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A segmentation-based predictive multiresolution image coder

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2 Author(s)
Xiaolin Wu ; Dept. of Comput. Sci., Univ. of Western Ontario, London, Ont., Canada ; Yonggang Fang

Recursive rectilinear tessellations like quadtree are widely used in image coding, but a regular tessellation, despite simple geometry, may not suit image compression because it is too rigid to reflect the scene structure of an image. The paper presents a new image pyramid formed by adaptive, tree-structured segmentation to be a framework of a predictive multiresolution image coder. Subjectively appealing compression results are obtained at different resolutions by scene-adaptive, tree-structured segmentation and by exploiting the statistical dependency between the layers of the image pyramid. The adaptive segmentation-based image coder is constructed by recursive, least-squares piecewise functional approximation. The seemingly expensive encoding process can be made efficient by an incremental least-squares computation technique. The decoding is simple and can be done in real time if assisted by existing hardware technology

Published in:

Image Processing, IEEE Transactions on  (Volume:4 ,  Issue: 1 )

Date of Publication:

Jan 1995

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