Detect if picture of picture taken in mobile app

Question

I am working on a face recognition app where the picture is taken and sent to server for recognition.

I have to add a validation that user should capture picture of real person and of another picture. I have tried a feature of eye blink and in which the camera waits for eye blink and captures as soon as eye is blinked, but that is not working out because it detects as eye blink if mobile is shaken during capture.

Would like to ask for help here, is there any way that we can detect if user is capturing picture of another picture. Any ideas would help.

I am using react native to build both Android and iOS apps.

Thanks in advance.

Answer 1

Thanks for support.

I resolve it by the eye blink trick after all. Here is a little algorithm I used:

Open camera, click capture button:

Camera detects if any face is in the view and waits for eye blink. If eye blink probability is 90% for both the eyes, wait 200 milliseconds. Detect face again with eye open probability > 90% to verify if the face is still there, and capture the picture at the end.

That's a cheap trick but working out so far.

Regards