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Description: 该程序实现了对一幅图象进行Walsh变换。首先定义了一个imagewnd类, 该类可用于位图的创建、显示；WALh函数为快速沃尔什-哈达玛变换，f为时域值,F为变换域值,power为2的幂数，Walsh1函数为二维变换；在该函数中取出了一幅位图的所有像素，用来进行变换.具体算法过于专业，我就不细说了。-the realization of an image Walsh transform. First imagewnd definition of a category, such can be used for the bitmap is created, displayed; WALh function for the rapid Walsh-Hadamard transform, too-valued f, F value of the transform domain, power and the power to two the number Walsh1 function of two-dimensional transform; function in the removal of a bitmap of all pixels, used for transformation. specific algorithm is too professional, I will not elaborate on this.
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Author: none |
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Size: 102400 |
Author: 站长 |
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Description: walsh码的生成程序,小m序列的生成程序,以及求序列之间周期和非周期相关函数-code generation process, small m sequence generation process and seek sequence between cycles and cycle-related function
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Author: 杨元 |
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Description: 1.图像频域处理正交变换的matlab实例
2.含有的频域变换内容如下：
正交变换通用算子
傅立叶变换
傅立叶变换的原理
傅立叶性质
二维离散傅立叶变换（ 2DDFT ）
快速傅立叶变换（ FFT ）
傅立叶变换的研究与应用
离散余弦变换
DCT 变换矩阵
dct2 函数和 dctmtx 函数
Walsh- Hadamard 变换
Radon 变换 -1. Image processing orthogonal frequency-domain transform Matlab two examples. Containing the frequency domain transform as follows : orthogonal transformation generic operator Fourier transform theory of Fourier transform two-dimensional Fourier nature of discrete Fourier transform (2DDF T) Fast Fourier Transform (FFT) of the Fourier transform and discrete cosine transform matrix dc t2 function and the function dctmtx Walsh-Hadamard transform Radon transform
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Author: 方周 |
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Description: 各种图像的处理，如：平滑。锐化。边缘增强。边缘检测。中值滤波去噪。沃尔什-哈达玛变换等-Deal with a variety of images, such as: smooth. Sharpening. Edge enhancement. Edge detection. Median filter denoising. Walsh- Hadamard transform
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Author: 郭志军 |
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Description: * FFT() - 快速付立叶变换
* IFFT() - 快速付立叶反变换
* DCT() - 离散余弦变换
* WALSH() - 沃尔什－哈达玛变换
*
* Fourier() - 图像的付立叶变换
* DIBDct() - 图像的离散余弦变换
* DIBWalsh() - 图像的沃尔什－哈达玛变换-* FFT ()- Fast Fourier Transform* IFFT ()- Fast Fourier Transform* DCT ()- Discrete Cosine Transform* WALSH ()- Walsh- Hadamard Transform** Fourier ()- image of pay Fourier Transform* DIBDct ()- image of discrete cosine transform* DIBWalsh ()- image of Walsh- Hadamard Transform
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Author: chaonima111 |
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Description: Fast 2D Walsh-Hadamard Transform二维快速walsh变换的码头喇叭源程序-Fast 2D Walsh-Hadamard Transform two-dimensional fast walsh transform source speaker terminals
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Size: 1024 |
Author: 许岩 |
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Description: 对二维图像进行沃尔什变换,之后用图像的四分之一进行沃尔什反变换来复原图像，并比较误差-Two-dimensional images of the Walsh transform, followed by a quarter of the image to the anti-Walsh transform to recover images, and compare the error
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Size: 1024 |
Author: 房子 |
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Description: Generates the Walsh-Hadamard codes and checks orthogonality
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Author: 郑中 |
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Description: 第十章 MATLAB 图像正交变换
10.1 正交变换通用算子
10.2 傅立叶变换
10.2.1 傅立叶变换的原理
10.2.2 傅立叶性质
10.2.3 二维离散傅立叶变换（ 2DDFT ）
10.2.4 快速傅立叶变换（ FFT ）
10.2.5 傅立叶变换的研究与应用
10.3 离散余弦变换
10.3.1 DCT 变换矩阵
10.3.2 dct2 函数和 dctmtx 函数
10.4 Walsh- Hadamard 变换
10.5 Radon 变换
10.6 小波变换
10.6.1 小波的定义
10.6.2 小波变换函数
10.6.3 小波变换实例
