how to embed image in shares if visual cryptography

i have two images A and B. Using A i created 2 shares share 1 and share 2. Now to right half of share 1 and left half of share 2 i want hide the image B. And then when i combine the encrypted shares i get to see the image B. please can someone help me

[Image Analyst]

Note: poster edited away the images so you probably won't understand this posting anymore.

Answer 1

[Image Analyst]

There is nothing in MATLAB to do that. You'll have to build it up based on lower level functions. Hopefully someone has written a paper on it, which I suspect since it looks like you got the image from a paper rather than thought it up yourself.

If a paper has been written on it, then you can probably find it here: http://www.visionbib.com/bibliography/contents.html

If no paper has been written on it and it's your completely new innovative idea, then I presume you must have some idea as to how it can be done. I just don't see how, if the images are all positive values, how you can add or average the two images and produce a hole in the middle. How did those positive noise pixels vanish? There must be something more going on than simple superposition.

http://matlab.wikia.com/wiki/FAQ#Can_you_program_up_the_algorithm_in_this_article_for_me_and_explain_it_to_me.3F