基于零树和位平面的小波图像压缩算法

An Image Wavelet Compression Algorithm Based on Zerotree and Bit Plane

通过有机结合零树编码、位平面编码和算术编码,提出了一种基于零树和位平面的小波图像压缩算法ZBP(Zerotree and bit plane).ZBP不仅充分利用了零树符号之间的相关性,而且从位数据的层面上挖掘出了小波系数值之间的相关性,从而提高了算术编码的性能.实验结果表明,ZBP的压缩效果优于目前已有的小波图像压缩算法.

By combining Zerotree, bit plane and arithmetic coding together, a new image compression algorithm based on Zerotree and bit plane called ZBP is presented in this paper. ZBP exploits the correlation among the Zerotree symbols and the bit data of wavelet coefficients, so the efficiency of arithmetic coding is improved. Experimental results demonstrate that ZBP performs better compression than the existing wavelet imagecompression algorithms.