| 快速傅里叶变换FFT及其应用 |
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| 引用本文： | 杨丽娟,张白桦,叶旭桢. 快速傅里叶变换FFT及其应用[J]. 光电工程, 2004, 31(Z1): 1-3 |
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| 作者姓名： | 杨丽娟 张白桦 叶旭桢 |
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| 作者单位： | 1. 四川大学,物理科学与技术学院,四川,成都,610064
2. 兰州理工大学,机电学院,甘肃,兰州,730050 |
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| 摘 要： | 利用快速傅里叶变换FFT将图像信号从空间域转换到频域进行分析,使快速卷积、目标识别等许多算法易于实现;然后根据图像信号的灰度结构特征和频谱分布,用Butterworth带通滤波器和二维维纳滤波器进行滤波处理,去除图像信号中的低频干扰和噪声信号;再利用傅里叶反变换将信号还原。结果显示,处理后的模拟远程高空卫星照片轮廓清晰可见。
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| 关 键 词： | 快速傅里叶变换 数字图像处理 卫星照片 目标识别 |
| 文章编号： | 1003-501X(2004)Sup-0001-03 |
| 收稿时间： | 2004-02-18 |
| 修稿时间： | 2004-02-18 |
Fast Fourier transform and its applications |
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| YANG Li-juan,ZHANG Bai-hua,YE Xu-zhen. Fast Fourier transform and its applications[J]. Opto-Electronic Engineering, 2004, 31(Z1): 1-3 |
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| Authors: | YANG Li-juan ZHANG Bai-hua YE Xu-zhen |
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| Affiliation: | YANG Li-juan1,ZHANG Bai-hua2,YE Xu-zhen1 |
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| Abstract: | A lot of algorithms such as fast convolution and targets identification can be easily performed through converting image signal from spatial domain to frequency domain and by means of Fast Fourier Transform (FFT). Filtering processing for eliminating low-frequency disturbance and noise signal is carried out by Butterworth band pass filter and 2-D Wiener filter according to gray scale structural behavior and spectrum distribution of the image signal. The signal can be restored by Fourier inversion. The results show that after processing the photo of the simulated remote high-altitude secondary planet can be seen clearly. |
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| Keywords: | Fast Fourier transforms Digital image processing Satellite photo Target recognition |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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