Microsoft Research Group Shot

Group Shot helps you create a perfect group photo out of a series of group photos. With Group Shot you can select your favorite parts in each shot of the series and Group Shot will automatically build a composite image. This image was made up from three taken at Sarah's folks' on Christmas day - in one image one of the kids is making a silly face, but in another Brenda has a nice smile - it took about ten minutes to build the composite image. I know you can do this sort of thing in Photoshop but this automates the process entirely. I haven't played about with it much but the examples online suggest that they don't even have to be very similair so long as there are common details the algorithm can find.