一种基于小波树能量的嵌入式图像编码方法

Embedded image coding based on wavelet-tree energy

在给出小波树能量概念的基础上,针对EZW算法的特点及缺点,提出了一种新的改进算法,该算法中设计了一种新的小波树编码的扫描次序方法和有效值映射表示方法,该算法克服EZW算法不能充分利用小波变换的特点,存在树间冗余的缺陷。仿真结果表明该算法比原算法在峰值信噪比上有较大提高。

A concept “wavelet-tree energy” is offered, and based on this concept, a new improved image coding method is proposed. This method incorporates a new scanning method and virtual value mapping method. The simulation results indicate that the new algorithm greatly improves the peak signal-to-noise ratio （PSNR） of the reconstructed image compared with EZW.