H. A. Cohen. Thumbnail-based image coding utilizing the fractal transform. In Proc. ICIP-96 IEEE International Conference on Image Processing, Lausanne, 1996.
In thumbnail-based retrieval from image databased the display of any fully featured (FF-) image at a workstation is commonly preceded by ist selection from a display of reduced-size, thumbnail-based retrieval requires that the data supplied for the T-image be efficiently utilised in the production of the FF-image. In this paper we describe two image codecs based on the fractal transform that are thumbnail-based; one, called thumb fractal is a variant of block-oriented fractal coding; the other, vector quantization via fractal transform, VQFT. For both codecs signed correction tiles are derived via the fractal transform. Both codecs have as initial image the exploded thumbnail, to which VQFT applies correction tiles, while thumb fractal iteratively applies similar correction tiles to a rapid convergence. Experimental data is presented for fixed range block size of 4x4, but is indicative of results for other image blocking schemes, such as quadtree.
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@InProceedings{Cohe96,
Author = {Cohen, H. A.},
Title = {Thumbnail-based image coding utilizing the fractal transform},
BookTitle = {Proc. ICIP-96 IEEE International Conference on Image Processing},
Address = {Lausanne},
Month = {},
Year = {1996}
}