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“Advances in digital photography have made it possible to capture
large collections of high-resolution images and share them
on the internet. While the size and availability of these collections
is leading to many exciting new applications, it is
also creating new problems. One of the most important of
these problems is privacy. Online systems such as Google
Street View allow users to interactively
navigate through panoramic images of public places created using
thousands of photographs. We believe
that an attractive solution to the privacy problem is to remove the
identities of people in photographs by automatically replacing their
faces with ones from a collection of stock images. Automatic face replacement has other compelling applications as
well. For example, people commonly have large personal collections
of photos on their computers. These collections often contain
many photos of the same person(s) taken with different expressions,
and under various poses and lighting conditions. One can use such
collections to create novel images by replacing faces in one image
with more appealing faces of the same person from other images.
For group shots, the burst mode available in most cameras can
be used to take several images at a time. With an automatic face
replacement approach, one could create a single composite image
with, for example, everyone smiling and with both eyes open.” source...