1. A study about Digital Image Stabilizer
指導教授 :
學生 :
日期 :
台北科技大學資工所
楊士萱
鄭馥銘
7/29
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最近更新日期: 2017年4月17日星期一

2. Outline Introduction of Digital Image Stabilizer (DIS)
Block Diagram Of Mpeg Encoder
Motion Estimation (ME)
Future Work

3. Introduction Of DIS
Hand-Movement 2.
Zooming
Moving Objects
Panning

4. Introduction Of DIS
One can Extract the components of frame changes quantitatively into three factors :
1. Motion of object
Panning of camera
3. Zooming of camera

5. Block Diagram Of MPEG _ + Frame Memory Quantizer (Q) VLC Encoder DCT
Pre-Processing
Q-1
Buffer
Input
IDCT
Output +
Motion Compensation
Frame Memory
Motion Estimation

6. I frame coding _ + Frame Memory Quantizer (Q) VLC Encoder DCT Q-1
Pre-Processing
Q-1
Buffer
Input
IDCT
Output +
Motion Compensation
Frame Memory
Motion Estimation

7. P frame coding _ + Frame Memory Quantizer (Q) VLC Encoder DCT Q-1
Pre-Processing
Q-1
Buffer
Input
IDCT
Output +
Motion Compensation
Frame Memory
Motion Estimation

8. Block Diagram Of DIS(1) _ + Frame Memory Quantizer (Q) VLC Encoder DCT
Pre-Processing
Q-1
Buffer
Input
IDCT
Output +
Motion Compensation
Frame Memory
Motion Estimation

9. Block Diagram Of DIS(2) Motion Compensation Digital Image Stabilizer
Pre-frame Information
Cur-frame Information
Digital Image Stabilizer
Motion Estimation

10. Motion Estimation Current Frame Past Frame MV : Motion Vector (u,v) -7
(x+u,y+v)
(x,y) MV
(x,y) 7
MV : Motion Vector (u,v)

11. Three –Step Search -7 7 -7 7

12. Three –Step Search -7 7 -7 7

13. Three –Step Search -7 7 -7 7

14. Three –Step Search Number of check-points : Best Case : 25
Worst Case : 25

15. New Three –Step Search -7 7 -7 7

16. New Three –Step Search -7 7 -7 7

17. New Three –Step Search -7 7 -7 7

18. New Three –Step Search -7 7 -7 7

19. New Three –Step Search Number of check-points : Best Case : 17
Worst Case : 33

20. Efficient Three –Step Search-7 7 -7 7

21. Efficient Three –Step Search-7 7 -7 7

22. Efficient Three –Step Search-7 7 -7 7

23. Efficient Three –Step Search
Number of check-points :
Best Case : 13
Worst Case : 29

24. Four –Step Search -7 7 -7 7

25. Four –Step Search -7 7 -7 7

26. Four –Step Search -7 7 -7 7

27. Four –Step Search -7 7 -7 7

28. Four –Step Search -7 7 -7 7

29. Four –Step Search -7 7 -7 7

30. Four –Step Search Number of check-points : Best Case : 17
Worst Case : 27

31. Block-Base Gradient Descent Search-7 7 -7 7

32. Block-Base Gradient Descent Search-7 7 -7 7

33. Block-Base Gradient Descent Search-7 7 -7 7

34. Block-Base Gradient Descent Search-7 7 -7 7

35. Diamond Search -7 7 -7 7

36. Diamond Search -7 7 -7 7

37. Diamond Search -7 7 -7 7

38. Diamond Search -7 7 -7 7

39. Diamond Search -7 7 -7 7

40. Diamond Search -7 7 -7 7

41. Performance comparisons for “Coastguard”
Simulation Result
Performance comparisons for “Coastguard”
BMA
Window size = 7
Window size = 15
MSE
SearchP FS
79.87
225.00
76.07
961.00
3SS
89.33
25.00
95.69
33.00
4SS
90.83
19.81
89.05
28.25
N3SS
85.15
21.56
99.17
21.38 DS
88.45
17.80
86.48
17.89
E3SS
85.06
18.63
84.66
18.88

42. Performance comparisons for “Football”
Simulation Result
Performance comparisons for “Football”
BMA
Window size = 7
Window size = 15
MSE
SearchP FS
257.83
225.00
145.06
961.00
3SS
276.22
25.00
186.04
33.00
4SS
289.72
20.56
193.54
29.80
N3SS
276.70
23.81
192.82
25.68 DS
289.30
20.72
217.97
22.75
E3SS
275.59
20.29
182.47
22.63

43. Performance comparisons for “Susie”
Simulation Result
Performance comparisons for “Susie”
BMA
Window size = 7
Window size = 15
MSE
SearchP FS
11.89
225.00
11.82
961.00
3SS
12.52
25.00
12.71
33.00
4SS
21.29
17.37
12.37
25.51
N3SS
11.93
17.96
12.00
17.92 DS
12.05
13.65
12.03
E3SS
12.07
13.95
12.08
13.91

44. Performance comparisons for “Salesman”
Simulation Result
Performance comparisons for “Salesman”
BMA
Window size = 7
Window size = 15
MSE
SearchP FS
18.82
225.00
18.79
961.00
3SS
19.70
25.00
19.96
33.00
4SS
19.45
17.40
19.69
25.49
N3SS
18.94
18.19
19.25
18.15 DS
19.41
13.85
E3SS
18.95
14.23
19.00

45. Future work
1. Try to find the Motion Estimation Algorithm Batter than the above- mentioned.
2. I will read some paper about DIS and implement it. Furthermore ,I will do as best as I can to get some good idea or propose method form the paper.
3. I will build up my testing-work system