Google Portrait is a web-based demonstration system of IDIAP face detection technology.
The user must enter the name of a person. This query is then sent to Google Images and the resulting images are downloaded and processed (face detection) on-the-fly, before display. Each detected face can then be tagged by the user.
URL: http://www.idiap.ch/googleportrait
Note: Besides using Google Images to retrieve the URLs of the images, this demonstration has no official link with Google. It's very likely that the name will change in the future.
Example of the result of the query "Tom Cruise":

Interface used to tag the faces:
