Hybrid Fractal Image Coding Method Based on Nonlinear Model
XU Xiao-xian · Kongzhi yu juece · 2001
A nonlinear model is presented to generalize 8 kinds of symmetric transformations of classical fractal coding. The selection process of domain block and transformation way is speeded up by means of defining eigenvalues to 64 kinds. By adopting a rapid matching strategy based on matching in neighborhood of range block, non-matching blocks are coded by truncation coding, and smooth blocks are coded by average coding. Three-level quadtree coding scheme is used. The compression performance of this method is good, especially in coding time.