Improving the performance of the quadtree-based image approximation via the generalised DCT

Wu, Huiyi; King, Robert A.; Kitney, R.I.

doi:10.1049/el:19930592

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“…There have been several applications of quadtrees to image compression (e.g. [9,12]). These typically involve dividing an image into blocks such that some type of averaging can be performed in the block without introducing too much error.…”

Section: Introductionmentioning

confidence: 99%

Image compression for fast wavelet-based subregion retrieval

Poulakidas

Srinivasan

Eğecioǧlu

et al. 2000

Theoretical Computer Science

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In an image browsing environment there is need for progressively viewing image subregions at various resolutions. We describe a storage scheme that accomplishes good image compression, while supporting fast image subregion retrieval. We evaluate analytically and experimentally the compression performance of our algorithm. We also provide results on the speed of the algorithm to demonstrate its e ectiveness, and present an extension to a client=server environment.

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Section: Introductionmentioning

confidence: 99%