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Direction-Oriented Interpolation
and
Its Application to De-interlacing
Part 2
Direction-Oriented Interpolation(DOI)
SangMyung Univ.
Do Young Park
A. Introduction to Deinterlacing(review)
B. Direction-Oriented Interpolation(DOI)
C. Experimental Results
2022-03-18 Deinterlacing Part 2 2
Contents
 A kind of Interpolation
 Interlace Video to Progressive Video
 NTSC
• ( Korean Broadcast Format : 29.97 frame/sec)
2022-03-18 Deinterlacing Part 2 3
Introduction to Deinterlacing
 Interlace Scan to Progressive Scan
2022-03-18 Deinterlacing Part 2 4
Introduction to Deinterlacing
 Various Deinterlacing Methods
• Line Doubling
• Line Averaging
2022-03-18 Deinterlacing Part 2 5
Introduction to Deinterlacing
Line Doubling
Line Averaging
 Various Deinterlacing Methods
• Edge Based Line Averaging(ELA)
• Enhanced ELA(EELA)
• Adaptive ELA(AELA)
2022-03-18 Deinterlacing Part 2 6
Introduction to Deinterlacing
X
255 255
255 255
??? ???
0
0
 Find Direction using Block Matching
2022-03-18 Deinterlacing Part 2 7
Direction-Oriented Interpolation
 Find Direction using Block Matching
2022-03-18 Deinterlacing Part 2 8
Direction-Oriented Interpolation
 Find Direction using Block Matching
2022-03-18 Deinterlacing Part 2 9
Direction-Oriented Interpolation
 Direction Vectors used in DOI
SR∝DV
2022-03-18 Deinterlacing Part 2 10
Direction-Oriented Interpolation
 Flow Diagram
2022-03-18 Deinterlacing Part 2 11
Direction-Oriented Interpolation
A
B
D
C
 Experimental Image
2022-03-18 Deinterlacing Part 2 12
Experimental Results
 Gold
Txtur1
Hotel
Cats
2022-03-18 Deinterlacing Part 2 13
Experimental Results
Finger
Café
Bike 
 Peak Signal to Noise Ratio(PSNR) Result
2022-03-18 Deinterlacing Part 2 14
Experimental Results
Image LA ELA DOI(Mat) DOI(C) DOI(Mat)-DOI(C)
Gold 33.8635 32.7333 33.8707 33.9614 -0.0907
Txtur1 22.4577 21.7321 22.4688 22.4052 0.0636
Hotel 32.8828 32.1452 33.2665 33.1713 0.0952
Cats 34.2119 31.1076 33.6548 34.0741 -0.4193
Finger 31.8108 28.8635 30.5311 31.8055 - 1.2744
Café 23.7583 22.8080 23.9795 23.7437 0.2358
Bike 27.7058 27.3841 28.4283 27.5166 0.9117
Average 29.5272 28.1105 29.4571 29.5254 -0.0068
 Original Image
2022-03-18 Deinterlacing Part 2 15
Experimental Results
 Zoomed Image
2022-03-18 Deinterlacing Part 2 16
Experimental Results
 Zoomed Image
2022-03-18 Deinterlacing Part 2 17
Experimental Results

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Deinterlacing_DOI part2

  • 1. Direction-Oriented Interpolation and Its Application to De-interlacing Part 2 Direction-Oriented Interpolation(DOI) SangMyung Univ. Do Young Park
  • 2. A. Introduction to Deinterlacing(review) B. Direction-Oriented Interpolation(DOI) C. Experimental Results 2022-03-18 Deinterlacing Part 2 2 Contents
  • 3.  A kind of Interpolation  Interlace Video to Progressive Video  NTSC • ( Korean Broadcast Format : 29.97 frame/sec) 2022-03-18 Deinterlacing Part 2 3 Introduction to Deinterlacing
  • 4.  Interlace Scan to Progressive Scan 2022-03-18 Deinterlacing Part 2 4 Introduction to Deinterlacing
  • 5.  Various Deinterlacing Methods • Line Doubling • Line Averaging 2022-03-18 Deinterlacing Part 2 5 Introduction to Deinterlacing Line Doubling Line Averaging
  • 6.  Various Deinterlacing Methods • Edge Based Line Averaging(ELA) • Enhanced ELA(EELA) • Adaptive ELA(AELA) 2022-03-18 Deinterlacing Part 2 6 Introduction to Deinterlacing X 255 255 255 255 ??? ??? 0 0
  • 7.  Find Direction using Block Matching 2022-03-18 Deinterlacing Part 2 7 Direction-Oriented Interpolation
  • 8.  Find Direction using Block Matching 2022-03-18 Deinterlacing Part 2 8 Direction-Oriented Interpolation
  • 9.  Find Direction using Block Matching 2022-03-18 Deinterlacing Part 2 9 Direction-Oriented Interpolation
  • 10.  Direction Vectors used in DOI SR∝DV 2022-03-18 Deinterlacing Part 2 10 Direction-Oriented Interpolation
  • 11.  Flow Diagram 2022-03-18 Deinterlacing Part 2 11 Direction-Oriented Interpolation A B D C
  • 12.  Experimental Image 2022-03-18 Deinterlacing Part 2 12 Experimental Results  Gold Txtur1 Hotel Cats
  • 13. 2022-03-18 Deinterlacing Part 2 13 Experimental Results Finger Café Bike 
  • 14.  Peak Signal to Noise Ratio(PSNR) Result 2022-03-18 Deinterlacing Part 2 14 Experimental Results Image LA ELA DOI(Mat) DOI(C) DOI(Mat)-DOI(C) Gold 33.8635 32.7333 33.8707 33.9614 -0.0907 Txtur1 22.4577 21.7321 22.4688 22.4052 0.0636 Hotel 32.8828 32.1452 33.2665 33.1713 0.0952 Cats 34.2119 31.1076 33.6548 34.0741 -0.4193 Finger 31.8108 28.8635 30.5311 31.8055 - 1.2744 Café 23.7583 22.8080 23.9795 23.7437 0.2358 Bike 27.7058 27.3841 28.4283 27.5166 0.9117 Average 29.5272 28.1105 29.4571 29.5254 -0.0068
  • 15.  Original Image 2022-03-18 Deinterlacing Part 2 15 Experimental Results
  • 16.  Zoomed Image 2022-03-18 Deinterlacing Part 2 16 Experimental Results
  • 17.  Zoomed Image 2022-03-18 Deinterlacing Part 2 17 Experimental Results

