CITRA DIGITAL

1. PRAKTEK 3 Citra DIGITAL
HISTOGRAM EQUALIZATION
Latihan 3.1
>> t=imread(‘d:gambar3.jpg’);
>> th=histeq(t);
>> imshow(t),figure,imshow(th)
Latihan 3.2
>> t = imread('d:gambar3.jpg');
>> th=histeq(t);
>> imshow(t),figure,imshow(th)
>> imhist(th), axis tight
Latihan 3.3
>> t=imread('d:gambar3.jpg');
>> td=imdivide(t,4);
>> te=histeq(td);
>> imshow(td),figure,imshow(td)
>> imhist(td),figure,imhist(te),axis tight
Latihan 3.4
>> x=uint8(10*magic(5))
170 240 10 80 150
230 50 70 140 160
40 60 130 200 220
100 120 190 210 30
110 180 250 20 90
Latihan 3.5
>> mean2(x(1:3,1:3))
ans =
111.1111
Latihan 3.5
>> mean2 (x(1:3,2:4))
ans =
108.8889

2. Fungsi
Imshow = untuk menampilkan image
Immultilply = perkalian
Imdivided() = pembagian
Imadd() = Penambahan
Latihan 3.6
>> a=ones(3,3)/9
a =
0.1111 0.1111 0.1111
0.1111 0.1111 0.1111
0.1111 0.1111 0.1111
Latihan 3.6
>> c=imread('d:gambar3.jpg');
>> f1=fspecial('average');
>> cf1=filter2(f1,c);
>> figure,imshow(c),figure,imshow(cf1/255)
>>
Latihan 3.7
Buka edit
clear all
clc
x=[0:10:180];
y1 = sin(x*pi/180);
y2 = cos(x*pi/180);
out = [ x' y1' y2']
simpan di c: latihanku/latih02
>> cd c:latihanku
>> latih02
LATIHAN 3.8
clear all;
clc;
disp( '------------------------------------');
disp( 'Program latihan 1');
disp(' -----------------------------------');
pjg = input ( 'Data panjang = ');
lbr = input (' Data lebar = ');
luas = pjg * lbr;

3. disp(['luas-> ' num2str(luas)]);