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Description: 该gui函数基本上包括图像处理里面的最基本处理，相当于一个小型photoshop。比如读取文件，几何变换中的垂直镜像，平移，旋转，缩放；正交变换的DFT，FFT，DCT，DST，DHT，DWashT；灰度处理中的反色，直方图均衡，全局线性变换，分段线性变换，指数非线性变换，对数非线性变换；图像增强里面的加噪声，平滑，锐化，伪彩色增强；图像分割里面的灰度阈值法，Robert，Laplace，sobel，prewitt，canny算子边缘检测法；图像恢复里面的直接逆滤波，维纳滤波；图像编码里面的霍夫曼编码，行程编码-Basically, the gui functions including the most basic image processing inside the handle, which is equivalent to a small photoshop. For example, read the document, the geometric transformation of the vertical mirroring, shifting, rotating, zooming orthogonal transformation of the DFT, FFT, DCT, DST, DHT, DWashT anti-gray color processing, histogram equalization, global linear transformation , piecewise linear transformation, index of non-linear transform of the number of non-linear transformation image enhancement which increases the noise, smoothing, sharpening, pseudo-color enhancement the gray-scale image segmentation inside the threshold, Robert, Laplace, sobel, prewitt, canny edge detection operator method image restoration inside direct inverse filtering, Wiener filtering image coding inside the Huffman code, and so on Run-Length Coding
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Size: 398336 |
Author: guhuxiang |
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Description: Grtzl算法计算dft的matlab程序和lms算法的自适应窄带滤波的程序。-Dft algorithm Grtzl the lms algorithm matlab procedures and narrow-band adaptive filtering process.
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Size: 1024 |
Author: lmy |
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Description: 本程序为一个用matlab实现的语音滤波程序，能计算并显示语音信号的幅频特性，巴特沃斯低通滤波器幅度和相位响应，引入噪声后的幅频特性，以及滤波后的DFT幅频特性。本程序附有语音文件以供试验。-This program is an implementation using matlab voice filtering procedures, can calculate and display the speech signal amplitude-frequency characteristics of Butterworth low-pass filter magnitude and phase response, after the introduction of noise, amplitude-frequency characteristics, as well as the filtered DFT amplitude-frequency characteristics. This procedure for testing with voice file.
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Size: 4096 |
Author: 周峰 |
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Description: Presently FFT usage in GPS receivers has been a
topic of extensive study and many improved FFT-based
acquisition methods with averaging correlation
technique also have emerged. Although averaging
arithmetic can reduce the instant processing points of
FFT/IFFT, their noise performance is not promising. In
this paper a novel compress-sampling algorithm for
FFT-base GPS signal acquisition method is proposed.
It not only diminishes the size of FFT/IFFT core but
also enhances the noise immunity of receiver with its
“redundancy” structure. Simulation results of Matlab
testify that the computational complexity of the novel
algorithm has been efficiently suppressed to only
0.93 over the 2D search method in time domain. At
the same time the lower amplitude threshold obtained
from the novel method gets a lower false alarm
probability comparing with the direct DFT algorithm
with no compression. The noise immunity is enhanced-Presently FFT usage in GPS receivers has been a
topic of extensive study and many improved FFT-based
acquisition methods with averaging correlation
technique also have emerged. Although averaging
arithmetic can reduce the instant processing points of
FFT/IFFT, their noise performance is not promising. In
this paper a novel compress-sampling algorithm for
FFT-base GPS signal acquisition method is proposed.
It not only diminishes the size of FFT/IFFT core but
also enhances the noise immunity of receiver with its
“redundancy” structure. Simulation results of Matlab
testify that the computational complexity of the novel
algorithm has been efficiently suppressed to only
0.93 over the 2D search method in time domain. At
the same time the lower amplitude threshold obtained
from the novel method gets a lower false alarm
probability comparing with the direct DFT algorithm
with no compression. The noise immunity is enhanced
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Size: 254976 |
Author: zohreh |
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Description: 1.加深对离散时间信号的DTFT基本概念的理解。
2.熟悉DFT变换原理及其基本性质。加深对DTFT和DFT相互关系的理解
3.熟悉FFT算法原理和FFT子程序的应用
4.掌握用MATLAB计算离散时间信号的DTFT和DFT的方法，FFT函数的用法。
-1、Deepen their understanding of discrete-time signal DTFT understanding of basic concepts.
