Properties of Brownian Image Models in Scale-Space

  • Kim S. Pedersen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2695)


In this paper it is argued that the Brownian image model is the least committed, scale invariant, statistical image model which describes the second order statistics of natural images. Various properties of three different types of Gaussian image models (white noise, Brownian and fractional Brownian images) will be discussed in relation to linear scale-space theory, and it will be shown empirically that the second order statistics of natural images mapped into jet space may, within some scale interval, be modeled by the Brownian image model. This is consistent with the 1/f 2 power spectrum law that apparently governs natural images. Furthermore, the distribution of Brownian images mapped into jet space is Gaussian and an analytical expression can be derived for the covariance matrix of Brownian images in jet space. This matrix is also a good approximation of the covariance matrix of natural images in jet space. The consequence of these results is that the Brownian image model can be used as a least committed model of the covariance structure of the distribution of natural images.


White Noise Gaussian White Noise Natural Image Stochastic Function Spatial Covariance Function 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Kim S. Pedersen
    • 1
  1. 1.DIKUUniversity of CopenhagenCopenhagenDenmark

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