Description: （1）用MATLAB开发的傅立叶变换以及逆变换的一个例子，测试通过无误。（2）C＋＋编写的傅立叶以及逆傅立叶变换程序源代码，测试通过。-(1) Using MATLAB development of the Fourier transform and inverse transform an example of the test correct. (2) C++ and inverse Fourier Fourier transform source code, test. Platform: |
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Author:孙中雨 |
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Description: 鲁棒控制器设计，由于RBF网络可以实现任意逼近的非线性关系，它的目标是要做到误差平方和最小，与非线性PCA的目标一致，所以上述非线性PCA的模型可以通过采用两个RBF网络来实现非线性正变换 和反变换 。RBF网络是一个三层前馈网络，隐层采用径向基函数作为激励函数。第一个RBF网络把高维空间的数据映射到低维空间（如图4），第二个RBF网络将前面网络输出的低维空间数据再映射到高维空间，实现数据恢复(如图5)。这两个网络分别进行训练。-robust controller design, as RBF networks can achieve arbitrary nonlinear approximation, Its goal is to achieve the minimum squared error, and nonlinear PCA have the same goal So these nonlinear PCA model may be adopted by two RBF networks to achieve nonlinear transformation and inverse transform. RBF network is a feed-forward network, hidden layer RBF function as an incentive. RBF a network of high-dimensional data mapping space to the low-dimensional space (figure 4), second RBF network will be in front of the output of low-dimensional space mapping data again to a high-dimensional space. data Recovery (figure 5). The two networks separately for training. Platform: |
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Author:浇洒距离 |
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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: |
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Author:祖超 |
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Description: 整数阶离散汉克尔(hankel)正变换与反变换
快速汉克尔（hankel)正变换与反变换
discrete Hankel transform of integer
order n
fast Hankel transform of order n
-Discrete integer-order Hankel (hankel) transformation and anti-fast Hankel transform (hankel) is transform and inverse transform discrete Hankel transform of integer order nfast Hankel transform of order n Platform: |
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Author:stone |
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Description: s变换，是当前比较流行的时频分析算法，可以用于地震数据时频分析和频谱分析，该程序基于matlab平台，实现了s变换和反变换。-s transformation, is the more popular time-frequency analysis algorithms, can be used for seismic data analysis and time-frequency spectrum analysis, the program based on matlab platform realize the s transform and inverse transform. Platform: |
Size: 648192 |
Author:刘小龙 |
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Description: 确定有理z变换的因式分解形式，并确定零极点,根据零极点确定有理z变换的表达式,部分分式展开的方法求逆z变换,用长除法求逆z变换,完成系统的稳定性判断-Z transformation to determine justified factorization form, and to determine zero-pole, according to zero-pole z transformation to determine justified the expression, partial fraction methods to start z inverse transform, using long division inverse z transform, the completion of system stability judge Platform: |
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Author:zhl |
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Description: 根据Arnold置乱变换算法的过程和8位图像像素值的取值范围（0≤f(x, y)≤255），导出了一种逆变换算法。该算法假设了两个变量p和q，由Arnold正变换算法导出了四个方程组，然后再根据像素值的取值范围，计算出p和q的可能取值，针对p和q的取值组合，计算出各方程组的解，那么在所有方程组解中满足像素值取值范围的即为逆置乱的解。经分析，逆变换算法的解忧且仅有一个。-According to Arnold scrambling algorithm process and 8-bit image pixel value range (0 ? f (x, y) ? 255), derived a kind of inverse transform algorithm. The algorithm is assumed that two variables p and q, by Arnold transform algorithm is derived for the four equations, and then in accordance with the range of pixel values to calculate p and q possible values for p and q values combination of the equations to calculate the solution, then all equations in the solution to meet the pixel value range of which is the solution of inverse scrambling. After analysis, inverse transform algorithm and only one of the worries. Platform: |
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Author:nubga |
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Description: 用MATLAB程序实现gabor变换，调试过，可以用。-MATLAB program using gabor transform, debugging, and can be used. Platform: |
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Author:yuzhun21 |
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Description: Le Gall 5/3 小波变换及其反变换，可用于JPEG2000无损压缩中-Le Gall 5/3 wavelet transform and its inverse transform，which can be used for lossless compression in JPEG2000 Platform: |
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Author:zxb |
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Description: 执行一维和二维小波变换在MATLAB环境中。十几包括的小波函数有：
* Haar
* Daubechies 1-6
* Symlets 1-6
* Coiflets 1 and 2
* Splines and reverse splines
* CDF 9/7 and Le Gall 5/3
* S+P wavelets (2,2), (4,2), (4,4), (6,2), and (2+2,2)
* Two Ten "TT"
* Low-complexity design
* HVS design Visual 9/3
-Description Perform 1D and 2D wavelet transforms in MATLAB. WAVELET(W,L,X) computes the L-stage discrete wavelet transform (DWT) of signal X using wavelet W. For the inverse transform, WAVELET(W,-L,X) inverts L stages. Included wavelets are
* Haar
* Daubechies 1-6
* Symlets 1-6
* Coiflets 1 and 2
* Splines and reverse splines
* CDF 9/7 and Le Gall 5/3
* S+P wavelets (2,2), (4,2), (4,4), (6,2), and (2+2,2)
* Two Ten "TT"
* Low-complexity design
* HVS design Visual 9/3 Platform: |
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Author:chen huayi |
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Description: 双正交小波的正变换和反变换，以及显示程序；提升小波的正变换和反变换，以及显示程序-Are the biorthogonal wavelet transform and inverse transform, and display procedures the lifting wavelet transform and inverse transform is, as well as the display program Platform: |
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Author:zoe |
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Description: The function implement the 1D sequency(Walsh) ordered fast Walsh-Hadamard transform which can be used in signal processing, pattern recongnition and Genetic alogorithms.
