A first digital image is acquired of a framed area while illuminating the background and foreground object under a first lighting condition. A second digital image is then acquired of the same framed area while illuminating the background and foreground object under a second lighting condition. Preferably,...http://www.google.com.au/patents/US8134576?utm_source=gb-gplus-sharePatent US8134576 - Method and apparatus for background replacement in still photographs
