a unity application - dressing a person with a shirt

The application that we will insert a picture of a person with an opaque background. The app will be able to get from the picture the measurements of the person. We will insert to the database pictures of shirts with opaque background that I'll photograph. We shall make sure that the picture of the shirt match accurately the person picture. The app will know to dress the shirt on the person automatically (in fact putting the person's picture as a first layer and the shirt's picture as a second layer). The app will know how to position the shirt by the shoulders. There will be the option to scroll down and choose different shirts from the list.