余弦与小波变换在图像压缩中的比较

广东工业大学学报 ›› 2008, Vol. 25 ›› Issue (1): 24-27.

余弦与小波变换在图像压缩中的比较

广东工业大学应用数学学院；广东工业大学应用数学学院广东广州510090；广东广州510090；

出版日期:2008-01-01 发布日期:2008-01-01

A Comparison between Image Coding Methods Based on DCT and DWT

(Faculty of Applied Mathematics,Guangdong University of Technology,Guangzhou 510090,China)

Online:2008-01-01 Published:2008-01-01

摘要/Abstract

摘要： 基于变换域编码中应用最广的是离散余弦变换(DCT)和小波变换(DWT).小波的迅速发展给传统DCT提出了严峻考验.DCT算法有新发展:内嵌法、策略性重组的引进使其具有类似小波的特性,如ESDCT在对某些图像压缩还优于小波的SPIHT,故DCT的优良特性使其在图像压缩中仍然有广阔的应用前景.实际上,变换域压缩的主要因素在于量化器与熵编码器,DCT与DWT各有优势,在应用中可根据不同需要进行合理的选择. 更多还原

关键词: 变换域；离散余弦变换；小波变换；

Abstract: Coding based on transform domain is widely used in image compressing.But the rapid development of wavelet gives a stern test to traditional DCT.The DCT algorithm also has new advances: after reorganizing coefficients or embedding,DCT’s property is similar to wavelet’s.With its own fine characteristics DCT still hold broad application prospects in the image compression.In fact,primary factor for the transform domain compression lies in the quantizer and the entropy encoder.DCT and DWT have their ...

Key words: transform domain； discrete cosine transform(DCT)； discrete wavetet transform(DWT)；

李伶俐；王福龙；谭远强； . 余弦与小波变换在图像压缩中的比较[J]. 广东工业大学学报, 2008, 25(1): 24-27.

Li Ling-li,Wang Fu-long,Tan Yuan-qiang . A Comparison between Image Coding Methods Based on DCT and DWT[J]. Journal of Guangdong University of Technology, 2008, 25(1): 24-27.

参考文献

[1] 邱自华,陈宇拓,韦冰,丁灿剑. 一种改进的SPIHT图像编码方法[J]. 计算机与数字工程. 2007(04)

[2] 徐蕾. SPECK图像编码的改进算法[J]. 信息技术. 2006(12)

[3] 王冬梅,王秀芳,路敬祎. 基于小波零树图像编码算法的改进[J]. 计算机与数字工程. 2006(11)

[4] 朱向军,朱善安. 基于小波变换的嵌入式图像编码算法的综述[J]. 信号处理. 2004(01)

[5] 陈军,吴成柯. 基于DCT变换的内嵌静止图像压缩算法[J]. 电子学报. 2002(10)

[6] 赵德斌,张大鹏,高文. 基于层次 DCT变换的嵌入式图像编码方法(英文)[J]. 软件学报. 2001(09)

[1] (美)RafaelC.Gonzalez,(美)RichardE.Woods,(美)StevenL.Eddins著,阮秋琦等译.数字图像处理[M]. 电子工业出版社, 2005

[2] (美)AlbertBoggess,(美)FrancisJ.Narcowich著,芮国胜,康健等译.小波与傅里叶分析基础[M]. 电子工业出版社, 2004

[1] Cho N I,,Lee S U.Fast algorithm and mplementation of2DDCT. IEEE Transactions on Circuits and Systems . 1991

[2] Xiong Z,Guleryuz O G,Orchard M T.A DCT-based embedded image coder. IEEE Signal Processing Letters . 1996

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed