Google uses game to get good image metadata with Image Labeler

Google's new Image Labeler service is a game that asks you and a random partner somewhere on the Internet to come up with tags to describe an image. The tags you two independently create are applied to the picture. This simple game corrects for many kinds of bogus or poorly thought-out entries (though it will limit the aggregate intelligence of the two raters to the lowest of the two). This is at least the second time I've seen this approach to getting metadata for images — what Tim O'Reilly calls "bionic software" that's part human, part machine.

You'll be randomly paired with a partner who's online and using the feature. Over a 90-second period, you and your partner will be shown the same set of images and asked to provide as many labels as possible to describe each image you see. When your label matches your partner's label, you'll earn some points and move on to the next image until time runs out. After time expires, you can explore the images you've seen and the websites where those images were found. And we'll show you the points you've earned throughout the session.