Randomized fractal compression algorithm combined with classified blocks and adjacent area
Yan Ma · Jisuanji gongcheng yu sheji · 2007
The serious square-effect and reason in the randomized fractal compression algorithm is analyzed and the improved algorithm is presented. The domain and range blocks are partitioned into three groups according to their variance: Shade,edge and midrange. For each range block,it first searched the domain block that is adjacent to the range block and same type with the range block. The method recorded it while the threshold condition is satisfied. If not satisfied finding other domain blocks by using randomized fractal compression algorithm. The experiments show that the encoding time while retaining the quality of reconstruction image is reduced and the square-effect is decreased.