2、DFT-familiar with the principle and its basic properties. DTFT and DFT deepen the understanding of the relationship between
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Size: 1024 |
Author: 刘蓉 |
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Description: matlab 用DFT实现长序列卷积并用FFT进行信号谱分析-matlab convolution with the DFT and used to achieve a long sequence of FFT for signal spectral analysis
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Size: 1024 |
Author: 刘彦龙 |
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Description: DFT算法仿真，采用matlab环境，非常实用，欢迎下载！-DFT algorithm simulation using matlab environment, very practical, welcome to download!
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Size: 3072 |
Author: 张明 |
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Description: 离散信号,用DFT（通过FFT计算）方法分析其频谱，采用矩形窗，对不同的采样点数进行分析-Discrete signal, using DFT (via FFT calculation) method, analyze its spectrum, using rectangular windows of different sampling points for analysis
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Size: 13312 |
Author: 张晓风 |
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Description: 利用蝶形算法，实现快速傅立叶变换及其逆变换-The use of butterfly algorithm, fast Fourier transform and its inverse transform
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Size: 1024 |
Author: 韩静 |
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Description: DFT滤波器组，画出了DFT分析滤波器组的图形，比较了余弦调制滤波器组(CMFB)和DFT滤波器组的性能-DFT filterbanks （analysis filterbanks）compare CMFB with DFT filterbanks
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Size: 3072 |
Author: wangyu |
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Description: The matlab codes for adaptive filtration and echo-cancelleration, codes using LMS, RLS, DFT, Subband filtration.
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Size: 61440 |
Author: anton |
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Description: 对图像进行傅里叶变换，观察其幅度谱和相位谱-Fourier transform of the image to observe its amplitude spectrum and phase spectrum
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Size: 2048 |
Author: huihui |
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Description: 讲解了FFT DFT 以及有关的matlab函数，比较实用-Explained the FFT DFT and the matlab function, more practical
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Size: 655360 |
Author: vincent |
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Description: 自己编写的基为2的fft程序，输入为时间序列，输出为DFT序列-matlab code that can perform FFT based on radix-2 algorithm
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Size: 1024 |
Author: lipaialice |
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Description: 利用傅立叶反变换自动生成随机分形面，可生成各向同性或各向异性的。-Generating the 2D fractal surfaces using inverse DFT method
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Size: 1024 |
Author: 毕丽思 |
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Description: 利用DFT和IDFT计算x(n)和y(n) 的10点、15点、20点圆周卷积，然后与线形卷积结果画图比较-Calculated using DFT and IDFT x (n), and y (n) 10 points, 15 points, 20 points cyclic convolution, and then drawing comparison with the linear convolution result
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Size: 1024 |
Author: 田友凡 |
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Description: 用matlab对一张图片进行DFT变换，DCT变换,比较保留20个DCT变换系数重构的图象与原始图像的差别.-Using matlab on a picture to DFT transform, DCT transform, compared to 20 DCT transform coefficients to retain the image reconstruction of the difference between the original image.
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Size: 455680 |
Author: tosh |
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Description: 信号分析处理的源程序，包括傅里叶变换、DFT、FFT、等的例程地对地导弹的-Signal analysis and processing of the source, including Fourier transform, DFT, FFT, and other routine ground-
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Size: 208896 |
Author: 潘超 |
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Description: 信号分析处理的源程序，包括傅里叶变换、DFT、FFT、等的例程地对地导弹的-Signal analysis and processing of the source, including Fourier transform, DFT, FFT, and other routine ground-
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Size: 2048 |
Author: 潘超 |
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Description: 几种增强算法的总结，MATLAB代码，算法包括有：谱减法，MMSE-LOGSTSA ,MMSE-ST-DFT ,decision-Directed method,multi-band 谱减法等-A summary of several enhancement algorithm, MATLAB code, the algorithm include: spectral subtraction, MMSE-LOGSTSA, MMSE-ST-DFT, decision-Directed method, multi-band spectral subtraction, etc.
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Size: 24576 |
Author: tangxianfeng |
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