RAYLEIGH_NOISE_CVIP

rayleigh_noise_cvip() - adds Rayleigh noise to an image.

SYNTAX
DESCRIPTION
REFERENCE
EXAMPLE
CREDITS

SYNTAX

outImage = rayleigh_noise_cvip(inImage, var, noiseImgSize)

Input Parameters include :

inImage - 1-band input image of MxN size or 3-band input image of MxNx3 size. The input image can be of uint8 or uint16 or double class.
var - variance of Rayleigh noise. (default 100)

noiseImgSize - Size of Rayleigh noise image. Only needed when noise is added to black image. noiseImgSize(1): height (default 256) noiseImgSize(2): width (default 256)

Output Parameter includes :

outImage - Rayleigh noise added image or Rayleigh noise image

DESCRIPTION

The function adds Rayleigh noise to an image or creates Rayleigh noise image. If user wants to add Rayleigh noise to the image, the user needs to pass only two input arguments (input image, and noise variance). If user wants to create a Rayleigh noise image only, pass input image as an empty matrix [ ]. The size of the noise image can be defined by passing additional parameter (size of noise image). If not passed, default size of 256*256 will be selected.

REFERENCE

1. Scott E Umbaugh. DIGITAL IMAGE PROCESSING AND ANALYSIS: Applications with MATLAB and CVIPtools, 3rd Edition.

EXAMPLE

%Read image

 I = imread('butterfly.tif');

% Calling function with default parameters

 O1 = rayleigh_noise_cvip(I);

% Calling function with user defined parameters

 noise_parameter = 200;

% Rayleigh noise added image

 O2 = rayleigh_noise_cvip(I,noise_parameter);

% Rayleigh noise image

 image_size = [300 400];        %height = 300, width = 400

 O3 = rayleigh_noise_cvip([],noise_parameter, image_size);

% Display input image

 figure;imshow(I);title('Input image');

% Display output image

 figure;imshow(hist_stretch_cvip(O1,0,1,0,0));title('Output image with default parameters')

 figure;imshow(hist_stretch_cvip(O2,0,1,0,0));title(' Output image with Noise added Image');

 figure;imshow(hist_stretch_cvip(O3,0,1,0,0));title(' Output image with Rayleigh noise only');

RAYLEIGH_NOISE_CVIP

Contents

SYNTAX

DESCRIPTION

REFERENCE

EXAMPLE

CREDITS