Image understanding starts from recognizing the
wide variety of patterns of image patches at different locations
and resolutions. It is therefore useful to understand statistical
properties and construct statistical models of image patches of
natural scenes. Natural image patches can be roughly classified
into three regimes: stochastic textures, object shapes or textons,
and geometric lines and regions. In this talk, I will explain that
these three different regimes can be unified by what we call
information scaling, i.e., the change of statistical properties of
image data over the change of resolution. Moreover, the three
regimes of patterns can be modeled within a unified framework of
what we call information projection, i.e., iteratively projecting
the current model onto a manifold of distributions to obtain an
updated model. The talk is based on joint work with Song-Chun Zhu
and Cheng-en Guo.