【作者】 李小红； 蒋建国； 郭太峰； 詹曙；

【Author】 Li Xiaohong Jiang Jianguo Guo Taifeng Zhan Shu School of Computer Science&Information Engineering,Hefei University of Technology,Hefei,230009,China

【机构】 合肥工业大学计算机与信息学院；

【摘要】 图像压缩是图像传输的重要组成部分,是提高图像传输效率的重要保证。本文研究了基于小波变换零树编码的图像压缩方法,编程实现 EZW 扫描,并考虑人类视觉系统的因素提出改进算法, 根据重要性对不同的子带进行基于人眼视觉特性的加权,从而实现了多阈值的 EZW 扫描。实验仿真证明,这种改进零树编码方法简单有效,并能在一定程度上提高图像压缩效率和编码质量。更多还原

【Abstract】 Image compression is an important part of the image transmission,and it ensures the high transmission ratio in order to put it for practical use.In this paper,the wavelet transform and algorithm of EZW was discussed.With corresponding experiments,a new scan algorithm based on HVS was introduced to shorten the code stream and improve subjective feeling.Experimental results indicate that the improved wavelet zero-tree coding algorithm can improve the efficiency and quality of compressed images to some extent.更多还原