Normally I would ask you to post what you have tried already. But in this case, as far as I understand US law (which isn't much), you're not allowed to shared encryption methods. (and this site is governed by US law, so even if neither of us is in the US, it still applies) I would really like someone from Mathworks to confirm that this is indeed the case. It is not in the EULA, because it already is in the law, but seeing as it is a non-obvious thing for most people, it would be nice if they mentioned that you're not allowed to share stuff about encryption.
Also, AES doesn't care what it is encrypting, so you can just feed your image as a binary stream to some implementation you'll find if you try your favorite internet search engine.
