posted on 2007-01-01, 00:00authored byJean-Francois Lalonde, Alexei A Efros
Why does placing an object from one photograph into
another often make the colors of that object suddenly look
wrong? One possibility is that humans prefer distributions
of colors that are often found in nature; that is, we find
pleasing these color combinations that we see often. Another
possibility is that humans simply prefer colors to be
consistent within an image, regardless of what they are. In
this paper, we explore some of these issues by studying the
color statistics of a large dataset of natural images, and
by looking at differences in color distribution in realistic
and unrealistic images. We apply our findings to two problems:
1) classifying composite images into realistic vs. nonrealistic,
and 2) recoloring image regions for realistic compositing.