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有序抖动半调图像压缩算法
引用本文:刘欣,耿烨,李智杰.有序抖动半调图像压缩算法[J].计算机应用,2011,31(1):154-155.
作者姓名:刘欣  耿烨  李智杰
作者单位:西安建筑科技大学
基金项目:陕西省自然科学基金资助项目(2005F38)
摘    要:结合有序抖动半调图像特性,针对原有矢量量化初始码书算法存在非典型码字、运算量大和空间分布不均匀等欠缺,提出一种能在训练集中均匀分布的初始码书生成方法,应用到LBG算法中,并结合无损压缩方法,进行二次压缩。实验表明,本方法压缩比高、实现简单,且解码后图像视觉效果得到明显改善。

关 键 词:有序抖动    矢量量化    初始码书    视觉效果
收稿时间:2010-06-28
修稿时间:2010-08-10

Compression method for ordered dither halftone image
LIU Xin,GENG Ye,LI Zhi-jie.Compression method for ordered dither halftone image[J].journal of Computer Applications,2011,31(1):154-155.
Authors:LIU Xin  GENG Ye  LI Zhi-jie
Affiliation:LIU Xin1,GENG Ye2,LI Zhi-jie2(1.Network and Information Center,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China,2.School of Information and Control Engineering,Xi'an Shaanxi 710055 China)
Abstract:In combination with the characteristics of the ordered dithering halftone images,an initial codebook algorithm that can distribute uniformly in training set was proposed.To overcome the disadvantages of the existing initial codebook algorithms,the initial codebook with uniform distribution was produced,and final codebook was iteratively produced using Linde-Buzo-Gray(LBG) algorithm.The experimental results show that the new method can get better visual effect.
Keywords:ordered dither halftone  Vector Quantization(VQ)  initial codebook  visual effect  
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