Abstract
This chapter presents some results on stochastic tree languages and their application to image modeling, in particular to texture modeling. An image is described as a composition of its components, called sub-images and primitives. In recent years, stochastic languages have been used in the modeling of image structures. For one-dimensional signal and line patterns, the one-dimensional string representation appears to be quite natural and efficient. However, for two-dimensional images and three-dimensional scenes, an extension from the one-dimensional string language approach to higher dimensions will often result in a more efficient representation. One natural extension of one-dimensional string languages to high-dimensional languages is tree languages. A string could be regarded as a single-branch tree. The capability of having more than one branch often gives trees a more efficient image representation. The probability distribution of the trees representing images can be used to model the noisy situations.
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