Description: 编写一个程序计算并显示一幅二维图象的Fourier变换（幅度和相位谱）及其逆变换，要求用FFT实现-procedures for the preparation of a calculation and display a two-dimensional image of the Fourier transform (amplitude and phase spectrum) and its inverse transform, called for using the FFT Platform: |
Size: 399290 |
Author:祖超 |
Hits:
Description: 编写一个程序计算并显示一幅二维图象的Fourier变换（幅度和相位谱）及其逆变换，要求用FFT实现-procedures for the preparation of a calculation and display a two-dimensional image of the Fourier transform (amplitude and phase spectrum) and its inverse transform, called for using the FFT Platform: |
Size: 746496 |
Author:祖超 |
Hits:
Description: 实验内容：
1．求下列3个模板的频率响应，并显示其三维图形；选择一幅图
像，利用这3个模板分别对该图像进行卷积运算，将卷积运算
获得的图像与原始图像进行比较，说明各模板的类型以及模板
（b）、（c）的区别与联系。
2. 选择一幅图像，对其进行离散Fourier变换，仅利用其相位谱重构原图像，然后仅利用其振幅谱重构原图像，比较实验结果；
选择两幅不同类型的图像，分别进行Fourier变换，交换二者的相位谱后求Fourier反变换，比较实验结果，说明图像Fourier相位谱的重要性。-Experimental contents: 1. Template for the following three frequency response and to show its three-dimensional graphics select an image using the three templates, respectively, of the image convolution operation, the convolution operation to obtain the images were compared with the original image to illustrate the template the type of template (b), (c) the difference with the contact. 2. Select an image, its discrete Fourier transform, only to use its phase spectrum remodeling the original image, and then only the use of its amplitude spectrum reconstruction of the original image to compare experimental results choice of two different types of images, respectively Fourier Transform, the exchange between the two after the phase spectrum for Fourier Transform, compare experimental results to illustrate the image of the importance of Fourier phase spectrum. Platform: |
Size: 1024 |
Author:syq |
Hits:
Description: （1）求出两维单色数字图象的傅立叶变换以及逆变换，除对比图象效果外，还要给出以中心点作为原点图象显示方式的傅立叶变换的频谱、相位谱，并验证两维傅立叶变换的性质。
（2）傅立叶变换后，计算图象能量谱的分布范围：画出包含图象能量92.0％，94.6％, 96.4, 98.0％ 以及99.5％ 的圆圈区域。-(1) obtained two-dimensional monochrome digital image of the Fourier transform and inverse transform, with the exception of the effect of contrast images, but also given to the center as the origin of the image displayed Fourier transform spectrum, phase spectrum, and verify that two-dimensional Fourier transform nature. (2) Fourier Transform, the calculation of the distribution of image energy spectrum range: Draw contains images of energy 92.0, 94.6, 96.4, 98.0 and 99.5 of the circle region. Platform: |
Size: 2015232 |
Author:杨怡 |
Hits:
Description: 题目：离散富立叶变换（DFT）和频谱分析.matlab实现 1信号函数h(t)= e-a*t*tsin(2πft)2编程计算的离散富立叶变换（DFT）和IDFT图像。3计算振幅谱，相位谱以及检测信号主频-Title: Discrete Fourier Transform (DFT) and spectral analysis. Matlab function to achieve a signal h (t) = ea* t* tsin (2πft) 2 programming computing discrete Fourier transform (DFT) and IDFT image. 3 Calculation of the amplitude spectrum, phase spectrum, as well as detection of signal frequency Platform: |
Size: 100352 |
Author:chissie |
Hits:
Description: 小学期的源程序
1．试编MATLAB程序。信号 sinc(10*t),-2<=t<=2
m(t)=
0,其它
用100hz的载波来产DSB信号并解调。完成下列工作：
画出已调信号；
求已调信号的频谱，并用图像表示。
画出解调信号；
求解调信号的频谱，并用图像表示。
2．信号
sinc2(100t),|t|≤t0
m(t)=
0, 其它
采用频率调制调制为1000HZ的载波。频偏常数为kf=50,t0=0.2。
注：（求和代替积分）
3．信号
2, t0/3>t>0
m(t)= -6, t0/3<=t<2*t0/3
0, 其它
t0=0.15,使用AM调制和包络检波解调.-Primary phase of source 1. Test procedures for MATLAB. Signal sinc (10* t),-2 < = t < = 2 m (t) = 0, the other with the 100hz signal carrier to the middle class and DSB demodulation. To complete the following tasks: Draw has been transferred signal for the spectrum signals have been adjusted, and image representation. Draw demodulation signal solving transfer spectrum signal, and image representation. 2. Signal sinc2 (100t), | t | ≤ t0 m (t) = 0, the other the use of frequency modulation of the carrier modulation for 1000HZ. Offset constant kf = 50, t0 = 0.2. Note: (sum in lieu of points) 3. Signal 2, t0/3> t> 0 m (t) =-6, t0/3 < = t < 2* t0/3 0, other t0 = 0.15, the use of AM modulation and demodulation envelope detector. Platform: |
