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SIP_Project.m
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% SIP Project: Smooth an image using Gradient-Inverse and Lee filter. Compare both.
% Submitted by- Rajat Shinde*, Brijesh Kr. Maravi, Paras Jhajharia
% *M.Tech 1st year, CSRE, IIT Bombay.
function varargout = SIP_Project(varargin)
% SIP_PROJECT MATLAB code for SIP_Project.fig
% SIP_PROJECT, by itself, creates a new SIP_PROJECT or raises the existing
% singleton*.
%
% H = SIP_PROJECT returns the handle to a new SIP_PROJECT or the handle to
% the existing singleton*.
%
% SIP_PROJECT('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in SIP_PROJECT.M with the given input arguments.
%
% SIP_PROJECT('Property','Value',...) creates a new SIP_PROJECT or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before SIP_Project_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to SIP_Project_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 SIP_Project
% Last Modified by GUIDE v2.5 25-Oct-2016 13:58:11
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @SIP_Project_OpeningFcn, ...
'gui_OutputFcn', @SIP_Project_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 SIP_Project is made visible.
function SIP_Project_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 SIP_Project (see VARARGIN)
% Choose default command line output for SIP_Project
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes SIP_Project wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = SIP_Project_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 pushbutton2.
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)
% Function for comparing outputs obtained by
%Lee filter and Gradient-Inverse fliter.
global outputImageLee
global outputImageGrad
figure,subplot(221),imshow(outputImageLee);
outputImageLee_BW=rgb2gray(outputImageLee);
subplot(222),imhist(outputImageLee_BW);
subplot(223),imshow(outputImageGrad);
outputImageGrad_BW=rgb2gray(outputImageGrad);
subplot(224),imhist(outputImageGrad_BW);
function edit_grad_Callback(hObject, eventdata, handles)
% hObject handle to edit_grad (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit_grad as text
% str2double(get(hObject,'String')) returns contents of edit_grad as a double
% --- Executes during object creation, after setting all properties.
function edit_grad_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit_grad (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
% --- Executes on button press in pushbutton_grad.
function pushbutton_grad_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton_grad (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%Function to compute output after applying Gradient-Inverse filter.
% It takes value of centre pixel weight from user.
% Used for smoothening.
global inputImage;
global outputImageGrad;
inputImage=im2double(inputImage);
inputImage=inputImage(:,:,1);
u=zeros(3);
h=zeros(3);
r=str2double(get(handles.edit_grad,'String'));
outputImageGrad=zeros(size(inputImage));
[row ,col]=size(inputImage);
rad_value1=get(handles.radiobutton_33,'Value');
rad_value2=get(handles.radiobutton_55,'Value');
rad_value3=get(handles.radiobutton_77,'Value');
if rad_value1==1 %selecting the window size.
window_dim= 3;
elseif rad_value2==1
window_dim=5;
else
window_dim=7;
end
s=floor(window_dim/2);
inputImage=padarray(inputImage,[s,s],'replicate');
for i=(1+s):(row-s-2)
for j=(1+s):(col-s-2)
for k=-s:1:s
for l=-s:1:s
if inputImage(i+k,j+l)~=inputImage(i+k+s-1,j+l+s-1)
u(k+s+1,l+s+1)=abs(1/(inputImage(i+k+s-1,j+l+s-1)-inputImage(i+k,j+l)));
else
u(k+s+1,l+s+1)=0.5;
end
end
end
for k=-1:1:1
for l=-1:1:1
h(k+2,l+2)=r*u(k+2,l+2)/sum(u(:));
outputImageGrad(i,j)=outputImageGrad(i,j)+(h(k+2,l+2)*inputImage(i-k,j-l));
end
end
end
end
figure;
set(gcf,'numbertitle','off','name','Output and Histogram of Gradient-Inverse filter')
imtool(outputImageGrad);
title('Output');
% outputImageGrad_BW=rgb2gray(outputImageGrad);
% subplot(222),imhist(outputImageGrad_BW);
% title('Histogram');
function edit_lee_Callback(hObject, eventdata, handles)
% hObject handle to edit_lee (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit_lee as text
% str2double(get(hObject,'String')) returns contents of edit_lee as a double
% --- Executes during object creation, after setting all properties.
function edit_lee_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit_lee (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
% --- Executes on button press in pushbutton_lee.
function pushbutton_lee_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton_lee (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%Function which computes output after applying lee filter.
%The weighing function is taken as input from user.
%Window size is also selected by user.
weighing_function=str2double(get(handles.edit_lee,'String'));
global inputImage
global outputImageLee
inputImage=im2double(inputImage);
outputImageLee= zeros(size(inputImage));
[row, col]=size(inputImage); %calculates size of input image.
rad_value1=get(handles.radiobutton_33,'Value');
rad_value2=get(handles.radiobutton_55,'Value');
rad_value3=get(handles.radiobutton_77,'Value');
if rad_value1==1
window_dim= 3;
elseif rad_value2==1
window_dim=5;
else
window_dim=7;
end
s=floor(window_dim/2);
inputImage=padarray(inputImage,[s,s],'replicate');
sum_of_elements=0;
for i=(1+s):(row-s-2)
for j=(1+s):(col-s-2)
for k=-s:1:s
for l=-s:1:s
x = inputImage(i-k,j-l);
sum_of_elements = sum_of_elements+x; % To calculate mean of all elements of a kernel.
end
end
mean_elements= sum_of_elements/(window_dim * window_dim);
outputImageLee(i,j)= mean_elements+ (weighing_function*(inputImage(i,j)-mean_elements));
sum_of_elements=0;
end
end
figure;
set(gcf,'numbertitle','off','name','Output and Histogram of Lee filter')
imtool(outputImageLee);
title('Output');
%outputImageLee_BW=rgb2gray(outputImageLee);
%subplot(222),imhist(outputImageLee_BW);
%title('Histogram');
% --- Executes on button press in image_browse.
function image_browse_Callback(hObject, eventdata, handles)
% hObject handle to image_browse (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%To load an image from existing directory.
global inputImage
[row col]=size(inputImage);
[path, user_cance] =imgetfile();
if user_cance
msgbox(sprintf('Error'),'Error','Error');
return
end
inputImage=imread(path);
inputImage=im2double(inputImage);
axes(handles.axes_original_image);
imtool(inputImage);
set(handles.edit_path,'String',path);
set(handles.edit_size,'String',(row*col));
function edit_path_Callback(hObject, eventdata, handles)
% hObject handle to edit_path (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit_path as text
% str2double(get(hObject,'String')) returns contents of edit_path as a double
% --- Executes during object creation, after setting all properties.
function edit_path_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit_path (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
function edit_size_Callback(hObject, eventdata, handles)
% hObject handle to edit_size (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit_size as text
% str2double(get(hObject,'String')) returns contents of edit_size as a double
% --- Executes during object creation, after setting all properties.
function edit_size_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit_size (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end