to the text file
P = 1
The random interval function is called to select the pixels
[the row, col] = randinterval (ste_cover len_toal, key)
For I = : len_toal
If bitand (ste_cover (row (I), col (I)), 1) = = 1
Fwrite (FRR, 1, bit1)
The result (p, 1)
The else
Fwrite (FRR, 0, bit1)
The result (p, 1) = 0
The end
If p = = len_total
break
The end
P = p + 1
The end
Fclose (FRR)
File list (Check if you may need any files):
Download