Fiberio. Fiberio. A Touchscreen that Senses Fingerprints. A Touchscreen that Senses Fingerprints

Transcription

1 Fiberio A Touchscreen that Senses Fingerprints Christian Holz Patrick Baudisch Hasso Plattner Institute Fiberio A Touchscreen that Senses Fingerprints

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4 related work user identification on multitouch systems

5 1998: The Vision [Sugiura & Koseki, UIST 98] fingerprint user s identity, functionality

6 DiamondTouch [Dietz & Leigh, UIST 01] 1. the first integrated system distinguish users

7 Medusa...without the seats [Annett et al., UIST 11]

8 SurfaceFusion 2. true identification using tokens [Olwal & Wilson, CHI 08]

9 IR Ring still a token, but sensed by the table itself [Roth et al., UIST 10]

10 HandsDown 3. biometric features [Schmidt et al., NordiCHI 10]

11 BootStrapper pseudo-biometric: recognize clothing [Richter et al., CHI 12]

12 Carpus features on the back of the hand [Ramakers et al., UIST 12]

13 [Holz & Baudisch, CHI 10] Ridgepad fingerprint 3D finger pose touch accuracy

14 proposed functionality 1. different functions per finger 2. personalize interaction 3. log user activity 4. high-accuracy touch 5. authenticated access to private data

15 the challenge

16 challenge 1 output project images 2 input capture fingerprints

17 challenge 1 output project images 2 input capture fingerprints...integrated into the same space?

18 1project images diffuse surface

19 2capture fingerprints specular surface

20 2 capture fingerprints on traditional fingerprint scanners camera light source

21 2 fingerprint ridge capture fingerprints air glass

22 2 fingerprint ridge capture fingerprints appears bright

23 2 fingerprint ridge capture fingerprints skin appears bright glass

24 2 fingerprint ridge capture fingerprints appears bright appears dark

25 2 capture fingerprints fingerprint scanner := (1) high resolution (of course) (2) generate contrast between ridges and valleys

26 challenge 1 output project images 2 input capture fingerprints...integrated into the same space?

27 Fiberio

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32 fiber optic plate

33 fiber optic plate

34 fiber optic plate

35 40,000,000 fibers (3mm long) 4333 dpi off-the-shelf

36 role of the fiber plate (1) project images: diffuse transmission (2) capture fingerprints: specular reflection

37 1project images

38 1project images

39 1ring diffusion

40 1ring diffusion

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42 2 capture fingerprints fiber optic plate camera illuminant

43 specular reflection

44 specular reflection

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46 technical details placing the illuminant

47 placing the illuminant hotspot fiber plate camera illuminant

48 placing the illuminant camera illuminant

49 1 same location and tilted camera and illuminant

50 1same location

51 1same location

52 1same location light intensity and reflections high low

53 2homogenous illuminant fiber plate area illuminant

54 2homogenous illuminant

55 processing pipeline

56 raw image locate fingerprints augment & extract features match users

57 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

58 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

59 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

60 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

61 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

62 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

63 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

64 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

65 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users

66 query user #1 user #2 user #3 raw image locate fingerprints augment find orientations enhance ridges binarize mask extract features skeleton find minutiae match users [Bozorth 04]

67 christian holz fingerprint user

68 evaluation

69 30 fingers 10 participants 3 fingers 5 touches 150 trials

70 results 148 correct matches 0 wrong matches 2 no matches 21ms feature extraction 0.55ms matching per entry

71 conclusions

72 Fiberio

73 ...a diffused illumination table at heart

74 fiber optic plate

75 1998

76 2013

77 Fiberio

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79 Fiberio A Touchscreen that Senses Fingerprints Christian Holz Patrick Baudisch Hasso Plattner Institute Fiberio A Touchscreen that Senses Fingerprints