Pola Warna


Segmentasi warna merupakan salah satu metode segmentasi citra yang memisahkan antara objek dengan background berdasarkan ciri warna tertentu dari objek tersebut.

Proses segmentasi warna diawali dengan mengkonversi ruang warna citra yang semula RGB (Red, Green, Blue) menjadi ruang warna HSV (Hue, Saturation, Value).

Komponen Hue merupakan komponen yang merepresentasikan warna dari berbagai panjang gelombang cahaya.

Komponen Hue dari ruang warna HSV kemudian diekstrak dan dibagi-bagi menjadi beberapa daerah warna seperti ditunjukkan pada gambar berikut ini:
Untitled8

Contoh tampilan program segmentasi warna ditunjukkan pada gambar berikut:
Untitled

Untitled2

Gambar di atas merupakan hasil segmentasi warna citra untuk deteksi Band Neutrophil pada sampel darah.

Source code proses segmentasi warna

function varargout = Segmentasi_Warna_2(varargin)
% SEGMENTASI_WARNA_2 MATLAB code for Segmentasi_Warna_2.fig
%      SEGMENTASI_WARNA_2, by itself, creates a new SEGMENTASI_WARNA_2 or raises the existing
%      singleton*.
%
%      H = SEGMENTASI_WARNA_2 returns the handle to a new SEGMENTASI_WARNA_2 or the handle to
%      the existing singleton*.
%
%      SEGMENTASI_WARNA_2('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in SEGMENTASI_WARNA_2.M with the given input arguments.
%
%      SEGMENTASI_WARNA_2('Property','Value',...) creates a new SEGMENTASI_WARNA_2 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before Segmentasi_Warna_2_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to Segmentasi_Warna_2_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 Segmentasi_Warna_2

% Last Modified by GUIDE v2.5 22-Jun-2014 16:01:09

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @Segmentasi_Warna_2_OpeningFcn, ...
                   'gui_OutputFcn',  @Segmentasi_Warna_2_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 Segmentasi_Warna_2 is made visible.
function Segmentasi_Warna_2_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 Segmentasi_Warna_2 (see VARARGIN)

% Choose default command line output for Segmentasi_Warna_2
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);
movegui(hObject,'center');

% UIWAIT makes Segmentasi_Warna_2 wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = Segmentasi_Warna_2_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)
global IA DeviceID Format CAM
IAHI = imaqhwinfo;
IA = (IAHI.InstalledAdaptors);
D = menu('Select Video Input Device:',IA);
if isempty(IA)||D==0
   msgbox({'You don''t have any VideoInput Installed Adaptors!',...
           'OR',...
           'Please! try again and select Adaptor properly.'})
    return
end
IA = char(IA);
IA = IA(D,:);
IA(IA==' ')=[];
x = imaqhwinfo(IA);
try
DeviceID = menu('Select Device ID',x.DeviceIDs);
F = x.DeviceInfo(DeviceID).SupportedFormats;
nF = menu('Select FORMAT',F);
Format = F{nF};
catch
   warndlg({'Try Another Device or ID ';...
            'You Don''t Have Installed This Device (VideoInputDevice)'})
    return
end

try
VidObj = videoinput(IA, DeviceID, Format);
handles.VidObj = VidObj;
CAM = 1;
vidRes = get(handles.VidObj, 'VideoResolution');
nBands = get(handles.VidObj, 'NumberOfBands');
axes(handles.axes1)
hImage = image( zeros(vidRes(2), vidRes(1), nBands) );
preview(handles.VidObj, hImage)
set(VidObj,'returnedcolorspace','rgb');
catch E
    msgbox({'Configure The Cam Correctly!',' ',E.message},'CAM INFO')
end
guidata(hObject, handles);

set(handles.pushbutton3,'enable','on')
set(handles.pushbutton4,'enable','on')
set(handles.pushbutton5,'enable','on')
set(handles.pushbutton6,'enable','on')
set(handles.pushbutton7,'enable','on')
set(handles.pushbutton8,'enable','on')
set(handles.pushbutton9,'enable','on')
set(handles.pushbutton10,'enable','on')
set(handles.pushbutton11,'enable','on')
set(handles.pushbutton12,'enable','on')
set(handles.edit1,'enable','on')
set(handles.text1,'enable','on')

axes(handles.axes2)
cla reset
set(gca,'XTick',[])
set(gca,'YTick',[])

axes(handles.axes3)
cla reset
set(gca,'XTick',[])
set(gca,'YTick',[])

% --- 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)
[filename,pathname] = uigetfile({'*.jpg';'*.bmp';'*.png';'*.tif';'*.gif'});

if ~isequal(filename,0)
    Img = imread(fullfile(pathname,filename));
    axes(handles.axes1)
    imshow(Img)
    axes(handles.axes2)
    imshow(Img)
else
    return
end

handles.Img = Img;
guidata(hObject,handles)

set(handles.pushbutton3,'enable','off')
set(handles.pushbutton4,'enable','on')
set(handles.pushbutton5,'enable','on')
set(handles.pushbutton6,'enable','on')
set(handles.pushbutton7,'enable','on')
set(handles.pushbutton8,'enable','on')
set(handles.pushbutton9,'enable','on')
set(handles.pushbutton10,'enable','on')
set(handles.pushbutton11,'enable','on')
set(handles.pushbutton12,'enable','on')
set(handles.edit1,'enable','off')
set(handles.text1,'enable','off')

axes(handles.axes3)
cla reset
set(gca,'XTick',[])
set(gca,'YTick',[])

% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% 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)
VidObj = handles.VidObj;
Img = getsnapshot(VidObj);
axes(handles.axes2)
imshow(Img)

image_num = str2double(get(handles.edit1,'string'));
image_num = image_num + 1;
set(handles.edit1, 'string', image_num);
imwrite(Img,['MyImage_'  num2str(image_num) '.png'],'png')

handles.Img = Img;
guidata(hObject,handles)

% --- Executes on button press in pushbutton4.
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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==0/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==21/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton6.
function pushbutton6_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==43/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton5.
function pushbutton7_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==85/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton8.
function pushbutton8_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==128/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton9.
function pushbutton9_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==170/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton6.
function pushbutton10_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==191/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton9.
function pushbutton11_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==213/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

% --- Executes on button press in pushbutton12.
function pushbutton12_Callback(hObject, eventdata, handles)
% 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)
Img = handles.Img;
[tinggi,lebar,~] = size(Img);
hsv = rgb2hsv(Img);

H = hsv(:,:,1);
S = hsv(:,:,2);
V = hsv(:,:,3);

for y=1: tinggi
    for x=1: lebar
        h = H(y,x);
        
        % Ubah warna
        if h < 11/255       % merah
            h = 0;
        elseif h < 32/255   % jingga
            h = 21/255;
        elseif h < 54/255   % kuning
            h = 43/255;
        elseif h < 116/255  % hijau
            h = 85/255;
        elseif h < 141/255  % cyan
            h = 128/255;
        elseif h < 185/255  % biru
            h = 170/255;
        elseif h < 202/255  % ungu
            h = 191/255;
        elseif h < 223/255  % magenta
            h = 213/255;
        elseif h < 244/255  % merah muda
            h = 234/255;
        else
            h = 0;          % merah
        end
        
        % Ubah komponen H
        H(y,x) = h;
        
        % Ubah komponen S
        if S(y,x) >= 200/255
            S(y,x) = 255/255;
        elseif S(y,x) <= 20/255
            S(y,x) = 0;
        else
            S(y,x) = 128/255;
        end
        
        % Ubah komponen V
        if V(y,x) >= 200/255
            V(y,x) = 255/255;
        elseif V(y,x) <= 20/255
            V(y,x) = 0;
        else
            V(y,x) = 128/255;
        end
    end
end

H_aksen = H==234/255;
H_aksen = logical(H_aksen);

R = Img(:,:,1);
G = Img(:,:,2);
B = Img(:,:,3);

R(~H_aksen) = 255;
G(~H_aksen) = 255;
B(~H_aksen) = 255;

RGB = cat(3,R,G,B);

axes(handles.axes3)
imshow(RGB);

function edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (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 edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double


% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (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

Materi mengenai pengolahan citra digital untuk mendeteksi warna dan bentuk suatu objek dapat dilihat pada laman berikut: link

  1. salam kenal mas Adi pamungkas, ” saya mau melakukan penelitian terkait dengan dengan pengolahan citra, penelitian itu nantinya untuk menganalisa fitur yang paling baik akurasinya untuk mengenali suatu penyakit pada daun. fitur yang ingin saya pakai menggunakan fitur warna, tekstur dan bentuk.

    minta bantuanya mas Adi, terkait jurnal dan metode yang paling akurat

  2. Salam kenal juga mas muslim,
    untuk ciri warna, bisa menggunakan komponen hue yang berasal dari ruang warna hsv
    untuk ciri tekstur, bisa menggunakan metode GLCM (Gray Level Co-Occurence Matrix) atau bisa juga menggunakan metode filter gabor
    untuk ciri bentuk, bisa menggunakan parameter metric, eccentricity, compactness
    untuk ciri ukuran, bisa menggunakan parameter luas dan keliling
    Semoga bisa dijadikan sebagai gambaran penelitian

  3. terima kasih mas adi atas masukanya.
    mau tanya lagi mas adi.
    misalkan saya di ciri tektur menggunakan metode GLCM kemudian sudah didapatkan nilai contrast, correlation, energy,homogeneity nya. apakah dengan satu fitur itu sudah bisa digunakan untuk identifikasi objek? misalkan saya akan membandingkan akurasi tiap fitur tersebut. akurasi menggunakan contras dibandingakan dengan akurasi correlation dan seterusnya. terimakasih.

    • Pada umumnya dalam proses identifikasi menggunakan minimal dua fitur masukan,
      Misal ingin menguji fitur glcm yang terbaik, proses identifikasi bisa menggunakan salah satu fitur GLCM kemudian dipasangkan dengan salah satu fitur yang lain dari ciri warna, bentuk, atau ukuran

  4. terima kasih mas adi, mudah-mudahan bermanfaat ilmunya

  5. assalamualaikum bisa saya minta contact bbm atau Wa jenengan mz adi…..
    kalau boleh bisa kirim ke email : zainulhusnan027@gmail.com

    terimakasih ….

  6. assalamualaikum mz adi…untuk mencari pengukuran jarak dengan eucludian distance (dengan membandingkan dengan nilai acuan) mungkin ada soucodenya bang adi atau mungkin ada contohnya….

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: