数字图像压缩编解码的设计实现

JIMI

论文编号ZXX401  论文字数:12585,页数:37
摘要
 随着通信技术及计算机软硬件的高速发展，数字图像压缩编解码技术的逐渐成熟，实时图像处理在多媒体、HDTV、图像通信等领域有着越来越广泛的应用，图像压缩处理技术也已成为多媒体技术的核心。文章从当前数字图像压缩编解码技术的发展趋势，提出了Huffman编解码在图像压缩处理技术方面的重要性及可行性。之后对数字图像压缩处理的设计进行了详细的描述，尤其是对Huffman编解码给出了测试数据、综合后的实现结果及在VC6.0编程环境中的调试。同时对JPEG基本模式中的主要算法，诸如颜色模式转换及采样，二维DCT变换，量化等也给出了基本解决方法。调试和运行结果表明: 用Huffman编解码来实现图像的压缩处理，达到了较高的压缩比，在速度和资源利用率方面均达到了较优的状态，可满足实时JPEG图像编解码的要求。
 
关键词：数字图像压缩，Huffman，编码，解码
ABSTRACT
 With the rapid development of the communications technology and the computer hardware and software, digital image compression code and decode technology are gradually becoming mature. Real-time image processing in multimedia, HDTV, image communication and other fields have been in increasingly wide application, at the same time, the image compression technology has become the core of the multimedia technology. Based on the current development trends of the digital image compression code and decode technology，this article introduced the importance and the feasibility of Huffman coding and decoding in image compression technology. Then the compressions of digital images of the design are described in detail, particularly the test data for Huffman coding and decoding. Consolidated results and the achievement in the VC6.0 programming environment debugging. JPEG in the article is the basic mode of the main algorithm, Such as the change and sampling of color in the mode, the change of 2D DCT, quantitative and so on also given basic solutions. Huffman coding and decoding are entire design and its various modules are debugging and running in VC6.0 programming environment. Debugging and the results show that : Huffman code used to achieve the right JPEG and other image compression, achieve a higher compression ratio, the speed and efficiency of resource utilization are equal to the optimum state, can meet the requirements of the real-time JPEG image coding.
 
Keywords: Digital image compression, Huffman, encoding, decoding
 目录 
 
摘要 I
ABSTRACT II
第1章 绪论 1
1.1 编解码在数字图像处理中的重要意义 1
1.2 课题的研究内容 3
1.3 论文的组织结构 3
第2章 设计工具简介 4
第3章 Huffman编解码的设计原理 5
3.1 Huffman编码方法 5
3.2 Huffman编码中要注意的问题 5
3.3 Huffman解码方法 6
3.4 Huffman编解码的应用 6
第4章  数字图像压缩编解码的设计实现 7
4.1 颜色转换及采样 7
4.2 DCT变换 7
4.3 量化 8
4.4 Huffman编解码的程序实现 8
4.4.1 采用 Huffman编解码的原因 8
4.4.2 编码、解码的实现 9
4.4.2.1 程序主体框架概述 9
4.4.2.2 统计字符出现概率 9
4.4.2.3 Huffman树的构造 10
4.4.2.4 生成代码表并实现压缩 11
4.4.2.5 解码 15
第5章 总结 19
致谢 21
参考文献 22
附录 程序 23