gambar=imread(‘gambarkoe.jpg’); %--------membaca file gambar
red=gambar(:,:,1); %memanggil matriks gambar yang hanya berisi piksel warna merah
green=gambar(:,:,2);% memanggil matriks gambar yang hanya berisi pikselwarna merah
blue=gambar(:,:,3); %memanggil matriks gambar yang hanya berisi pikselwarna merah
merahgray2=0.3*red+0.5*green+0.2*blue ;
imhist(red)
imhist(green)
imhist(blue)
imhist(gray)
Rgb2gray Histogram
[nama_file1,nama_path1]=
uigetfile(... {’*.bmp;*.jpg
’,’File Citra
(*.bmp,*.jpg)’;
’*.bmp’,’ File Bitmap
(*.bmp)’; ... ’*.jpg’,’File jpeg (*.jpg)’; ’*.*’,’
Semua File (*.*)’},...
’Buka File Citra
Host/Asli’); if ˜isequal(nama_file1,0)
handles.citra1=imread
(fullfile(nama_path1,nama_file1));
x=rgb2gray(handles.citra1);
guidata(hObject,handles); hold on;
axes(handles.sb_citra_asli);
imshow(x); hold on;
axes(handles.sb_hist_asli);
imhist(x); else
return; end set(handles.text9,
’string’ ,nama_file1);
set(handles.text10,’string’ ,
size(handles.citra1,1));
set(handles.text12,’string’ ,
size(handles.citra1,2));
x=rgb2gray(handles.citra1);
handles.citra2=histeq(x);
guidata(hObject,handles);
hold on;
axes(handles.sb_citra_perataan);
imshow(handles.citra2); hold on;
axes(handles.sb_hist_perataan);
imhist(handles.citra2);
RGB Histogram
uigetfile(...
{’*.bmp;*.jpg’,’File Citra
(*.bmp,*.jpg)’;
’*.bmp’,’File Bitmap
(*.bmp)’; ... ’*.jpg’,’File
jpeg (*.jpg)’;
’*.*’,’Semua File (*.*)’},...
’Buka File Citra
Host/Asli’);
if ˜isequal(nama_file1, 0)
handles.citra1=
imread(fullfile
(nama_path1,nama_file1));
[x,map]=rgb2ind(handles.citra1,256);
guidata(hObject,handles);
hold on; axes(handles.sb_citra_asli);
imshow(handles.citra1);
R=handles.citra1(:,:,1);
hold on;
axes(handles.sb_hist_red);
imhist(R); G=handles.citra1(:,:,2);
hold on;
axes(handles.sb_hist_green);
imhist(G);
B=handles.citra1(:,:,3);
hold on; axes(handles.sb_hist_blue);
imhist(B);
else return; end
set(handles.text10,’string’,nama_file1);
set(handles.text12,’string’
,size(handles.citra1,1));
set(handles.text14,’string’
,size(handles.citra1,2));
