| 基于小波图像编码中的边界延拓方法分析 |
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| 引用本文： | 邱自华 陈宇拓. 基于小波图像编码中的边界延拓方法分析[J]. 科学技术与工程, 2006, 6(24): 3855-3858 |
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| 作者姓名： | 邱自华 陈宇拓 |
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| 作者单位： | 中南林业科技大学,长沙,410004;中南林业科技大学,长沙,410004 |
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| 摘 要： | 当利用小波对二维图像信号进行变换时，会遇到因为图像信号是有限的问题而必须进行边界延拓。分析了各边界延拓方法的利弊和选择方法。给出将高、低频信号组织在一起进行研究的方法，举出几种不论信号长度为奇数还是偶数．都能在系数不扩充的情况下精确重构的例子。并予以证明。
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| 关 键 词： | 小波变换 边界延拓 图像压缩编码 |
| 文章编号： | 1671-1815(2006)24-3855-04 |
| 收稿时间： | 2006-07-10 |
| 修稿时间： | 2006-07-10 |
Extension Methods for Wavelet Transform Image Coding |
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| QIU Zihu,CHEN Yutuo. Extension Methods for Wavelet Transform Image Coding[J]. Science Technology and Engineering, 2006, 6(24): 3855-3858 |
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| Authors: | QIU Zihu CHEN Yutuo |
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| Abstract: | A problem will occur when DWT(Discrete Wavelet Transform) is applied to image coding due to the finiteness of image sizedata. Deal with the problem by edge extension, the advantage and disadvantage of the methods of extension are described and several proved examples are gaven in which the finite-length sequences can be perfect reconstructed by saving the output whose number is the same as the number of the input. |
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| Keywords: | wavelet transform edge extension image code |
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