搜索资源列表
-
1下载:
数字图像在产生过程中经常会受到噪音污染。因此,对于数字图像应该对其进行去噪音处理。在传统的基于傅里叶变换的信号去噪音方法中,可以使得信号和噪音的频带重叠部分尽可能的小,这样就可以在频域通过时,不需改变滤波方法而将信号和噪音分隔开来。但是,如果信号和噪音的频域重合时,用该方法进行噪音处理的效果就比较差。-digital image in the selection process will be subject to regular noise pollution. Therefore, the
-
-
0下载:
录制自己的一段语音,时间控制在15秒到30秒左右;利用wavread函数对自己的语音进行采样,记住采样频率。
(1)画出原始语音信号的时域波形,而后以1秒为间隔,求出每秒数据的功率谱。
(2)根据语音信号特点,分别设计FIR及IIR滤波器,分别画出滤波器幅频和相频特性曲线。用设计的滤波器对信号滤波,画出滤波后时域波形。用sound函数回放语音信号。
(3)求出特征频段语音信号随时间变化的曲线(每间隔0.05秒求一次功率谱)。
-Record your own voice for
-
-
1下载:
利用matlab实现图像的频域滤波,包括巴特沃斯低通、理想低通、高斯低通等-Using matlab for image filtering in frequency domain, including the Butterworth low-pass, ideal low-pass, Gaussian low-pass, etc.
-
-
2下载:
matlab下实现降噪,功率谱计算。%程序中设定采样点数为256个,采样频率为10000hz,
%输入信号为随机噪声和两个正弦的合成信号
%设定的滤波器的截止频率为3500hz
%通过挈比雪肤滤波器,运行程序,比较滤波前后的频域波形
%滤波去除了高频信号-matlab achieve noise reduction, power spectrum calculation. Sampling procedure set for 256 points, the sampling f
-
-
3下载:
% y=filter(sig,fmin,fmax)
% 对信号进行理想滤波,可完成低通,带通
% sig为被滤波信号
% fmin为下限频率,当fmin为0时为低通滤波器,当fmin>0时,为带通滤波器
% fmax为上限频率,fmax>fmin
% fs为信号的采样频率
% y为经过滤波后的信号
-% Y = filter (sig, fmin, fmax)% of the ideal signal filtering, to be com
-
-
0下载:
这是本人夏季学期的课程设计:模拟信号数字化滤波处理的计算仿真-Chebyshev I型低通滤波,对模拟信号进行数字化滤波处理。根据数字滤波器的性能指标,计算出Chebyshev1型低通IIR数字滤波器的系统函数,画出数字滤波器的频率响应曲线,给出Chebyshev1型低通IIR数字滤波器的设计结果。-This is my summer semester of the curriculum design: analog signal processing digital simulation f
-
-
0下载:
Title : Implementation of quadrature modulation and demodulation
Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequenc
-
-
1下载:
介绍了一种荃于MATLAB数字信号处理工具箱、MATLAB数据分析和MATLAB圈形对
象的时变数字信号瞬时频率枯计方法。这种方法利用时频分析结果来估计信号的麟时频率,其
中涉及时频分析、滤波、曲线拟合辞多种处理过程。处理过程的编程实现封较于用户界面上作
为文互工具的控件中,由用户通过交互界面逐步完成估计瞬时预率的工作.-Tsuen introduced a digital signal processing in the MATLAB toolbox, MATLAB and MAT
-
-
0下载:
求生物信号的滤波和归一化程序,是低频信号的在bp中应用的一部分。-Seeking biological signal filtering and normalization procedures, low-frequency signals in the bp part of the application.
-
-
1下载:
利用自适应陷波器来消除通信系统中的工频干扰。重点从LMS算法的步长因子、信号与干扰的频率差、参考输入的幅值和相位等几个方面讨论单频陷波器的滤波效果。另外,还以双频为例,讨论了多频级联型陷波器的特性,证实了经过两次滤波后,信号可被真实的恢复出来,且误差收敛趋于稳定。-The use of adaptive notch filter to eliminate the communication system frequency interference. LMS algorithms focus f
-
-
0下载:
内包含频域滤波的步骤及MATLAB代码,是频域增强中所必须知道的哦,还有一个用巴特沃思滤波器效果的例子。-Contains the frequency domain filtering steps and MATLAB code, is enhanced in the frequency domain needs to know Oh, and a Butterworth filter with the effect of example.
-
-
0下载:
The File Contains 5 Other Source Codes include, bandpass Butterworth Filter, Gabor Bank, RGB to HLS Conversion, Image Filtering in Frequency Domain and Hough transform.
I hope that s enough to make me a member.
Regards.
Zizi.
-
-
0下载:
A speech signal filterbank, using melscale frequency and framebanking.- 1. For speech signal can be represented as a discrete sequence of frames (or feature vectors) that can be used as the input to a speech recogniser. Important ideas and technique
-
-
1下载:
本例主要说明了空间域滤波与频域滤波的比较!在空间域中采用了Sobel掩膜对f滤波的结果与在频域中进行等价操作的结果!-This example illustrates the spatial filtering mainly with the comparison of frequency domain filtering! In the spatial domain using the Sobel filter mask on the results of f in the frequency
-
-
0下载:
filtering and restoration in frequency domain
-
-
0下载:
压缩包里面有四个程序:在matlab中对图像进行过滤操作和频率操作,和函数的变换-Compressed inside four programs: the transformation of image filtering operation and the frequency of operation, and function in matlab
-
-
0下载:
All images and pictures contain spatial frequencies. Most of us are familiar with some type of frequency such as the 60-cycle, 110-volt electricity in our homes. The voltage varies in time as a sinusoid, and the sinusoid completes a full cycle 60 tim
-
-
0下载:
匹配追踪和正交匹配追踪,GSM中GMSK调制信号的产生,主要为数据分析和统计,最大似然(ML)准则和最大后验概率(MAP)准则,用MATLAB实现的压缩传感,FMCW调频连续波雷达的测距测角,对信号进行频谱分析及滤波,在MATLAB中求图像纹理特征。- Matching Pursuit and orthogonal matching pursuit, GSM is GMSK modulation signal generation, Mainly for data analysis and st
-
-
0下载:
该文件详细介绍了在频域中滤波的集中方法,以及每种方法的滤波曲线,可以分析不同的效果(The file describes the centralized method of filtering in the frequency domain, and the filtering curves of each method, which can be used to analyze different effects.)
-
-
0下载:
The reason for doing the filtering in the frequency domain is generally because it is computationally faster to perform two 2D Fourier transforms and a filter multiply than to perform a convolution in the image (spatial) domain. This is particularly
-