imgnormcdf.m

matlab图象增强代码集合。多个代码。英文。

function icdfnorm = imgnormcdf(img)
% Author: Javier Montoya ([e-mail]).
%         http://www.lis.ic.unicamp.br/~jmontoya
%
% IMGNORMPDF normalizes the CDF of image I.
% Input parameters:
%    img: image I (passed as a bidimensional matrix).
% Ouput parameters:
%    icdfnorm: normalized cdf
%
% See also: IMGCDF
%
% Usage:
%    I        = imread('tire.tif');
%    icdfnorm = imgnormcdf(I);
%    figure; stem(icdfnorm); title('Normalized CDF');

   if exist('img', 'var') == 0
      error('Error: Specify an input image.');
  else
   icdfnorm    = [];
   [rows,cols] = size(img);
   icdf        = imgcdf(img);
   icdfnorm    = icdf/rows/cols;
  end