| 采用离散小波变换和游程长度编码的图像压缩与恢复 |
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| 引用本文： | 蒋正金,张长江,端木春江. 采用离散小波变换和游程长度编码的图像压缩与恢复[J]. 浙江师范大学学报(自然科学版), 2012, 35(2): 155-160 |
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| 作者姓名： | 蒋正金 张长江 端木春江 |
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| 作者单位： | 浙江师范大学数理与信息工程学院,浙江金华,321004 |
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| 摘 要： | 为研究图像的压缩与恢复技术，提出了采用离散小波变换和游程长度编码实现图像的压缩与恢复．首先将原图进行3层离散小波分解，然后对分解后的子图分别采用游程长度编码实现图像压缩，最后进行游程长度解码和离散小波反变换实现图像恢复．通过对4张标准测试图像的MATLAB实验仿真，证明了该方法具有较高的压缩率和较小的压缩误差，尤其适合于邻度像素灰度值相关性高的图像．
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| 关 键 词： | 离散小波变换 游程长度编码 图像压缩与恢复 MATLAB |
Using discrete wavelet transform and run length encoding to realize image compression and recovery |
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| JIANG Zhengjin , ZHANG Changjiang , DUANMU Chunjiang. Using discrete wavelet transform and run length encoding to realize image compression and recovery[J]. Journal of Zhejiang Normal University Natural Sciences, 2012, 35(2): 155-160 |
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| Authors: | JIANG Zhengjin ZHANG Changjiang DUANMU Chunjiang |
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| Affiliation: | JIANG Zhengjin,ZHANG Changjiang,DUANMU Chunjiang(College of Mathematics,Physics and Information Engineering,Zhejiang Normal University,Jinhua Zhejiang 321004,China) |
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| Abstract: | In order to research the image compression and recovery technology,it was proposed a kind of discrete wavelet transform and run length encoding technology to realize image compression and recovery.First the image was decomposed into three layers,then the decomposed sub-images were encoded to realize the image compression by run length encoding,finally the run length decoding and discrete wavelet inverse transform were used to realize the image recovery.Simulation of four standard test images by MATLAB showed that this method had higher compression ratio and smaller compression error,especially suitable for the images with high correlation of adjacent degrees pixel grayscale values. |
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| Keywords: | discrete wavelet transform run length encoding image compression and recovery MATLAB |
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