Hello, I am a computer engineer; I glad to do your job. I am an expert in Information Security, Web Security, Network Security, also web programming (PHP, ASP) , Programming (JAVA, jsp, C#, ..) , node.js, database(mysql), web service etc...
you will digital image watermarking to embedding image that protect the copyright of the image and set some secret informative into the image and we as owner can detect that image as our own I will stenography or others best open source code to do what you want. I had done my own stenography project on c# but I can record it on java android I will give you the best solution due my experts in security, cryptography, java and android ....... Only chat with me to discuss more details my offer is best to you with my experts and commitment... Waiting your acceptance to start working.. I am very interested in your project and wish to do it ..
Best Regards