Facial Expression Transfer [closed] - algorithm

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Given an input-image & an expression-image. I want to put the expression(smile,laugh,anger,etc) into input image. I have tried some logics using opencv & dlib. But couldnot generate any good result.
Method tried:
A. 1). Fetch landmark points of two faces. 2). Fetch the region of interest(whole face / lips / eyes /etc) 3). Use opencv shape transformation. Warp the ROI based of landmark-points-match 4). Put back the warped-ROI back into original image.
B. The ML project on git https://github.com/datitran/face2face-demo says to transfers expressions to only a specific person for which it is trained. But I want to have some generic.
Any guidance on what should be the correct/better path to take; Is there any known library ?

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I was looking for a tool that can help me draw the circuit that I have created more like the one in the following link.
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