Embedding camera readable data on an image [closed]

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I have a set of images on a data set and I want to create an application(on android initially) so that the application would be able to take an image and match it with an image on my data set. I tried using image recognition algorithms but I had very poor recognition chances. Is there any way to unobtrusively embed data on the image itself such that when a printed version of the image is scanned by the application, it would be able to extract the embedded data? I need some direction in this regard because I seem to be punching in the dark since I haven't worked on anything like this before.

Thanks

Answer 1

You can try with OpenCV4Android, here is the introductory tutorial. Following SO will give you some more- Looking for OpenCV android tutorial