Description: 如何在图像中加入某一固定snr的噪声？分类:matlab与图像处理
在利用matlab做一些自己算法的抗噪分析中，常常会遇到这个问题，matlab中的加噪函数是imnoise，里面的参数是噪声的均值，方差（高斯噪声）或者是感染概率（椒盐噪声），参数不能是snr值，但是很多国外的文章的噪声分析中都是用snr值来衡量加入噪声的程度的-how the image to a fixed snr noise? Categories : Matlab and image processing using Matlab to do some of his own anti-noise algorithm analysis, will often encounter this problem, which Matlab the noise function is imnoise. inside the parameters of the noise mean and variance (Gaussian noise) or the probability of infection (Impulse Noise) Parameter values can not be snr, But many foreign article noise analysis is used to measure the value snr joined the extent of noise Platform: |
Size: 2120 |
Author:顶替 |
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Description: 如何在图像中加入某一固定snr的噪声？分类:matlab与图像处理
在利用matlab做一些自己算法的抗噪分析中，常常会遇到这个问题，matlab中的加噪函数是imnoise，里面的参数是噪声的均值，方差（高斯噪声）或者是感染概率（椒盐噪声），参数不能是snr值，但是很多国外的文章的噪声分析中都是用snr值来衡量加入噪声的程度的-how the image to a fixed snr noise? Categories : Matlab and image processing using Matlab to do some of his own anti-noise algorithm analysis, will often encounter this problem, which Matlab the noise function is imnoise. inside the parameters of the noise mean and variance (Gaussian noise) or the probability of infection (Impulse Noise) Parameter values can not be snr, But many foreign article noise analysis is used to measure the value snr joined the extent of noise Platform: |
Size: 2048 |
Author:顶替 |
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Description: 一些关于图像阈值确定的matlab程序，包括迭代阈值，最小类内方差，最大熵，和用matlab库函数对图像进行边缘检测。可运行-Number of image thresholding matlab identified procedures, including iterative threshold, the smallest category of variance, maximum entropy, and the use of matlab library function of the image edge detection. Run Platform: |
Size: 30720 |
Author:刘大专 |
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Description: 对于一些图像来说，常用的边缘检测算法有时候无法设立合适的阈值将它们的梯度较小的模糊边缘检测出来。为了解决这个问题，有两种解决方法：将图像方差标准化，拉大模糊边缘的梯度值，或通过设置sigmoid函数，将像素所在区域的信息传递到梯度值中去，对其进行调整，就能找到合适阈值，有效地将模糊边缘提取出来。本程序把这两种算法实现并与与传统算法进行了比较。-For some images, the commonly used edge detection algorithm sometimes can not be an appropriate threshold for the gradient of their smaller fuzzy edge detected. To solve this problem, there are two solutions: the image variance standardization, widening the fuzzy edge of the gradient value, or by setting the sigmoid function pixel region to disseminate the message to the gradient values to adjust, on the can find a suitable threshold, effectively extracted fuzzy edge. This procedure of these two algorithms with the traditional algorithm. Platform: |
Size: 1024 |
Author:李思齐 |
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Description: 自己编写的图像质量评价函数，包括方差、平均梯度、模糊熵、信息熵-I have written the image quality evaluation function, including the variance, with an average gradient, fuzzy entropy, information entropy Platform: |
Size: 3072 |
Author:llb |
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Description: 包含了主要的图像质量评价的matlab源程序。图像熵，图像的方差和，以及基于边缘检测算子的质量评价函数。-Contains the main image quality evaluation of the matlab source code. Image entropy, variance and images, as well as edge detection operator based on the quality of the evaluation function. Platform: |
Size: 3072 |
Author:巫军 |
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Description: 计算图像的均值和方差函数，matlab编写的，可以添加到自己的图像处理中-Calculated the mean and variance of the image function, matlab prepared, can be added to their own image processing Platform: |
Size: 1024 |
Author:何钰 |
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Description: 计算图像的均方差 绝对误差 以及自熵或自信息量的函数 -Calculating the image mean absolute error variance, as well as the amount of information from the entropy of a function or self Platform: |
Size: 1024 |
Author:王红卫 |
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Description: 图像峰度偏度函数，函数的变量里需要指明平均值和方差-Image kurtosis skewness function, the function of the variable need to specify the mean and variance Platform: |
Size: 1024 |
Author:haha |
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Description: 图像处理作业 用matlab显示直方图 累积分布函数 加高斯噪声 再用平滑降噪 都是自己编的程序-Given the test image "Lenna" 256*256 with 256 gray levels, do the following:
1) Using MATLAB display the test image.
2) Display the intensity histogram of the test image.