10.6.4 小波除噪与压缩函数 -Chapter X MATLAB image orthogonal transformation orthogonal transformation 10.1 GM 10.2 Operators 10.2.1 Fourier transform Fourier transform Fourier 10.2.2 the nature of the principle of two-dimensional 10.2.3 Discrete Fourier Transform (2DDFT) 10.2 .4 Fast Fourier Transform (FFT) 10.2.5 Fourier Transform 10.3 Research and Application of Discrete Cosine Transform 10.3.1 DCT transformation matrix 10.3.2 dct2 function and dctmtx function 10.4 Walsh-Hadamard Transform 10.5 Radon Transform 10.6 wavelet transform 10.6.1 the definition of wavelet function 10.6.2 Wavelet Transform Wavelet Transform 10.6.3 Examples 10.6.4 Wavelet Denoising and Compression Functions
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Author: 王万国 |
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Description: 实现图像几何变换函数(图像平移,图像镜像
,图像转置 ,图像缩放,图像旋转),傅里叶变换，离散余弦变换，沃尔什－哈达玛变换。输入256位图像即可使用，包含详细注释，非常有参考价值。-Image geometric transformation function (image shift, image mirroring, image transpose, image scaling, image rotation), Fourier transform, discrete cosine transform, Walsh- Hadamard Transform. 256 input image to use, contains detailed notes, a very good reference material.
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Author: yk |
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Description: Walsh Hadamard codes algorithm
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Author: ijimenez |
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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)
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Author: ry |
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Description: Walsh-Hadamard codes are mutually orthognal codes,
thus when used in synchronous CDMA, the interference between users is zero.
This programm generates Walsh-Hadamard codes and also checks the orthogonality.
You can change the code length by changing value of "code_length" at the top of program
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Author: ry |
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Description: 利用快速傅立叶算法，实现快速沃尔什-哈达玛变换及其逆变换-Using fast Fourier algorithm, fast Walsh- Hadamard transform and its inverse transform
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Size: 1024 |
Author: 韩静 |
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Description: 利用ISE编写的产生WALSH码的verilog程序，简单易懂，稍稍修改就可以产生出自己想的8 16 32 64位的WALSH码-Prepared using ISE verilog code generated WALSH procedures, easy to understand, a little modification can generate their own like the 8,16，32，64-bit code WALSH. .
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Size: 177152 |
Author: 蜡笔 |
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Description: Codigo Walsh-Hadamard y Gold, parte teórica alguna descripción del código-Codigo Walsh-Hadamard y Gold, parte teórica alguna descripción del código...
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Size: 11058176 |
Author: Ian |
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Description: 二维图像的沃尔什-哈达玛变换matlab实现。-Two-dimensional image of the Walsh- Hadamard transform matlab.
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Size: 168960 |
Author: wz |
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Description: Fast Walsh-Hadamard Transform
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Size: 1024 |
Author: Dongjie Bi |
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Description: 一、 计算图象的频谱函数
设计图象120*30/256*256；选用Matlab函数直接调用实现。
二、根据计算证明傅立叶变换的性质
1， 共轭对称性:
F(u,v)=F*(-u,-v) ;
三、图象的频域滤波
1， 设计一个指数低通滤波器，对两图象（f1(x,y)为30*30/256*256的图象；f2(x,y)=p3-02图象）进行低通滤波，观察分析空域图象和频谱分布的变化。
四、图象变换比较
利用现有的离散傅立叶变换、离散余弦变换、Walsh-Hadamard变换对同一图象实施变换，比较三种变换所得到的频谱。(1. The spectral function of the computed image
Design image: 120*30/256* 256; Use Matlab function to call the implementation directly.
The properties of Fourier transform are proved by calculation
1. Conjugate symmetry:
F (u, v) = F * (- u, v);
3. Frequency domain filtering of images
1. Design an exponential low-pass filter with two images (f1 (x,y) as 30*30/256* 256. F2 (x,y)=p3-02 image) to conduct low pass filtering to observe the change of spatial image and spectral distribution.
4. Comparison of image transformation
Using the existing discrete Fourier transform, discrete cosine transform and Walsh-Hadamard transform to transform the same image, compare the spectrum obtained by three kinds of transformations.)
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Author: LIMBO2K
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