MATLAB Examples

Contents

function varargout = start(varargin)
% START M-file for start.fig
%      START, by itself, creates a new START or raises the existing
%      singleton*.
%
%      H = START returns the handle to a new START or the handle to
%      the existing singleton*.
%
%      START('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in START.M with the given input arguments.
%
%      START('Property','Value',...) creates a new START or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before start_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to start_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help start

% Last Modified by GUIDE v2.5 19-Feb-2014 11:29:31

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @start_OpeningFcn, ...
                   'gui_OutputFcn',  @start_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before start is made visible.
function start_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to start (see VARARGIN)

% Choose default command line output for start
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes start wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = start_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

%Matlab program for finding Histogram of Grayscale image without using imhist function

%@Author: Kamal Hajari

Read Image from directory

[filename, pathname] = uigetfile({'*.*';'*.png';'*.jpg';'*.tif'}, 'Pick an Image File');
i1 = imread([pathname,filename]);
subplot(2,2,2); imshow(i1);
title('Original Image-1');
handles.i1 = i1;

save('im1.mat','i1');
guidata(hObject, handles);
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

Program for genrartion of Histogram

t = load('im1.mat');
i1 = [t.i1];
s = size(i1);
s1 = s(1);
s2 = s(2);
for i = 0 : 255
        x=0;                % intensity range Loop
        for j = 1 : s(1)    % row counter
        for k = 1 : s(2)    % column counter

        if(i1(j,k) == i)
        x = x + 1;
        end
        k = k + 1;
        end
        j = j + 1;
        end

        index1(i+1,1) = x;
        i = i + 1 ;   %count intensity loop

end

save('countv1.mat','index1');

show_img = figure('Name','Histogram Plot(without Function)','NumberTitle','off');

im11 = handles.i1;

figure(show_img),subplot(2,2,1); imshow(im11);

title('Original Image-1');

subplot(2,2,2); plot(index1);

title('Histogram plot');

subplot(2,2,3); bar(index1);

title('Histogram plot(bar)');
function pushbutton4_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
close start;