| 基于自适应提升小波变换的图像压缩 |
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| 引用本文： | 丁绪星,朱日宏,李建欣.基于自适应提升小波变换的图像压缩[J].光子学报,2004,33(2):225-228. |
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| 作者姓名： | 丁绪星 朱日宏 李建欣 |
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| 作者单位： | 南京理工大学电光学院,南京,210094;南京理工大学电光学院,南京,210094;南京理工大学电光学院,南京,210094 |
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| 摘 要： | 介绍一种用基于提升算法的中值滤波构造自适应小波变换方法.其思想是设计自适应的“预测算子”及自适应的“更新”运算以更好的逼近信号,从而达到更“紧凑”的信号表示.实验表明,在图像压缩应用中,在峰值信噪比(PSNR)上,虽然本文算法比不上D9/7小波,但在主观评价上更好.
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| 关 键 词： | 自适应小波变换 中值滤波 图像压缩 提升格式 |
| 收稿时间： | 2003-04-08 |
An Adaptive Wavelet Transform via Lifting for Image Compression |
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| Institution: | (School of Electronic Engineering and Photoelectric Technology,NUST, Nanjing, Jiangsu 210094) |
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| Abstract: | A method for the construction of adaptive wavelet transforms using median filtering based on lifting scheme is introduced. Adaptive predictors followed by adaptive update algorithm are designed to better approximate signals and create more compact signal representations. In image compression, the experiments show that the proposed method doesn′t match PSNR performance of D9/7 transform, but the visual quality of the method is better. |
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| Keywords: | Adaptive wavelet transform Median filtering Image compression Lifting scheme |
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