输入图像尺寸和伸缩因子对二维Morlet子波变换的影响

施伟华; 宋义章; 陈鹤鸣

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输入图像尺寸和伸缩因子对二维Morlet子波变换的影响

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- 输入图像尺寸和伸缩因子对二维Morlet子波变换的影响
- Effect of input image size and elastic factor on 2D Morlet wavelet transform
- 光学精密工程 2003年11卷第5期页码：531-536
- 作者机构：
  
  1. 南京邮电学院, 光信息技术系,江苏南京,210003
  2. 北京信威公司, 深圳研究所,广东深圳,518067
- 作者简介：
- 基金信息：
  
  信息产业部中青年教师科学基金资助项目(No.98部中1)()
- DOI：
  中图分类号： TP391.41
- 收稿日期：2003-04-09，
  
  修回日期：2003-07-25，
  
  网络出版日期：2003-10-15，
  
  纸质出版日期：2003-10-15
- 稿件说明：
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施伟华, 宋义章, 陈鹤鸣. 输入图像尺寸和伸缩因子对二维Morlet子波变换的影响[J]. 光学精密工程, 2003,(5): 531-536

SHI Wei-hua, SONG Yi-zhang, CHEN He-ming. Effect of input image size and elastic factor on 2D Morlet wavelet transform[J]. Editorial Office of Optics and Precision Engineering, 2003,(5): 531-536
施伟华, 宋义章, 陈鹤鸣. 输入图像尺寸和伸缩因子对二维Morlet子波变换的影响[J]. 光学精密工程, 2003,(5): 531-536 DOI：

SHI Wei-hua, SONG Yi-zhang, CHEN He-ming. Effect of input image size and elastic factor on 2D Morlet wavelet transform[J]. Editorial Office of Optics and Precision Engineering, 2003,(5): 531-536 DOI：

摘要

简述了二维光学子波变换理论

用计算机模拟方法研究了伸缩因子对子波变换的影响

发现伸缩因子过大会使变换后的图像的边缘变模糊。得出了合适的伸缩因子值

用计算机模拟和光学实现方法研究了输入图像尺寸对子波变换的影响

实验结果与计算机模拟相一致

认为合适的输入图像尺寸应保证输入图像的频谱范围与子波匹配滤波器的频谱范围相一致

才能使二维Morlet子波变换提取清晰的图像边缘特征。

Abstract

For a given size of 2D Morlet wavelet matched filter

both input image size and elastic factor have significant effect on experimental results. The study of the effect of elastic factor on wavelet transform through computer simulation shows that an excessively large elastic factor blurs the edge of transformed image

and the study of the effect of input image size on wavelet transform through computer simulation and optical means shows that experimental results are in agreement with results of computer simulation

and 2D Morlet wavelet transform can extract clear image edge features only when a suitable input image size is chosen to ensure that the frequency spectrum of input image is in agreement with the frequency spectrum of wavelet matched filter.

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references

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