在彩色图象编码技术中，普遍存在的一个问题是未能充分利用各分量间的相关性。本文针对彩色图象各分量间存在的极强的结构自相似性，提出一种基于二维ＤＣＴ的分形编码方法。此方法在采用变换编码方法去除彩色图象各分量内部冗余的基础之上，采用分形编码方法进一步去除了存在于三分量之间的冗余信息。仿真结果表明，这种编码方法的效率明显优于ＪＰＥＧ基本彩色系统的编码效率。 A common problem in color image coding techniques is the failure to take full advantage of the correlation between the various components. In this paper, aiming at the strong self-similarity of the components of color image, a fractal coding method based on two-dimensional DCT is proposed. This method uses the transform coding method to remove the internal redundancy of the color image components, and uses the fractal coding method to further remove the redundant information existing between the three components. Simulation results show that the efficiency of this coding method is obviously better than that of JPEG basic color system.