一种基于DFT的数字图像压缩算法  

Digital image compression arithmetic based on the discrete Fourier transform

作　　者：姚军财[1] 

机构地区：[1]陕西理工学院物理与电信工程学,陕西汉中723000

出　　处：《陕西理工学院学报（自然科学版）》2012年第3期22-26,共5页Journal of Shananxi University of Technology:Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2011JE012);陕西省教育厅专项科研基金资助项目(2010JK463)

摘　　要：根据图像傅立叶变换域频谱系数特征,提出了一种基于DFT的数字图像压缩算法,并通过仿真实验对图像进行了不同压缩比的压缩。实验结果表明:衡量编码压缩质量的5个参数和评价压缩图像逼真度的参数均达到较好效果,且即使图像压缩比为119.137 9时,峰值信噪比仍能达到27.684 7。而且从直观上,人眼在一定的视觉误差范围内仍能接受压缩图像,表明提出的基于DFT的图像压缩算法是一种有效的、较好的图像压缩技术。According to the characteristics of the image Fourier transform coefficients, a digital im- age compression arithmetic based on the discrete Fourier transform was proposed, and simulation experi- which reflected the quality of the encoding and PSNR which estimated fidelity all achieved better results under different compression ratios. And even when the compression ratio was 119. 137 9, PSNR was able to get to 27. 684 7. And human eyes could still accept intuitively compressed image within the acceptable error range, which showed that the proposed image compression scheme was an effective and better image compression technology.

关 键 词：傅立叶变换 图像压缩 冗余度 

分 类 号：TN941[电子电信—信号与信息处理] TP391[电子电信—信息与通信工程]