Research Article
A New Method of Image Steganography Using 7th Bit of a Pixel as Indicator by Introducing the Successive Temporary Pixel in the Gray Scale Image
Pseudocode 2
Retrieval of the Message.
(1) | S = Read stego.tif image %Read the stego image in S matrix | (2) | [row, col] = size (S); %Find row and column of the stego image | (3) | load N; %Load the message length | (4) | k = 1; %Initialize the value of k by 1 | (5) | m = 0; %Initialize m matrix to zero | (6) | Repeat i = 1: row | (7) | Repeat j = 1: col | (8) | if k < N | (9) | m (k) = 2nd bit of S, i.e. (S (i, j),2); | (10) | m (k + 1) = 2nd bit of the next pixel of S, i.e.(S (i, j) +1, 2); | (11) | k = k + 2; | (12) | end | (13) | end | (14) | end | (15) | m; | (16) | M = reshape (m,8,[]); | (17) | Convert M into a character stream; |
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