【摘要】 根据图像子块的像素分布特征,提出了一种基于方差和DCT变换的混合快速分形图像编码算法,并在此基础上引入了平滑块的概念。该算法在大幅度提高分形图像编码速度的同时,很好地改善了压缩率和解码图像的质量。实验表明该方法具有优良的性能,在编码时间优于方差快速编码方法的前提下,解码图像的质量和压缩率可以好于基本分形图像编码算法。更多还原

【Abstract】 According to the pixel distribution feature of the sub-images,this paper proposed a fast fractal image coding algorithm based on variance and DCT transformation,moreover,the definition of the average block was addressed and utilized to improve the above combined algorithm.Experimental results show that the novel algorithm can improve the compression ratio and decode quality much and need less coding time than the variance based fractal coding algorithm.更多还原