| 一种基于DFT的数字图像压缩算法 |
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| 引用本文： | 姚军财.一种基于DFT的数字图像压缩算法[J].陕西理工学院学报(自然科学版),2012,28(3):22-26. |
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| 作者姓名： | 姚军财 |
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| 作者单位： | 陕西理工学院物理与电信工程学,陕西汉中,723000 |
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| 基金项目： | 陕西省自然科学基金资助项目，陕西省教育厅专项科研基金资助项目 |
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| 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。
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| 关 键 词： | 傅立叶变换 图像压缩 冗余度 |
Digital image compression arithmetic based on the discrete Fourier transform |
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| YAO Jun-cai.Digital image compression arithmetic based on the discrete Fourier transform[J].Journal of Shananxi University of Technology:Natural Science Edition,2012,28(3):22-26. |
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| Authors: | YAO Jun-cai |
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| Institution: | YAO Jun-cai(School of Physics and Telecommunication Engineering,Shaanxi University of Technology, Hanzhong 723000,China) |
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| Abstract: | According to the characteristics of the image Fourier transform coefficients,a digital image compression arithmetic based on the discrete Fourier transform was proposed,and simulation experiments of image compression were made for different compression ratios.Experimental results showed that the parameters of the entropy of image,the average codeword length,coding efficiency,redundancy 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. |
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| Keywords: | discrete Fourier transform image compression redundancy |
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