Size: 3072 |
Author:张静 |
Hits:
Description: 对IQ接收器最重要的两个参数,即I和Q两路分量之间的幅度一致性和相位正交性,可采
用如下办法计算:把I、Q 两路信号分别作FFT ,找出频域内信号的幅度,即可算得两路分量的幅度一
致性 把I、Q两路信号合成一个复数信号,作FFT ,对得到的频谱求镜像抑制比(即频域内的信号与信号镜像的幅度比) ,通过镜像抑制比和幅度一致性,可求出接收机的I和Q两路分量之间的相位正交性。-IQ receiver for the two most important parameters, namely I and Q components of two-way consistency between the amplitude and phase orthogonality may be adopted calculated using the following method: to I, Q 2 signals, respectively for FFT, to find a frequency domain signal amplitude, can be considered as two-way component caused by the range of 1 the I, Q 2 signals into one complex signal for FFT, the spectrum demand of the received image rejection ratio (ie, frequency domain signal and magnitude of the signal mirror ratio), through the image rejection ratio and extent of consistency, the receiver can be derived I and Q phase between the two-way component orthogonality. Platform: |
Size: 1024 |
Author:chinaafxp |
Hits:
Description: matlab 数字图像信号的频域分析及仿真
将二维数字图像进行傅立叶频域分析，并且做了图像幅度谱重建和相位谱重建，通过这个例子大家可以明白相位比振幅更重要。-matlab digital image signals in frequency domain analysis and simulation of two-dimensional digital image Fourier frequency domain analysis, and has done a reconstruction of the image amplitude spectrum and phase spectrum reconstruction, by this example we can understand the phase is more important than the amplitude. Platform: |
Size: 791552 |
Author: 自由色彩 |
Hits:
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 Platform: |
Size: 2048 |
Author:huihui |
Hits:
Description: 图像的傅里叶变换。在代码中实现了将两幅图像的幅度谱和相位谱进行交换，进而理解两者在图像显示中的作用-Fourier transform of the image. Implemented in the code will be two images amplitude spectrum and phase spectrum of exchange, and thus to understand both the role of the image display Platform: |
Size: 1987584 |
Author:sunxiaowen |
Hits:
Description: 交换两幅图像的相位谱，利用频域滤波消除周期噪声！-Exchange of two images of the phase spectrum, using frequency domain filtering periodic noise elimination!
Platform: |
Size: 93184 |
Author:王岚 |
Hits:
Description: 使用MATLAB对特定信号进行频谱分析，画出幅度和相位谱的图像，并包含卷积运算和验证程序-Using MATLAB on a specific signal spectrum analysis, to draw the image amplitude and phase spectrum, and includes convolution and verification procedures Platform: |
Size: 1024 |
Author:Owen |
Hits:
Description: 对两幅图像作FFT变换，然后交换两幅图像的幅度谱和相位谱，然后通过逆fft变换还原图像，得到原图和变换后图像的对比，得出图像的幅度谱和相位谱哪个更重要的结果，注意图形是8位灰度图，尺寸大小必须一样-Exchange of the two images of the amplitude spectrum and phase spectrum and inverse FFT transform to restore Platform: |
Size: 52224 |
Author:陈述 |
Hits:
Description: 图像处理中的双普重构，通过此程序欲行结果将看出在图像重构中幅度谱与相位谱谁的贡献更大-Dual Pu reconstruction in image processing through this program, like the line will be seen in the image reconstruction amplitude spectrum and phase spectrum who contribute more Platform: |
Size: 921600 |
Author:july |
Hits:
Description: 根据两幅不同图像的幅度谱和相位谱重构出一幅新的图像，验证相位信心的重要性-According to two different images of the amplitude spectrum and phase spectrum reconstruct a new image, the importance of validation phase faith Platform: |
Size: 244736 |
Author:李建 |
Hits:
Description: 基于菲涅尔域的双随机相位编码图像加密方案，利用角谱传播法实现-Based on double random phase encoding Fresnel domain image encryption scheme to achieve the use of angular spectrum propagation method Platform: |
Size: 258048 |
Author:海明 |
Hits:
Description: matlab下图像处理中幅度谱相位谱以及图像重构的例子。-An example of amplitude spectrum phase spectrum and image reconstruction in image processing under matlab. Platform: |
Size: 1024 |
Author:陈远 |
Hits:
Search - spectrum phase image