Editor's Notes

  1. 보간법의 한 종류로 인터레이스 스캔된 비디오를 프로그레시브 비디오로 보간해주는 과정을 디 인터레이싱이라고 하는데 이게 왜 이렇게 됬냐면 NTSC를 알아야됨 우리 인간이 인지하는 깜빡임 – 50프레임인데 예전 브라운관 에서는 데이터 전송이 요즘같지가않았어서 적은데이터로 비슷한효과 내려공 사실 요즘 디지털 방송할때도 여전히 사용함 더 좋은 화질 하려고 그래서 인터레이스가 뭐냐 , 프로그레시브는 뭐냐 하면 아래 그림 보시면 앞의 두장이 인터레이스 스캔된 방식 마지막것이 프로그레시브 방식인데 P와 I 로 구분 하고 두배 가량의 용량을 더 필요로 하는것은 딱 보면 아시게죵
  2. 앞에서 설명드린 인터레이스 스캔된 데이터들을 프로그레시브 스캔된 데이터 처럼 온전하게 빈 공간의 값을 예상하여 채워주는 것을 보간법의 일종인 디 인터레이싱이라고
  3. 이제 앞에서 설명드린 디 인터레이싱에대해 어떤 방법들이 있는지 설명할게요 우선 보간법을 함에 있어 가장 편한 방법인 영차 보간법과 1차 보간법인 선형 보간법이 있습니다. 라인 더블링과 라인 에버리징이라고 불리죠 하지만 이런 방법은 간단할지 모르나 디 인터레이싱의 특성 상 대각선 또는 수평 엣지부분에서 크게 이상하게 보이게 됩니다. 사진은 교수님 논문에서 나온 예제 영상인데요 라인 더블링을 이용해 디인터레이싱을 실행 하였을 떄의 결과입니다. 라인 에버리징도 크게 다를바가 없지요 바퀴살 부분이 깜빡깜빡하져? 이런 오류를 피하기 위해 주로 엣지의 방향성을 찾아 그 방향을 보존하는 방법을 사용하게 되었습니다.
  4. 가장 유명한 엣지 보존 방법은 ELA 라는 방법인데요. 45도 90도 135도 세 방향의 엣지를 찾아서 보간해주는 방법입니다. 하지만 이 방법은 새로운 시도를 하게 하는 시발점은 되었으나 성능은 LA에 비해 더 안좋아 질 때도 상당히 많았는데요 이 방법을 기반으로 EELA AELA 등의 여러 확장된 방법도 나왔을 뿐만 아니라 다른 방식으로 엣지의 방향을 찾는 방법도 수없이 많이 나왔습니다. 예를들어 ELA 방식은 이런 경우등에서 에지를 잘못 찾는 경우가 많습니다.
  5. SR을 돌아가며 – 논문에서는 16을 SR로 두었으나 여기서 표현하기에는 크기가 작아 대략 서치레인지를 6 정도로… 이런식으로 블록마다 원 블록과 비교를 하여 가장 작은 인덱스를 찾게 됨.
  6. 만약 이런식으로 인덱스가 나왔다면 ( =<
  7. 만약 이런식으로 인덱스가 나왔다면 곡선 이런것도 해줌 이런 방식을 이용해서 기존의
  8. 서치 레인지가 많아질 수록 더 많은 각도를 찾아낼 수 있음.
  9. 도영이오빠안뇽 여기있넴 ㅋ히히히히히