I am working on a project which can encode some data in an Image and share it with other people by printing it out as hard copy. Now, other people can take a picture of the hard copy they got and decode the data.
I started researching on it and found some efficient projects like Mobistego which can encode and decode any image very effectively.
But the thing is, I wanted to use my Android phone's camera to take random shots and compare with a pre stored image and decode the data.
Other way possible can be like using some image recognition algorithm.