matlab.m

matlab code for image processing

function varargout = matlab(varargin)
% MATLAB M-file for matlab.fig
%      MATLAB, by itself, creates a new MATLAB or raises the existing
%      singleton*.
%
%      H = MATLAB returns the handle to a new MATLAB or the handle to
%      the existing singleton*.
%
%      MATLAB('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in MATLAB.M with the given input arguments.
%
%      MATLAB('Property','Value',...) creates a new MATLAB or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before matlab_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to matlab_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 matlab

% Last Modified by GUIDE v2.5 13-Jan-2009 00:40:56

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @matlab_OpeningFcn, ...
                   'gui_OutputFcn',  @matlab_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 matlab is made visible.
function matlab_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 matlab (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = matlab_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.

% 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)


% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)

[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
%b=rgb2gray(f);
k=imfinfo(temp);
height=k.Height;
width=k.Width;
c=1;
gamma=10;
for i = 1:height
    for j = 1:width
         powerlaw(i,j)=c*(f(i,j).^gamma);
    end
end
  figure,imshow(f),figure,imshow(powerlaw);
% 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)


% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)

[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
%f = rgb2gray(f);
k=imfinfo(temp);
height=k.Height;
width=k.Width;
gray_slice =f;
for i = 1:height
    for j = 1:width
        if(f(i,j)<256 && f(i,j)>50)
        gray_slice(i,j)=255;
        else
        gray_slice(i,j)=0;
        end
    end
end
figure,imshow(f),figure,imshow(gray_slice)


% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)

[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
k=imfinfo(temp);
height=k.Height;
width=k.Width;
pic = im2double(f);
c=1;

for i = 1:height
    for j = 1:width
        logtransform(i,j)=c*log(1+pic(i,j));
    end
end
figure,imshow(f),figure,imshow(logtransform);
% 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)


% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
d=im2double(f); 
w4=fspecial('average');
g4=imfilter(d,w4,'replicate');

figure,imshow(f),figure,imshow(g4);
% hObject    handle to pushbutton5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton6.
function pushbutton6_Callback(hObject, eventdata, handles)
[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
d=im2double(f); 
w4=fspecial('average');
g4=imfilter(d,w4,'replicate');
figure,imshow(f),figure,imshow(g4);

% hObject    handle to pushbutton6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton7.


% hObject    handle to pushbutton7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton8.
function pushbutton8_Callback(hObject, eventdata, handles)
[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
f=im2double(f);
g=fspecial('laplacian',0);
g2=f-imfilter(f,g,'replicate');
figure,imshow(f),figure,imshow(g2);
% hObject    handle to pushbutton8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton9.
function pushbutton9_Callback(hObject, eventdata, handles)

[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
d=im2double(f);
fn=imnoise(d,'salt & pepper',0.2);
gm=medfilt2(fn,'symmetric');
figure,imshow(f),figure,imshow(gm);

% hObject    handle to pushbutton9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton10.
function pushbutton10_Callback(hObject, eventdata, handles)
[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
d=im2double(f); 
g4=ordfilt2(d,1,ones(3,3));
figure,imshow(f),figure,imshow(g4);
% hObject    handle to pushbutton10 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton11.
function pushbutton11_Callback(hObject, eventdata, handles)

[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
d=im2double(f); 
w4=fspecial('unsharp',0);
g4=imfilter(d,w4,'replicate');
figure,imshow(f),figure,imshow(g4);
% hObject    handle to pushbutton11 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton12.
function pushbutton12_Callback(hObject, eventdata, handles)

[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
d=im2double(f); 
w4=fspecial('sobel');
g4=imfilter(d,w4,'replicate');
figure,imshow(f),figure,imshow(g4);
% hObject    handle to pushbutton12 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton13.
function pushbutton13_Callback(hObject, eventdata, handles)

[FileName,PathName] = uigetfile('*.jpg','Select an JPEG image');
file= [PathName,FileName];
img=imread(file);
f=img;  
P=5;
[M,N,O]=size(f);  
F=fft2(double(f));  
u=0:(M-1);  
v=0:(N-1);  
idx=find(u>M/2);  
u(idx)=u(idx)-M;  
idy=find(v>N/2);  
v(idy)=v(idy)-N;  
[V,U]=meshgrid(v,u);  
D=sqrt(U.^2+V.^2);  
H=double(D<=P);  
G=F;  
for i = 1:O  
    G(:,:,i) = H.*F(:,:,i);  
end  
g=uint8(real(ifft2(double(G))));  
figure,imshow(f),figure,imshow(g); 
% hObject    handle to pushbutton13 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton14.
function pushbutton14_Callback(hObject, eventdata, handles)

