1. Small-Area Fingerprint Verification
曾子家

5. True match

7. False match

8. Outline 7 Moments MSER: Section 1. Minutiae matching Normalization
Enhancement
Binarization
Thinning
Minutiae extraction
Minutiae descriptor
Matching
Section 2. Local features matching
7 Moments
MSER:
Maximally Stable Extremal Regions

9. Minutiae matching Normalization Enhancement Binarization Thinning
Minutiae extraction
Minutiae descriptor
Matching
Minutiae matching
Fingerprint Verification System using Minutiae Extraction Technique (Kaur, 2008)

10. Normalization Histogram equalization add in fingerprint

11. Normalization Histogram equalization add in fingerprint

12. Enhancement

13. Binarization

14. Thinning
Fingerprint Reference Point Detection Based on High Curvature Points

15. Minutiae matching

16. Local features matching
7 Moments
MSER:
Maximally Stable Extremal Regions
Local features matching

17. 7 Moments

18. Introduce “Moments”
Definition: Weighted average (moment) of the image pixels' intensities
Usage: Describe objects after segmentation
Raw moment:
Centroid:
Centroid mement:
Digital Image Processing (3rd Edition) 3 by Rafael C. Gonzalez

19. Invariants
Translation
The nature of centroid moment
Scale
Rotation

20. http://limitless-thoughts. blogspot

21. http://limitless-thoughts. blogspot

22. http://limitless-thoughts. blogspot

23. Similar pattern, similar value?

24. Exp. Compare images
someone_0_ someone_0_10

25. 8 Splits
someone_0_ someone_0_10

29. Same image -> maskSize, characteristics

30. maskSize = 3

31. maskSize = 10

32. maskSize = 20

33. maskSize = 30

34. maskSize = 40

35. maskSize = 50

36. Summary
Insignificant results in every mask size.

37. MSER Maximally Stable Extremal Regions

43. Introduce “MSER”
Affine transformation-invariant
Scale-invariant

46. Normalization

47. Affine transforamtion
Ellipses to circular
Intensity normalization

50. Summary
Shortcomings
Can only detect few features
Not robust to blur

51. References
M. Dubey and S. Sahu, “Fingerprint Minutiae Extraction and Orientation Detection Using ROI (Region Of Interest) for Fingerprint Matching,” Orientation-Detection.html, 2017.
M. Kaur, et al., “Fingerprint Verification System using Minutiae Extraction Technique,” system-using-minutiae-extraction-technique, 2017.
Wikipedia, “Histogram Equalization,”

52. References
N. H. Barnouti, “Fingerprint Recognition Improvement Using Histogram Equalization and Compression Methods”,
J. –F. Mainguet, “Fingerprint Algorithms: Algorithmes de Reconnaissance d‘Empreintes Digitales,”
R. C. Gonzalez, Digital Image Processing, 3rd Edition, Pearson, London, England, 2007.

53. References
Limitless Thoughts, “Hu's Seven Moments Invariant (Matlab Code for invmoments.m),” seven-moments-invariant-matlab-code.html, 2017.
Yung-Yu Chuang, “Digital Visual Effect,”