Abstract: This paper proposes an improved method based on Jacquin theory to against the tradition way. It reduces encoded block number through classifying blocks with detail block and non-detail block, shortens encoding time and enhances compression rate in small scale block. Experimental result displays the number of encoded block reduces to 1/3 and the encoding time reduces to 2/3.

Key words: image compression, fractal encoding, Jacquin encoding, detail block encoding

摘要： 针对现有方法在编码含丰富细节信息的图像时编码时间长，编码小尺度子块时压缩率不高的缺点提出改进方法。该方法是基于Jacquin编码的理论，采用对编码子块划分为细节和非细节部分子块的方法，从而减少编码子块的数量，缩短编码时间，提高在小尺度子块划分下图像的压缩率。结果证明，对于含丰富细节信息的图像，子块数量减少到1/3，编码时间缩短1/3。

关键词: 图像压缩, 分形编码, Jacquin编码, 细节子块编码

CLC Number: 

• TN919.8