电信科学 ›› 2011, Vol. 27 ›› Issue (7): 86-89.doi: 10.3969/j.issn.1000-0801.2011.07.020

• 研究与开发 • 上一篇    下一篇

一种基于改进的SOFM神经网络的图像无损压缩方法

陈善学1,王佳果1,彭娟1,张本强2   

  1. 1 重庆邮电大学移动通信安全技术实验室 重庆 400065
    2 中兴通讯股份有限公司 深圳 518057
  • 出版日期:2011-07-15 发布日期:2011-07-15
  • 基金资助:
    国家科技重大专项基金资助项目;国家自然科学基金资助项目;重庆市科委自然科学基金资助项目

A Image Lossless Compression's Algorithm Based on the Improved SOFM

Shanxue Chen1,Jiaguo Wang1,Juan Peng1,Benqiang Zhang2   

  1. 1 Chongqing University of Posts and Telecommunications， Mobile Communication Security Technology Laboratory，Chongqing 400065，China
    2 Zhongxing Telecommunication Equipment Corporation，Shenzhen 518057，China
  • Online:2011-07-15 Published:2011-07-15

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摘要：

在介绍矢量量化和自组织特征映射神经网（SOFM）的基础上，针对SOFM算法的特点对其进行了几个方面的改进，提高了SOFM网络的性能。采用改进后的基于SOFM的矢量量化技术对图像进行无损压缩编码，码书设计时间减少了约70%，图像效果、编码质量均有所提高，实验结果表明了本算法的压缩比比传统的差值编码（DPCM）无损压缩最高可提升40%，证明了算法的有效性。

关键词: 自组织特征映射, 矢量量化, 码书设计, 无损压缩

Abstract:

The theories of vector quantization（VQ）and self-organizing feature mapping（SOFM）neural networks are introduced in this paper firstly.Some aspects are improved based on VQ of SOFM.The lossless compression algorithm is researched and simulated on the improved SOFM.Codebook design time is reduced by about 70%,and effect of coding image quality is also improved.The compression ration increases 40% in comparison with differential pulse code modulation（DPCM）.The results of the experiment illustrate the rationality and efficiency of the algorithm.

Key words: self-organizing feature mapping, vector quantization, codebook design, lossless compression

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