Chapter 3 Image Enhancement in the Spatial Domain R. C. Gonzalez & R. E. Woods

Transkript

1 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

2 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

3 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

4 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

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6 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

7 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

8 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

9 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

10 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

11 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

12 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

13 Bit Slicing (Dilimleme) Pikseller, bitlerden meydana gelen sayılardır. Bir görüntüyü tanımlarken parlaklık aralığını tari etmektense, görüntüyü oluşturmaya katkı sağlayan bitleri ön plana çıkararak belirtmek mümkündür R. C. Gonzalez & R. E. Woods

14 Bit Slicing (Dilimleme)

15 Bit Slicing (Dilimleme)

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17 Bit Slicing (Dilimleme)

18 Bit Slicing (Dilimleme)

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29 3. Bölüm Uzaysal Domende İmge Zenginleştirme 2002 R. C. Gonzalez & R. E. Woods

30 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

31 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

32 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

33 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

34 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

35 Yerel zenginleştirme yönteminin bir özeti aşağıdaki gibidir : (,y) koordinatlarındaki bir pikselin değeri (,y) ise bu pikselin zenginleştirildikten sonraki yeni değeri g(,y) şöyle verilebilir: Eğer msy k0 OK VE k1sk σsy k2 SK ise ; g (,y) = E (,y) Diğer durumlarda ise ; g (,y) = (,y) 2002 R. C. Gonzalez & R. E. Woods

36 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

37 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

38 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

39 The logic operations AND, OR, and NOT orm a complete set, meaning that any other logic operation (XOR; NOR, NAND) can be created by a combination o these basic elements. They operate in a bit-wise ashion on piel data. EXAMPLE: We are perorming a logic AND on two images. Two corresponding piel values are in one image and 8810 in the second image. A= = B= 8810 = AND R. C. Gonzalez & R. E. Woods

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43 = I 1 = I 2 = = I 3

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50 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

51 İmge Ortalaması (,y) imgesine η(,y) gürültüsü eklendiğinde oluşan imgenin g (,y) olduğunu düşünelim. g (,y) = (,y) + η(,y) = = K i i y g K y g 1 ), ( 1 ), ( { } ), ( ), ( y y g E = 2 ), ( 2 ), ( 1 y y g K η σ σ = ), ( ), ( 1 y y g K η σ σ =

52 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

53 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

54 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

55 R = w z1 + w2 z w mn z mn = mn w i z R = w1 r + w r w r i = 1 i = 1 i = 9 1 w i r i 2002 R. C. Gonzalez & R. E. Woods

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59 Chapter 3 Image Enhancement in the Spatial Domain 2002 R. C. Gonzalez & R. E. Woods

60 Piksel değerleri: (10, 20, 20, 20, 15, 20, 20, 25, 100) ise Sıralanınca : (10, 15, 20, 20, 20, 20, 20, 25, 100) olur. Tam ortadaki yani 5. değer olan 20 merkezdeki piksele atanır R. C. Gonzalez & R. E. Woods

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63 Tek boyutlu () onksiyonunun birinci dereceden türevinin tanımı ark tır. Yani: ) ( 1) ( + = İkinci dereceden türev yine ark olarak tanımlanır: ) ( 2 1) ( 1) ( =

64 Eğer Laplace maskesinin merkez katsayısı negati ise Eğer Laplace maskesinin merkez katsayısı poziti ise y y + = ), ( 2 ) 1, ( ) 1, ( 2 2 y y y + + = ), ( 2 1), ( 1), ( 2 2 y y y y + + = [ ] ), ( 4 1), ( 1), ( ) 1, ( ) 1, ( 2 y y y y y = + = ), ( ), ( ), ( ), ( ), ( 2 2 y y y y y g

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67 Sadeleştirmeler: [ ] ), ( 4 1), ( 1), ( ) 1, ( ) 1, ( ), ( ), ( y y y y y y y g = [ ] 1), ( 1), ( ) 1, ( ) 1, ( ), ( = y y y y y

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