图像压缩算法的研究

JIMI

论文编号ZXX447  论文字数:9335,页数:32  附任务书，开题报告，外文翻译，程序
图像压缩算法的研究
摘要：随着电子计算机和数码产品技术不断提高，人们对各种数码图像的存储需求越来越大，所以，对图像的压缩是必不可少的。图像的压缩，可以使人们用更少的空间来存储大量的图片，尤其在网络通信中，有极其重要的作用。图像压缩的方式有许多，可以根据图像本身属性，使用不同种类的压缩方式，以达到最佳的图像压缩效果。
 本次设计主要是使用游程编码的方法对二值图像进行无损压缩，有效的对二值图像进行了压缩，并且对压缩后的图片进行了解压缩处理，无损的还原了图像。
 本次设计是使用Delphi7.0进行编译的，主要功能是对导入的彩图进行处理，二值化图像，使得图像适应于压缩，再通过游程编码压缩算法，对图像进行无损压缩。对于压缩效率的比较，可以通过灰度处理图像来进行压缩，从而比较出压缩算法的适应性。本软件界面简洁，操作方便，并且充分体现了对二值图像的压缩效率。
关键词：图像压缩，游程编码，Delphi
A Study about the Image Compression Algorithm
Abstract: With the computer and digital products technology continues to improve, people of various digital image storage requirements increasing, so the image compression is necessary. Image compression, allows people to use less space to store a large number of images, especially in network communication, it plays a very important role. There are many image compression methods, can attribute the image itself, using different types of compression to achieve the best image compression.
 This design mostly using run-length coding method for lossless compression of binary images, do an effective binary image compress, and on the compressed picture to  decompression, lossless reduction of the image.
 This design is compiled using Delphi7.0, the main function is to be processed into the color pictures, to image binarization, making the image suitable for compression, and through run-length encoding compression algorithm for lossless image compression. For comparison of compression efficiency, image processing can be carried out through the gray-scale processing, compression algorithm to compare the adaptability. The software interface is simple, easy to use, and fully reflects the binary image compression efficiency.
Keywords: Image compression, run-length encoding,Delphi
目   录
1  绪论
 1.1 选题的依据及意义 1
 1.2 图像压缩的发展历史与前景 1
 1.3 图像压缩在图像处理中的应用 3
2  图像压缩原理
 2.1 图像压缩原理概述 4
 2.2常用的图像压缩原理简介 4
3  图像压缩软件设计
 3.1   软件设计结构 7
 3.1.1游程编码压缩原理 7
 3.1.2 功能实现方式 7
 3.2   软件基本功能简介 8
 3.2.1 图像灰度处理 8
 3.2.2 图像二值处理 10
 3.2.3 图像压缩处理 13
 3.2.4 图像解压处理 16
 3.2.5 图像压缩对比 17
4  功能调试与结果分析
 4.1  程序代码调试 18
 4.2  图像压缩结果分析 18
5  总结与展望 21
参考文献 22
致谢 23
附录A  24