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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．
As a kind of image coding method with high compression ratio, fractal square coding (FBC) is receiving more and more attention. The Fractal Square Coding (FBCRD) in Yu Yu domain is an improvement to the basic FBC, which makes the decoding iterations and computation time greatly reduced under the condition of the same coding efficiency and restored image quality. In this paper, we propose a fast decoding iteration structure for FBCRD, which makes the decoding iteration process further optimized. Experiments show that the total decoding time is much shorter than the FBCRD of both basic FBC and non-fast decoding structures. This provides an effective algorithm for the application of fractal image coding to real systems.