Green Screen Native Android App

Hello developers,

I need your help to build a Green Screen Native Android App.

The core requirements of the app are:

1. The app should have custom camera functionality that can take picture both front and rear view.
2. Once the user is happy with the photo, they will be provided with different backgrounds to add with the user chosen photo.

So basically the taken photos background should be changed with the provided background image. here only the background will be changed but user's face and body will be remain as it it.
OpenCV library usage will be preferable. Or you can tell me what library files or custom code you are going to use?

The app should be run on both portrait and landscape view. The app should take, preview on this both orientations. The app should support all version of Android OSs from Froyo to Lollipop.

Further requirements and details will be provided to the selected applicant.

To win the project you have to proof you can do the job by providing similar apps and practical interview session from code level.

Selected candidate has to sign NDA and need to provide all the source code, technical documentation and open source library details and agreements.

Candidate who are happy to do this please apply.

It's an URGENT job.