Posted by adi pamungkas
SEP 29
Complement Image (Negative Image)
1 Vote
Citra negatif merupakan citra yang nilai pikselnya berkebalikan dengan citra aslinya. Untuk citra grayscale
8 bit, apabila citra asli disimbolkan dengan I, maka negatif dari citra tersebut adalah I’ = 255‐I. Contoh
perhitungan nilai piksel dari citra negatif ditunjukkan pada gambar di bawah ini:
Berikut ini merupakan pemrograman GUI Matlab mengenai citra komplemen/ citra negatif
1. Citra RGB (RGB Image)
2. Citra Grayscale (Grayscale Image)
3. Citra Biner (Binary Image)
Source Code:
function varargout = Negative_Image(varargin)
% NEGATIVE_IMAGE MATLAB code for Negative_Image.fig
% NEGATIVE_IMAGE, by itself, creates a new NEGATIVE_IMAGE or raises the existing % singleton*.
%
% H = NEGATIVE_IMAGE returns the handle to a new NEGATIVE_IMAGE or the handle to % the existing singleton*.
%
% function named CALLBACK in NEGATIVE_IMAGE.M with the given input arguments. %
% NEGATIVE_IMAGE('Property','Value',...) creates a new NEGATIVE_IMAGE or raises the % existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before Negative_Image_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to Negative_Image_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 Negative_Image
% Last Modified by GUIDE v2.5 29Sep2015 00:12:38
% Begin initialization code DO NOT EDIT gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @Negative_Image_OpeningFcn, ... 'gui_OutputFcn', @Negative_Image_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 Negative_Image is made visible.
function Negative_Image_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 Negative_Image (see VARARGIN)
% Choose default command line output for Negative_Image handles.output = hObject;
% Update handles structure guidata(hObject, handles); movegui(hObject,'center'); clc;clear;
% UIWAIT makes Negative_Image wait for user response (see UIRESUME) % uiwait(handles.figure1);
% Outputs from this function are returned to the command line.
% 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) [filename,pathname] = uigetfile('*.*');
if ~isequal(filename,0)
Img = imread(fullfile(pathname,filename)); [~,~,m] = size(Img);
if m == 3
axes(handles.axes1) imshow(Img)
handles.Img = Img;
guidata(hObject, handles) else
msgbox('Please insert RGB Image') end
else return end
% Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles) % hObject handle to radiobutton1 (see GCBO)
% eventdata reserved to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton1 set(handles.radiobutton1,'Value',1)
set(handles.radiobutton2,'Value',0) set(handles.radiobutton3,'Value',0)
Img = handles.Img; axes(handles.axes1) cla('reset')
imshow(Img)
R = Img(:,:,1); G = Img(:,:,2); B = Img(:,:,3);
axes(handles.axes2) cla('reset')
h = histogram(G(:),256); h.FaceColor = [0 1 0]; h.EdgeColor = 'g';
h = histogram(B(:),256); h.FaceColor = [0 0 1]; h.EdgeColor = 'b'; grid on
set(gca,'Xlim',[0 255]) hold off
% Image Complement
Img_Comp = imcomplement(Img);
axes(handles.axes3) cla('reset')
imshow(Img_Comp)
R = Img_Comp(:,:,1); G = Img_Comp(:,:,2); B = Img_Comp(:,:,3);
axes(handles.axes4) cla('reset')
h = histogram(R(:),256); h.FaceColor = [1 0 0]; h.EdgeColor = 'r'; hold on
h = histogram(G(:),256); h.FaceColor = [0 1 0]; h.EdgeColor = 'g';
h = histogram(B(:),256); h.FaceColor = [0 0 1]; h.EdgeColor = 'b'; set(gca,'Xlim',[0 255]) grid on
hold off
% Executes on button press in radiobutton2.
function radiobutton2_Callback(hObject, eventdata, handles) % hObject handle to radiobutton2 (see GCBO)
% eventdata reserved to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton2 set(handles.radiobutton1,'Value',0)
set(handles.radiobutton2,'Value',1) set(handles.radiobutton3,'Value',0)
Img = handles.Img; Gray = rgb2gray(Img);
axes(handles.axes1) cla('reset')
axes(handles.axes2) cla('reset')
h = histogram(Gray(:),256); h.FaceColor = [0.5 0.5 0.5]; h.EdgeColor = [0.5 0.5 0.5]; set(gca,'Xlim',[0 255]) grid on
% Image Complement
Gray_Comp = imcomplement(Gray); axes(handles.axes3)
cla('reset') imshow(Gray_Comp)
axes(handles.axes4) cla('reset')
h = histogram(Gray_Comp(:),256); h.FaceColor = [0.5 0.5 0.5]; h.EdgeColor = [0.5 0.5 0.5]; set(gca,'Xlim',[0 255]) grid on
% Executes on button press in radiobutton3.
function radiobutton3_Callback(hObject, eventdata, handles) % hObject handle to radiobutton3 (see GCBO)
% eventdata reserved to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton3 set(handles.radiobutton1,'Value',0)
set(handles.radiobutton2,'Value',0) set(handles.radiobutton3,'Value',1)
Img = handles.Img; Gray = rgb2gray(Img);
bw = im2bw(Gray,graythresh(Gray));
axes(handles.axes1) cla('reset')
imshow(bw)
axes(handles.axes2)
h = histogram(double(bw(:)),2); h.FaceColor = [0 0 0];
h.EdgeColor = [0 0 0]; set(gca,'Xlim',[0 1]) grid on
% Image complement bw_Comp = ~bw;
axes(handles.axes3) cla('reset')
imshow(bw_Comp)
axes(handles.axes4)