This algorithm uses a Cooley-Tukey type signal flow graph and is implemented in N log2 N additions and subtractions. Data sequence length must be an integer power of 2.
The inverse transform is the same as the forward transform except for the multiplication factor N. This can be easily achieved by deleting the last line i.e. x=inv(N)*x
Example:
x=[1 2 1 1]
W=FWHT(x) -The function implement the 1D sequency(Walsh) ordered fast Walsh-Hadamard transform which can be used in signal processing, pattern recongnition and Genetic alogorithms.
This algorithm uses a Cooley-Tukey type signal flow graph and is implemented in N log2 N additions and subtractions. Data sequence length must be an integer power of 2.
The inverse transform is the same as the forward transform except for the multiplication factor N. This can be easily achieved by deleting the last line i.e. x=inv(N)*x
Example:
x=[1 2 1 1]
W=FWHT(x) Platform: |
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Author:ry |
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Description: Computing the wavelet transform of an image
First we load the image
Then we set up the parameter of the transform
At last we actually perform the transform
If we do the inverse transform, we get back nearly the original image
Finaly we display the image and its transform Platform: |
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Author:Swati |
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Description: 二次函数、反比例函数绘图.可以自由变换所画的函数-Quadratic function, mapping function inverse proportion. Are free to transform the function of painting Platform: |
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Author:zjq |
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Description: 工程名为DctQuant，编程实现了一帧CIF格式4:2:0的YUV图像的H.264的整数变换、量化以及逆量化、逆变换。具体的功能表述如下：
1、首先按“打开YUV”按钮，选择一帧格式为CIF的4:2:0的YUV图像（默认的YUV图像的格式为4:2:0的CIF格式）。选择完成后，可以看到显示的输入图像。
2、输入QP值，QP是0到51之间的整数值，超出范围，会弹出对话框提示。QP默认为28。注意：当改变QP值为0时，即没有量化，则点击转换按钮显示出的PSNR值即为输入图像的PSNR值。
3、点击转换按钮，可以看到经过变换量化和逆量化逆变换过程以后输出的图像以及显示输出图像的PSNR值（保留小数点后6位）和默认4x4块号为0的原始各像素值、整数变换后的值、量化后、逆量化后、逆变换后的值。
4、可以手动改变块号，块号的范围为0-6335，超出范围会弹出对话框提示。然后单击“输入块号”按钮即可显示此块号对应的原始各像素值、整数变换后的值、量化后、逆量化后、逆变换后的值。
-Works entitled DctQuant, programming of a CIF format, 4:2:0 YUV images H.264 integer transform, quantization, and inverse quantization, inverse transform. Expression of specific functions are as follows:
1, first press the "Open YUV" button, select a format for the CIF of the 4:2:0 YUV image (the default YUV image format 4:2:0 CIF format). Selection is complete, you can see displayed in the input image.
2, enter the QP value, QP is an integer between 0-51 values out of range, will pop-up dialog box prompt. QP default is 28. Note: When changing the QP value is 0, that is not quantified, then click the convert button to show the PSNR values of the PSNR values shall be the input image.
3, click the Convert button, you can see through the transformation inverse quantization and inverse quantization output of the image after the transformation process and display the output image PSNR values (retention decimal 6), and the default 4x4 block No. 0 of the original values of each pixel , int Platform: |
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Author:王婉君 |
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Description: 用双谱和小波变换去除信号中加性高斯噪声的相关程序
1.实现单个变量的双谱分析程序
2.用傅立叶反变换求自相关函数的程序
3.用fft求取喜好频谱、功率谱、均方根谱、对数谱的程序
4.读取.wav语音信号后用小波去加信白噪声的程序
5.用各种小波和阀值对同一信号去加性噪声效果比较的程序
-Double-spectral and wavelet transform to remove the signal plus Gaussian noise procedures 1. To achieve a single variable pairs of spectral analysis procedures 2. Using Fourier inverse transform procedures for seeking self-correlation function 3. To strike a preference to use fft spectrum , power spectrum, RMS spectrum, several spectra of the procedure 4. read. wav audio signal with wavelet plus a letter to the white noise process 5. with a variety of wavelet and threshold on the same signal to additive noise Comparison program Platform: |
Size: 5120 |
Author:沈玉杰 |
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Description: 傅里叶变换及傅里叶逆变换的c++实现，令附有测试数据和实验结果。-Fourier transform and its inverse transform of the c++ implementation, so that with test data and experimental results. Platform: |
Size: 9216 |
Author:张敏 |
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