3) Using the image histogram and cumulative distribution function, locate the intensity value such that 20 of the output pixels are saturated to 0.
4) Add Gaussian noise(mean 2, variance 4) to the test image and display the noisy image.
5) Apply smoothing and median filtering to the noisy image and display the results.
Platform: |
Size: 241664 |
Author:ouyang |
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Description: The package includes some function to process images in MATLAB platform. It contains gamma correction of an image, it calculates the entropy, it contains a way to find the distance between two histograms and it does texture analysis, from LBP and VAR (local variance) calculations. Platform: |
Size: 10240 |
Author:Luis |
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Description: 包含了主要的图像质量评价的matlab源程序。图像熵，图像的方差和，以及基于边缘检测算子的质量评价函数。-Contains the main image quality evaluation of the matlab source code. Image entropy, variance and images, as well as edge detection operator based on the quality of the evaluation function. Platform: |
Size: 3072 |
Author:erandto |
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Description: 使用Matlab实现 MAllet 快速算法的运行，开始时，根据其实现原理，先对图像进行二维小波分解，得到塔式结构，并输出，输出方差、标准差及能量函数还有小波逐层分解的示意图-Schematic use Matlab to run MAllet fast algorithm, at the start of its implementation in accordance with the principles, the first of a two-dimensional image wavelet decomposition, the tower structure and output, the output variance, standard deviation and energy function as well as the wavelet decomposition layer by layer Platform: |
Size: 19456 |
Author:陈春红 |
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Description: 应用小区域方差对比，程序简单，ggnKMpb参数粒子图像分割及匹配均为自行编制的子例程，有较好的参考价值，BP神经网络用于函数拟合与模式识别，vUjYAOf条件相关分析过程的matlab方法，使用大量的有限元法求解偏微分方程。- Application of small area variance comparison, simple procedures, ggnKMpb parameter Particle image segmentation and matching subroutines themselves are prepared, There are good reference value, BP neural network function fitting and pattern recognition, vUjYAOf condition Correlation analysis process matlab method, Using a large number of finite element method to solve partial differential equations. Platform: |
Size: 5120 |
Author:ftvrpr |
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Description: 包括广义互相关函数GCC时延估计，在MATLAB中求图像纹理特征，可以得到很精确的幅值、频率、相位估计，连续相位调制信号(CPM)产生，复化三点Gauss-lengend公式求pi，应用小区域方差对比，程序简单。- Including the generalized cross-correlation function GCC time delay estimation, In the MATLAB image texture feature, You can get a very accurate amplitude, frequency, phase estimation, Continuous phase modulation signal (CPM) to produce, Complex of three-point Gauss-lengend the Formula pi, Application of small area variance comparison, simple procedures. Platform: |
Size: 10240 |
Author:uiagxqbzd |
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Description: 带通滤波器（Butterworth、椭圆、窗函数），采样率fs＝2000Hz, 通带范围为300 -600Hz，阶数自选, 画出频率响应并分析比较，
对cameraman.tif图像分别添加椒盐噪声（密度为0.03）和高斯白噪声（均值为0，方差为0.02）的图像，利用三种方法进行去噪，显示原始图像、加噪图像和去噪图像并对实验结果进行分析(Band pass filter (Butterworth, ellipse, window function), sampling rate FS = 2000Hz, passband range of 300 -600Hz, order optional, draw frequency response, and analysis and comparison,
Respectively, add salt and pepper noise of the cameraman.tif image (density of 0.03) and Gauss white noise (mean 0 and variance 0.02) image denoising using three methods, shows the original image, noise image and image denoising and analysis of experimental results) Platform: |
Size: 1024 |
Author:潇潇暮雨
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Description: J = imnoise(I,'localvar',IMAGE_INTENSITY,VAR) adds zero-mean, Gaussian
noise to an image, I, where the local variance of the noise is a
function of the image intensity values in I. IMAGE_INTENSITY and VAR
are vectors of the same size, and PLOT(IMAGE_INTENSITY,VAR) plots the
functional relationship between noise variance and image intensity.
IMAGE_INTENSITY must contain normalized intensity values ranging from 0
to 1. Platform: |
Size: 2048 |
Author:Hoang Cuong
|
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Description: adds zero-mean, Gaussian noise to an image, I, where the local variance of the noise is a
function of the image intensity values in I. IMAGE_INTENSITY and VAR
are vectors of the same size, and PLOT(IMAGE_INTENSITY,VAR) plots the
functional relationship between noise variance and image intensity.
IMAGE_INTENSITY must contain normalized intensity values ranging from 0
to 1. Platform: |
Size: 1024 |
Author:Hoang Cuong
|
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Search - Variance Function matlab image