Abstract
Texture enhancement presents an ongoing challenge, in spite of the considerable progress made in recent years. Whereas most of the effort has been devoted so far to enhancement of regular textures, stochastic textures that are encountered in most natural images, still pose an outstanding problem. The purpose of enhancement of stochastic textures is to recover details, which were lost during the acquisition of the image. In this paper, a texture model, based on fractional Brownian motion (fBm), is proposed. The model is global and does not entail using image patches. The fBm is a self-similar stochastic process. Self-similarity is known to characterize a large class of natural textures. The fBm-based model is evaluated and a single-image regularized superresolution algorithm is derived. The proposed algorithm is useful for enhancement of a wide range of textures. Its performance is compared with single-image superresolution methods and its advantages are highlighted.
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