Wow! I really like Google's New App called PhotoScan. It provides an easiest way to convert physical photos into digital ones with high quality.
I tried to use it to convert a printed photo. I just needed to open the app, put my smartphone over the photo, then press the start button. After that, I was required to move my smartphone to reach the white circles one by one showing on the screen as indications. It took around 30 seconds to complete the whole procedure.