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Description: 实现图像的对数极坐标变换，具有旋转不变性，可用于数字水印的抗几何攻击-achieving the right number of images Polar transform, with a rotating invariance, the digital watermark can be used against geometric attack
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Size: 3432 |
Author: lhl1105 |
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Description: 包括图像的灰度变换，阈值风格，彩色空间变换，彩条制作，傅里叶变换等源代码-including the gray image transformation, the threshold style, color space conversion, color of the production, such as Fourier transform source code
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Size: 4118528 |
Author: |
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Description: 实现图像的对数极坐标变换，具有旋转不变性，可用于数字水印的抗几何攻击-achieving the right number of images Polar transform, with a rotating invariance, the digital watermark can be used against geometric attack
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Size: 3072 |
Author: |
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Description: 從網路取得關於自相關log-polar變換的實作。-Obtained from the network on the autocorrelation of the log-polar transform implementations.
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Size: 3072 |
Author: 普娃兒 |
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Description: ％radon transform
clear all
％
N=800
n=1:N
fs=200
t=n/fs
x1=exp(j*2*pi*(5*t+0.5*5*t.^2))
x2=exp(j*2*pi*(5*t+0.5*15*t.^2))
x=x1+x2
％N=length(x)
％ ambifunb(x )
％*****************************************RAT
naf=ambifunb(x)
htl(abs(naf))
％ [wh,rho,theta]=htl(abs(naf))
colormap([0,0,0])
％ xlabel( 极半径 )
％ ylabel( 角度 )
％**************************************％找出峰值点的坐标,计算初始频率和调频斜率(正确)
％找出峰值点的坐标
b=max(max(wh))
[u,a]=find(wh>=0.8*b)
- Radon transformclear all N = 800 n = 1: N fs = 200 t = n/fs x1 = exp (j* 2* pi* (5* t+ 0.5* 5* t. ^ 2)) x2 = exp ( j* 2* pi* (5* t+ 0.5* 15* t. ^ 2)) x = x1+ x2 N = length (x) ambifunb (x)***************************************** RATnaf = ambifunb (x) htl (abs (naf)) [wh, rho, theta ] = htl (abs (naf)) colormap ([0,0,0]) xlabel (polar radius) ylabel (angle)************************************** to find the coordinates of the peak point, calculating the initial slope of the frequency and FM (right) find the peak point of the coordinates b = max (max ( wh)) [u, a] = find (wh
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Size: 1024 |
Author: abcde |
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Description: HDB3码的VHDL实现
共三个模块：插入V、插入B以及单双极性变换-VHDL code HDB3 realize a total of three modules: Insert V, insert B, as well as single-and double-polar transform
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Size: 1024 |
Author: Xingzhi |
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Description: 能转换源文件中的极坐标，转换成为直角坐标系下的坐标，能在屏幕上画出，保存为bmp位图文件。-Can convert the source file in the polar coordinate, Cartesian coordinate system and transform it into the coordinates, can draw on the screen, saved as bmp bitmap file.
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Size: 36864 |
Author: xiem |
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Description: 标准的对数极坐标变换，可用于图像处理中的抵抗旋转变换，笔者耗费心血的改进算法非常实用！-Standard log-polar coordinate transformation, can be used for image processing to resist rotation transformation, the author spent painstaking efforts of the improved algorithm is very practical!
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Size: 54272 |
Author: 韩宁 |
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Description: 很好用的Log-Gabor变换源代码，可以用于图像的特征提取-Good use of Log-Gabor transform source code, can be used for image feature extraction
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Size: 3072 |
Author: Ying Chen |
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Description: 图像配准，对数极坐标变换，英文论文，很好的参考文献-Epipolar Geometry and Log-Polar Transform in Wide Baseline Stereo Matching
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Size: 1243136 |
Author: tong jianfeng |
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Description: This a doc file completely describing the Fourier - Mellin transform and the whole idea behind it-This is a doc file completely describing the Fourier - Mellin transform and the whole idea behind it
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Size: 119808 |
Author: Nima |
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Description: 本程序为零序电流小波变换求首波头极性及模值大小原理:故障线路的波头极性与非故障线路相反。-This procedure is zero sequence current first wave wavelet transform modulus of the first polarity and the size principle: the first wave of fault lines fault lines and non-polar opposite.
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Size: 4096 |
Author: wugang |
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Description: 关于伪极坐标的傅里叶变换，更好的识别大尺度图像-On the pseudo-polar Fourier transform, better for large-scale image
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Size: 1423360 |
Author: lizhenhong |
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Description: (log polar transform,LPT)图像对数极坐标变换-(Log polar transform, LPT) on the log-polar coordinate transform image
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Size: 585728 |
Author: 慕南 |
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Description: 运用H15；I色彩窄间对印章图像颜色特征提取等一系列预处理，研究了多种识
别方法后发现基于纹理特征的印鉴识别方法不但速度快，而且识别率也较高，并且方法简便。通
过将极坐标和傅垦叶变换结合，计算m印签图像纹理的频谱度量，来完成印鉴的特征提取，运用支
持向量机分类器对印鉴进行识别，实验证明，方法具有良好的旋转不变纹理分析性能，提高了识别
率。-It WaS found a fast，simple and a
higher seal image(HSI)identification rate way to identify the seal characteristies ba矧on texture identification after a lot of
metlxxts W dkS studied by using a series of pre-processing including the use of HIS color space tO extract the seal oDbr image
feature．In this experiment．Fourier transform is combined with polar transform to compute the spectral of the seaJ imprint used
to achieve the characteristics of it，and support vector machine(SVM)ch．,tsifier to implement finaI identification decision of s翰I
imprint．Our experiments show that the method has good analyse capability of circumgyrating fixedness texture and cxmld
improve the identification rate．
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Size: 336896 |
Author: chen |
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Description: 很简单的对数极坐标变换程序，代码编写较为规矩，很容易看懂-Here is a log-polar image transform code,it s quite easy to read .
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Size: 4096 |
Author: 王光 |
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Description: 最近编写了一些极对数坐标转换的程序，这是最初编写的那个，希望对你们有用-Here is a log-polar image transform code.
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Size: 2048 |
Author: 王光 |
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Description: 基于MATLAB实现了极坐标下的傅里叶变换，对一个给定 n×n 的二维信号，其计算复杂度等价于笛卡尔坐标下的2D-FFT，可广泛应用于图像处理和分析。-A fast high accuracy Polar FFT algorithm is given in the software package written in MATLAB. For a given 2D signal of size n×n, the algorihtm s complexity is just like in a Cartesian 2D-FFT, which can be used widely in image processing and analysis.
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Size: 579584 |
Author: 周清保 |
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Description: 将一幅图像以任意像素点为圆心任意长度为半径做极坐标展开变换-Commence transform an image in any pixel is the center of any length radius in polar coordinates
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Size: 3702784 |
Author: 杜浩源 |
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Description: 计算图像在极坐标下的傅里叶变化
Matlab代码-Compute Polar Fourier Transform of images
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Size: 658432 |
Author: david |
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