In the end, this dissertation analyzes and compares the ground clutter suppression performance of the time and frequency domain filtering.
最后，本文对地物杂波时域与频域的抑制性能进行了分析与比较。
The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).
介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。
Low level image processing is the base of localization. The paper discusses time domain filtering and frequency domain filtering according to the noise disturbance in the surrounding images.
低层视觉图象处理是视觉定位的基础，针对环境图象存在噪声干扰的特点，文章分别从时域和频域上分析了图象滤波的方法。
Although the filtering method in frequency domain can solve the time variant filtering problem based on Fourier transform, the method may appear a false anomaly in conjunct part between Windows.
频率域滤波方法虽然可解决时变滤波问题，但这种方法是基于傅里叶变换，在窗口与窗口之间的接合部位会出现假异常。
Based on single magnetic dipole model, the spatial filtering method of cardiac magnetic signal in the frequency domain was investigated.
本文利用心脏磁场单磁偶极子模型研究了心脏磁场强度检测信号的频域空间滤波法。
Filtering signal in the wavelet domain, by the frequency components acceptable for ear from the original speech, is a simple and effective speech denoising method.
利用此特性对信号进行小波域滤波，可从加噪的语音中提取人耳所能接受的频率成份，是一种简单有效的语音去噪算法。
In this paper, multilevel water gathering basins are separated and extracted automatically with filtering from geographic map based upon their differences in frequency domain.
利用多级汇水盆地在频率域(或波数域)中的频率差异，通过滤波方法逐级分离，并提取它们。
We first employed the unsharp masking to adjust the contrast of angiograms, and then removed the consistent component of low frequency in frequency domain by high-pass filtering.
首先采用反锐化滤波器对血管造影图像进行对比度调整，然后通过频域高通滤波去除背景中的一致性成分。
We give the basic theory of frequency filtering. In the frequency domain, the work focuses on the adaptive Gaussian frequency filter.
给出了频域滤波的基本原理，重点研究了自适应高斯频域滤波器这一频域滤波算法。
Homomorphic filtering is a frequency domain operation to compress image light area and enhance contrast.
同态滤波是一种将亮度范围压缩和对比度增强的频域处理方法。
The filtering in spatial domain, spatial frequency domain and a system of optical formatting imagines are also analyzed.
同时也分析了空域滤波、空频域滤波、光学成像系统。
We discuss the nonperiodic abnormal stripe noise due to the spaceborne SAR system itself, and present an area filtering method in two-dimensional frequency domain.
对于因雷达系统本身原因而产生的一些非周期不规则条纹噪声进行讨论，针对此类噪声提出一种二维频域区域滤波的算法。
The characteristic of this method is that the optimum filtering parameters can be determined only in the frequency domain, so the computation time is decreased.
该方法的特点是，只需在频域就能确定滤波参数，因而节省了大量计算时间。
The equalization in frequency domain is the feed-forward filtering of the DFE. And the traditional transversal filter is used in the feed-back filtering in time domain.
本文设计的均衡器采用了时域和频域联合处理的自适应均衡技术，其中频域均衡作为DFE的前馈滤波部分，时域的反馈滤波的部分使用常规的横向滤波器。
The way, based on the principle of inverse filtering for recovering the ideal signals, can be realized both in time domain and in frequency domain.
基于恢复理想信号频谱的逆滤波原理，利用通道均衡法对接收通道的失配进行了校正。 通道均衡可在时域或频域实现。
According to the principles and signal properties of flutter test, a new filtering algorithm in time-frequency domain is presented.
根据颤振试验的原理和观测信号特点，提出一种时频域滤波方法。
After the characteristics of 2-d frequency domain of SAR images are analyzed, a method named normalized standard deviation filtering is proposed.
通过分析SAR图像的频谱特点，提出一种归一化标准偏差滤波方法。
After the characteristics of 2-d frequency domain of SAR images are analyzed, a method named normalized standard deviation filtering is proposed.
通过分析SAR图像的频谱特点，提出一种归一化标准偏差滤波方法。
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