余域中分形方块编码的一种快速解码结构

A Fast Decoding Structure for Fractal Block Coding in Residue Domain

分形方块编码（ＦＢＣ）作为一种具有高压缩比潜力的图像编码方法，正受到越来越多的关注．余域中的分形方块编码（ＦＢＣＲＤ）是对基本ＦＢＣ的一种改进，它使得在编码效率及恢复图像质量基本不变的情况下，解码的迭代次数和计算时间大为减少．本文针对ＦＢＣＲＤ又提出一种快速解码迭代结构，使得解码迭代过程进一步优化．实验表明，总的解码计算时间比基本的ＦＢＣ和非快速解码结构的ＦＢＣＲＤ都大大地减少了．这为分形图像编码应用于实际系统提供了一种有效的算法．

The interest in Fractal Block Boding (FBC)has been steadily growing for its high compressionpotential. Fractal Block Coding in Residue Domain (FBCRD)is a modification of basic FBC which leads to feweriterations and less decoding bine at the decoder while maintaining almost the same coding efficiency and imagequality. This paper further presents a fast decoding structure for FBCRD. Experiments show that the total decoding bine is lugly reduced in comparison with basic FBC and FBCRD without fast decoding structure. This improvement provides us with an effective algorithm for real applications of fractal image compression.