Making soup, the smart phone way

Yasmina, a student at the University of Rochester in New York, is in the mood for some soup. New Scientist tells how she proceeds:
She opens her cupboard where she knows the coconut milk she needs is sitting on the shelf amongst other canned goods. Instead of reaching for the right can, she hesitates. Yasmina is blind. She holds her iPhone to the open cupboard, snaps a picture of the cans, makes