针对零树量化编码后出现了许多连续的次要系数根这一特点 ,提出了一种非常有效的零游程的编码方案 ,主要包括 :采用变长零游程 ,游程编码与零树编码统一进行 ,一次完成。实验表明 ,图像经该方法游程编码后压缩比得到了很大的提高

Image Compression Run-length Coding Based on Zerotree of Wavelet Coefficients Zhang Suwen Hang Xiaoqing Liu XiaojunAn effective compression run-length coding bas ed on zerotree of wavelet coefficients for many consecutive zerotree root is propo sed. It mainly includes run-length-changeable coding and the simu ltaneous encoding of run-length and zeroterr. Experimental results shows that e ncoding of this method can obtain higher compression rations.wavelet transform; image coding; zerotree qu antization; run-length coding(RLC)