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Study of White gaussian noise and Computation of its statistical parameters using Matlab,study

In signal processing, white noise is a random signal with a flat (constant) power spectral density. In other words, it is a signal that contains equal power within any frequency band with a fixed width. The parameter μ in this formula is the mean or expectation of the distribution (and al...
  Matlab        Matlab     

MATLAB-based research on time-frequency characteristics of two-dimensional gaussian low-pass filter and its application to mimic the point spread function (PSF:point spread function) in the application of image degradation modeling

Use fspecial Function to generate a two-dimensional gaussian Low-pass filter, drawing its time-domain and  frequency-domain one, two and three dimensional graphics, understanding gaussian The temporal characteristics  of the filter ( PSF Model) and frequency-domain characterist...
  Matlab        Matlab     

gaussian noise pulses

H.264 introduces two new features to ME, the VBSME and the sub-pixel accuracy motion estimation. The VBSME is carried out in two phases: integer motion estimation (IME) and fractional motion estimation (FME). In H.264, VP8 and other video codec, a 1616 sized macro-block can be further partitio...
  Matlab        Matlab     

Additive White gaussian noise ( AWGN) , Channel

How to create AWGN Channel in matlab. Very simple and lucid method, code is tagged  with comments  wherever it is required. Very wasy to understand. AWGN stands for Additive White gaussian Channel .  Additive white gaussian noise (AWGN) is a basic noise model use...
  Matlab        Matlab     

gaussian Mixture Model

gaussian Mixture Model matlab In statistics, a mixture model is a probabilistic model for representing the presence of subpopulations within an overall population, without requiring that an observed data set should identify the sub-population to which an individual observation belongs....
  Matlab        Matlab     

This is a 3D visualization of how the Expectation Maximization algorithm learns a gaussian Mixture Model for 3-dimensional data.

Traditional single particle reconstruction methods use either the Fourier or the delta function basis to represent the particle density map. We propose a more flexible algorithm that adaptively chooses the basis based on the data. Because the basis adapts to the data, the reconstruction resolutio...
  Graph        C     

Colorhistogram

close all; clear all clc; I = imread('lavender.jpg'); imshow(I),figure I = im2double(I); [index,map] = rgb2ind(I); pixels = prod(size(index)); hsv = rgb2hsv(map); h = hsv(:,1); s = hsv(:,2); v = hsv(:,3); %Finds location of black and white pixels darks = find(v < .2)'; lights = find...
  Matlab        Matlab     

Eliminarea gaussiana

Eliminarea gaussiana este o tehnica pentru reducerea sistemului Ax = b la un sistem superior triunghiular echivalent...
  Matlab        Matlab     

gaussian white noise generator

White gaussian noise: If a noise, its amplitude distribution gaussian distribution, and its power spectral density is  uniform, then called it a gaussian White noise. Thermal noise, shot noise is gaussian white noise. The so-called gaussian is the probability distribution of Ga...
  Matlab        C     

plotting noise

used to plot gaussian noise. these programs are used in the calculation of snr of a noise channel while transmitting a signal...
  Communication        Matlab     

noise estimation

image denoising algorithms often require their parameters to be adjusted according to the noise level. We propose a fast and reliable method for estimating image noise. The input image is assumed to be contaminated by an additive white gaussian noise process. To exclude structures or details fr...
  Windows        Matlab     

gaussian filter source code

The gaussian filter is a linear smoothing filter, suitable for removing gaussian noise, the noise reduction process widely used in image processing. Generally speaking, gaussian filter is the whole image is weighted average process, every pixel values is represented by its own and other pixel values...
  Matlab        Matlab     

gaussian process regression

The program for gaussian processs regression and classification. Wonderful working programme. A simple one-dimensional regression exercise computed in two different ways: A noise-free case with a cubic correlation model A noisy case with a squared Euclidean cor...
  Matlab        Matlab     

gaussian Mixture Cardinalized Probability Hypothesis Density Filter

Particle filters or Sequential Monte Carlo (SMC) methods are a set of on-line posterior density estimation algorithms that estimate the posterior density of the state-space by directly implementing the Bayesian recursion equations. SMC methods use a grid-based appr...
  Matlab        Matlab     

histograma

programa que hace un histograma de una imagen  programa que hace un histograma de una imagen  programa que hace un histograma de una imagen  programa que hace un histograma de una imagen  programa que hace un histograma de una imagen  programa q...
  Algorithm        C#     

histogram EQUALISATION OF AN IMAGE

Aim: To write MATLAB function forhistogram equalisation of an image using MATLAB function and without using MATLAB function Theory: The histogram of an image is a plot of the number of occurrences of gray levels in the image against the gray- level values. histogram equalization is a method in...
  Image Processing        Matlab     

histogram Equalization

int main() { char infilename[20]; char outfilename[20]; Printf ("Please enter image name: n"); scanf("%s",infilename); if( ReadInfo(infilename) ) { if(histogram()) { Printf ("Please enter the output image name and. bmp over n"); scanf("%s",outfilename); WriteToFile(outfilename); } } e...
  图像处理        C     

Match histograms

Used to compare two histograms of input/query images.the histogram of a database image will be compared with the histogram of input image and if a match is found both the images are appended using the imappend command ..this can be helpful in comparing two images in american sign language recognitio...
  GUI        Matlab     

gaussian mixture background model

By QT and OpenCV, using gaussian mixture model, read local video window, background modeling using gaussian mixture model. Mixture gaussian mixture model in the new opencv2.31 integrated shading....
  Image Processing        C++     

adding noise to image

unction [ noisy, noise ] = addnoise( signal, noise, snr ) % ADDnoise Add noise to signal at a prescribed SNR level. % %   [NOISY,noise]=ADDnoise(SIGNAL,noise,SNR) adds noise to SIGNAL %   at a prescribed SNR level. Returns the mixture signal as well %   as scaled...
  Matlab        Matlab     

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