Unrecognized function or variable 'steg_lsb_enc'.

subplot(2,1,1)

imshow(imread('C:\Users\Monster\Desktop\Network Security homework\jesse pinkman.jpg'))

title('sifrelenecek resim')

subplot(2,1,2)

imshow(imread('C:\Users\Monster\Desktop\Network Security homework\walter white.jpg'))

title('orjinal resim')

[enc_img]= steg_lsb_enc('walter white.jpg', 'jesse pinkman.jpg', 2);

subplot(2,1,1)

imshow(imread('walter white.jpg'))

title('orjinal resim')

subplot(2,1,2)

imshow(enc_img)

title('icinde sifre bulunan goruntu')

[enc_img]=steg_lsb_enc('walter white.jpg', 'jesse pinkman.jpg', 7);

subplot(2,1,1)

imshow(imread('walter white.jpg'))

title('orjinal resim')

subplot(2,1,2)

imshow(enc_img)

title('icinde sifre bulunan goruntu')

Answer 1

[DGM]

I don't know of any functions called steg_lsb_enc(). I don't find anything in docs or FEX either. I'm sure I could whip up an LSB steganography tool again, but I doubt that helps you if you're expecting some existing syntax and feature conventions.

I'm assuming you got this example code from somewhere. Perhaps whatever package it came with isn't installed on the search path. If you didn't, you might want to run pathtool().

[Walter Roberson]

I suspect that you are expected to write the function.

[Mert Aydin]

With this code, I wanted to hide a photo inside the other photo. I wanted to write steganography lsb. This code is giving an error and if it doesn't work, can you give data hiding code to a photo?

[Walter Roberson]

The steganography part is the part that the assignment expects that you will study and learn how to implement. Having someone else provide the code would ruin the assignment.

[DGM]

Let me emphasize the bit about "expecting some existing syntax or feature conventions". There are any number of ways to cram some amount of image data into a single-bit channel of sufficient size. There's no guarantee that whatever ridiculous way I choose is the way you were told to do it.