Image Inpainting

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Image Inpainting
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EE465 Introduction to Digital Image Processing
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Geometric Transformation
Widely used in computer graphics to generate
special effects
MATLAB functions griddata, interp2, maketform,
imtransform
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EE465 Introduction to Digital Image Processing
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Basic Principle

• (x,y) ? (x,y) is a geometric transformation
• We are given pixel values at (x,y) and want to
  interpolate the unknown values at (x,y)
• Usually (x,y) are not integers and therefore we
  can use linear interpolation to guess their values

MATLAB implementation zinterp2(x,y,z,x,y,meth
od)
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EE465 Introduction to Digital Image Processing
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Rotation
y
y
x
?
x
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EE465 Introduction to Digital Image Processing
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MATLAB Example
zimread('cameraman.tif')
original coordinates x,ymeshgrid(1256,1256)

new coordinates a2 for i1256for
j1256 x1(i,j)ax(i,j) y1(i,jy(i,j)/a enden
d
Do the interpolation z1interp2(x,y,z,x1,y1,'cu
bic')
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Rotation Example
?3o
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Scale
a1/2
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EE465 Introduction to Digital Image Processing
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Affine Transform
parallelogram
square
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EE465 Introduction to Digital Image Processing
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Affine Transform Example
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EE465 Introduction to Digital Image Processing
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Shear
parallelogram
square
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Shear Example
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Projective Transform
B
B
A
A
C
C
D
D
quadrilateral
square
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Projective Transform Example
-4 2 -8 -3 -3 -5 6 3
0 0 1 0 1 1 0 1
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APLIKASI OPERASI GEOMETRI
Rotasi
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SUMMARY

• Operasi berbasis bingkai / frame adalah operasi
  yang melibatkan 2 buah citra atau lebih dan
  menghasilkan sebuah citra keluaran yang merupakan
  hasil operasi matematis ( operasi aritmatik dan
  operasi logika )

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SUMMARY

• Contoh implementasi operasi berbasis bingkai
  antara lain image blending, dan deteksi gerak.
• Operasi Geometrik berhubungan dengan perubahan
  bentuk geometrik citra, yaitu ukuran ataupun
  orientasinya.

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TUGAS

• Buat Program aplikasi pengolahan citra digital
  untuk operasi aritmatik / geometri

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REFERENSI

1. Rafael C. Gonzales dan Richard E. Woods, Digital
   Image Processing, Edisi 2, Prentice Hall, 2002
2. Rafael C. Gonzales, Richard E. Woods dan Steven
   L. Eddins, Digital Image Processing using
   Mathlab, Prentice Hall, 2003
3. Achmad Balza, Firdausy Kartika. Teknik Pengolahan
   Citra Digital dengan Delphi. Ardi
   Publishing.Yogyakarta.2005.