A QUADTREE-BASED EMBEDDED BLOCK CODER FOR SCALABLE IMAGE COMPRESSION

摘要

In this paper, we propose a simple but efficient wavelet-based embedded image coder that employs a modified quadtree partitioning. The proposed scheme includes multi-level dyadic wavelet decomposition, division of resolution layers, raster scanning within each sub-hand, quadtree partitioning according to the parent-children relationship, and adaptive arithmetic entropy coding. Although the proposed scheme is simple, it produces a bitstrcam with a rich set of features, including resolution and SNR scalability together with the embedded nature. Experimental results demonstrate that the new scheme is quite competitive to and often,out-performs other good image coders in the literature.