[FileName,PathName] = uigetfile('*.jpg','Select an JPEG image');
file= [PathName,FileName];
img=imread(file);
f=img;  
P=5;
[M,N,O]=size(f);  
F=fft2(double(f));  
u=0:(M-1);  
v=0:(N-1);  
idx=find(u>M/2);  
u(idx)=u(idx)-M;  
idy=find(v>N/2);  
v(idy)=v(idy)-N;  
[V,U]=meshgrid(v,u);  
D=sqrt(U.^2+V.^2);  
n=2;
H=1./(1+(D./P).^(2*n));  
G=F;  
for i = 1:O  
    G(:,:,i) = H.*F(:,:,i);  
end  
g=uint8(real(ifft2(double(G))));  
figure,imshow(f),figure,imshow(g);  
% hObject    handle to pushbutton14 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton15.
function pushbutton15_Callback(hObject, eventdata, handles)
[FileName,PathName] = uigetfile('*.jpg','Select an JPEG image');
file= [PathName,FileName];
img=imread(file);
f=img;  
P=5;
[M,N,O]=size(f);  
F=fft2(double(f));  
u=0:(M-1);  
v=0:(N-1);  
idx=find(u>M/2);  
u(idx)=u(idx)-M;  
idy=find(v>N/2);  
v(idy)=v(idy)-N;  
[V,U]=meshgrid(v,u);  
D=sqrt(U.^2+V.^2);  
H=exp(-(D.^2)./(2*(P^2)));  
G=F;  
for i = 1:O  
    G(:,:,i) = H.*F(:,:,i);  
end  
g=uint8(real(ifft2(double(G))));  
figure,imshow(f),figure,imshow(g); 
% hObject    handle to pushbutton15 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton16.
function pushbutton16_Callback(hObject, eventdata, handles)

[FileName,PathName] = uigetfile('*.jpg','Select an JPEG image');
file= [PathName,FileName];
img=imread(file);
f=img;  
P=15;
[M,N,O]=size(f);  
F=fft2(double(f));  
u=0:(M-1);  
v=0:(N-1);  
idx=find(u>M/2);  
u(idx)=u(idx)-M;  
idy=find(v>N/2);  
v(idy)=v(idy)-N;  
[V,U]=meshgrid(v,u);  
D=sqrt(U.^2+V.^2);  
H=double(D>=P);  
G=F;  
for i = 1:O  
    G(:,:,i) = H.*F(:,:,i);  
end  
g=uint8(real(ifft2(double(G))));  
figure,imshow(f),figure,imshow(g);
% hObject    handle to pushbutton16 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton17.
function pushbutton17_Callback(hObject, eventdata, handles)
[FileName,PathName] = uigetfile('*.jpg','Select an JPEG image');
file= [PathName,FileName];
img=imread(file);
f=img;  
P=80;
[M,N,O]=size(f);  
F=fft2(double(f));  
u=0:(M-1);  
v=0:(N-1);  
idx=find(u>M/2);  
u(idx)=u(idx)-M;  
idy=find(v>N/2);  
v(idy)=v(idy)-N;  
[V,U]=meshgrid(v,u);  
D=sqrt(U.^2+V.^2);  
n=2;
H=1./(1+(P./D).^(2*n));  
G=F;  
for i = 1:O  
    G(:,:,i) = H.*F(:,:,i);  
end  
g=uint8(real(ifft2(double(G))));  
figure,imshow(f),figure,imshow(g);



% hObject    handle to pushbutton17 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton18.
function pushbutton18_Callback(hObject, eventdata, handles)
[FileName,PathName] = uigetfile('*.jpg','Select an JPEG image');
file= [PathName,FileName];
img=imread(file);
f=img;  
P=15;
[M,N,O]=size(f);  
F=fft2(double(f));  
u=0:(M-1);  
v=0:(N-1);  
idx=find(u>M/2);  
u(idx)=u(idx)-M;  
idy=find(v>N/2);  
v(idy)=v(idy)-N;  
[V,U]=meshgrid(v,u);  
D=sqrt(U.^2+V.^2);  
H=1.-(exp(-(D.^2)./(2*(P^2))));  
G=F;  
for i = 1:O  
    G(:,:,i) = H.*F(:,:,i);  
end  
g=uint8(real(ifft2(double(G))));  
figure,imshow(f),figure,imshow(g);
% hObject    handle to pushbutton18 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton19.
function pushbutton19_Callback(hObject, eventdata, handles)
[FileName,PathName]=uigetfile('*.jpg,''Select image:');
temp=[PathName,FileName];
f=imread(temp);
%f = rgb2gray(f);
k=imfinfo(temp);
d=k.Height;
e=k.Width;
max_gray = max(max(f));
max_gray = im2double(max_gray);
pic = im2double(f);
pic_negative=pic;
for i = 1:d
    for j = 1:e
        pic_negative(i,j)= max_gray - pic(i,j);
    end
end
figure,imshow(f),figure,imshow(pic_negative); 
% hObject    handle to pushbutton19 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)