Urban Alphabets lets you capture letters in urban spaces around you and reuse the typographical elements to write your own urban Postcard.
This app is part of a Master's thesis research at Media Lab Helsinki. It is an app prototype that is available for research purposes in the App Store. The app will be upgraded in future and be available in different languages as well.
Some notes about the current challenges in the User Interface:
Cropping-screen: The first finger touching the screens determines the upper left corner of the cropping-rectangle. The second finger then changes the size.
Alphabets-screen, postcard screen: double tapping brings you to the menu screen.