April 2018 ~ Low Price Projects

Matlab Code for Study of Gaussian Filter

MATLAB CODE: %%%%%%%%%%%%% The main.m file %%%%%%%%%%%%%%% clear; % Parameters of the Gaussian filter: n1=10;sigma1=3;n2=10;sigma2=3;theta1=0; % The amplitude of the noise: noise=0.1; [w,map]=gifread('lena.gif'); x=ind2gray(w,map); filter1=d2gauss(n1,sigma1,n2,sigma2,theta); x_rand=noise*randn(size(x)); y=x+x_rand; f1=conv2(x,filter1,'same'); rf1=conv2(y,filter1,'same'); figure(1); subplot(2,2,1);imagesc(x); subplot(2,2,2);imagesc(y); subplot(2,2,3);imagesc(f1); subplot(2,2,4);imagesc(rf1); colormap(gray); %%%%%%%%%%%%%%...

Matlab Code for Image Thresholding

Roshan Helonde

This program show the effect of thresholding. The output are four subfigures shown in the same figure: MATLAB CODE: %%%%%%%%%%%%% The main.m file %%%%%%%%%%%%%% clear; % Threshold level parameter alfa: alfa=0.1;% less than 1/3 [x,map]=gifread('lena.gif'); ix=ind2gray(x,map); I_max=max(max(ix)); I_min=min(min(ix)); level1=alfa*(I_max-I_min)+I_min; level2=2*level1; level3=3*level1; thix1=max(ix,level1.*ones(size(ix))); thix2=max(ix,level2.*ones(size(ix))); thix3=max(ix,level3.*ones(size(ix))); figure(1);colormap(gray); subplot(2,2,1);imagesc(ix);title('lena'); subplot(2,2,2);imagesc(thix1);title('threshold...

Matlab Code for Browse file in MATLAB

Roshan Helonde

% Here, example source code for browse image file from any where, then show the image. close all clear all %----------------------------------- [F,PathName,FilterIndex] = uigetfile({'*.*','All Files(*.*)'}, 'Select your File '); loadimage = strcat(PathName,F); input = importdata(loadimage); %------------ Display -------------- figure() image(input);...

Matlab Code for Linear Regression and R Square in MATLAB

Roshan Helonde

%Here, sample code for linear regression and R square calculation close all clear all %---------- generate x-data and y-data --------- x=[1,1.2,1.53,1.64,2.15,2.36]; y=[151.4,142.9,135.3,116.42,91.9,70.8]; %----------- Linear regression ----------------- p= polyfit(x,y,1); f= polyval(p,x); %----------- Call R-square function ------------ r2=Rsquare(x,y,p); %-------------...