tugas 6 pengolahan citra

Nama : Ayunda Mugiarsih

Kelas : Line 1 TKJ

NPM : 17100024

Tugas 6

Gamabar hasil

Penjelasan

Cgreyscale adalah suatu citra yang hanya memiliki warna tingkat keabuan. penggunaan citra greyscale dikarenakan membutuhkan sedikit informasi yang diberikan pada tiap piksel dibandingkan dengan citra berwarna. 

Citra greyscale merupakan citra digital yang hanya memiliki satu nilai kenal pada setiap pikselnya, artinya nilai dari red = green = blue. Nilai-nilai tersebut digunakan untuk menunjukkan intensitas warna.

Citra yang ditampilkan dari citra jenis ini terdiri atas warna abu-abu, bervariasi pad warna hitam pada bagian yang intensitas terlemah dan warna putih pada intensitas terkuat. Citra Grayscale berbeda dengan citra “hitam-putih”, dimana pada konteks komputer, citra hitam putih terdiri hanya atas 2 warna saja yaitu "hitam" dan "putih" saja pada citra grayscale warna bervariasi antara hitam dan putih, tetapi variasi warna diantaranya sangat banyak. citra grayscale seringkali merupakan perhitungan dari intensitas cahaya pada setiap piksel pada spektrum elektromagnetik single band. 

Coding

function varargout = ayunda(varargin)

% AYUNDA MATLAB code for dhani.fig

%      AYUNDA, by itself, creates a new AYUNDA or raises the existing

%      singleton*.

%

%      H = AYUNDA returns the handle to a new DHANI or the handle to

%      the existing singleton*.

%

%      AYUNDA ('CALLBACK',hObject,eventData,handles,...) calls the local

%      function named CALLBACK in AYUNDA.M with the given input arguments.

%

%      AYUNDA ('Property','Value',...) creates a new AYUNDA or raises the

%      existing singleton*.  Starting from the left, property value pairs are

%      applied to the GUI before dhani_OpeningFcn gets called.  An

%      unrecognized property name or invalid value makes property application

%      stop.  All inputs are passed to dhani_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 dhani

% Last Modified by GUIDE v2.5 03-Mar-2020 09:57:55

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name',       mfilename, ...

'gui_Singleton',  gui_Singleton, ...

'gui_OpeningFcn', @dhani_OpeningFcn, ...

'gui_OutputFcn',  @dhani_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 dhani is made visible.

function ayunda_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 ayunda (see VARARGIN)

% Choose default command line output for ayunda

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes ayunda wait for user response (see UIRESUME)

% uiwait(handles.figure1);

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

function varargout = ayunda_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)

[name_file1,name_path1] = uigetfile( ...

    {'*.bmp;*.jpg;*.tif','File of type (*.bmp,*.jpg,*.tif)';

'*.bmp','File Bitmap (*.bmp)';...

'*.jpg','File Jpeg (*.jpg)';

'*.tif','File Tif (*.tif)';

'*.*','All Files (*.*)'},...

'Open Image');

if ~isequal(name_file1,0)

    handles.data1 = imread(fullfile(name_path1,name_file1));

    guidata(hObject,handles);

    axes(handles.axes1);

    imshow(handles.data1);

else

return;

end

% --- Executes on button press in pushbutton2.

function pushbutton2_Callback(hObject, eventdata, handles)

image1 = handles.data1;

gray =  rgb2gray(image1);

axes (handles.axes2);

imshow(gray);

handles.data2 = gray;

guidata(hObject,handles);

% --- Executes on slider movement.

function slider1_Callback(hObject, eventdata, handles)

gray = handles.data2;

value = get(handles.slider1,'value');

thresh = imcomplement(im2bw(gray,value/255));

axes(handles.axes2);

imshow(thresh);

handle.data3 = thresh;

guidata(hObject,handles);

set(handles.edit1,'String',value)

% --- Executes during object creation, after setting all properties.

function slider1_CreateFcn(hObject, eventdata, handles)

% hObject    handle to slider1 (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

    set(hObject,'BackgroundColor',[.9 .9 .9]);

end

% --- Executes on button press in pushbutton3.

function pushbutton3_Callback(hObject, eventdata, handles)

thresh = handles.data3;

[name_file_save,path_save] = uiputfile(...

    {'*.bmp','File Bitmap (*.bmp)';...

'*.jpg','File jpeg (*.jpg)';

'*.tif','File Tif (*.tif)';

'*.*','All Files (*.*)'},...

'Save Image');

if ~isequal(name_file_save,0)

    imwrite(thresh,fullfile(path_save,name_file_save));

else

return

end

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