hand biometrics
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Hand Biometrics Measurement and biometric technologies for identification and security applications. Objectives. 2. Hand Biometrics. Learn about biometrics technology Learn about engineering product planning and design Learn about meeting the needs of society - PowerPoint PPT PresentationTRANSCRIPT
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Hand Biometrics Measurement and biometric
technologies for identification and security applications
+Hand Biometrics
Learn about biometrics technology
Learn about engineering product planning and design
Learn about meeting the needs of society
Learn about teamwork and working in groups
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Objectives
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+Hand Biometrics
Measurement of a physical characteristic Examples include:
Fingerprints DNA Retinal pattern Hand dimensions
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What is a biometric?
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+Hand Biometrics
Universality – each person should have the characteristic.
Uniqueness – how well a biometric separates individuals from others.
Permanence – how well a biometric resists aging, variance over time.
Collectability – ease of acquisition, measurement.
Performance – accuracy, speed, and robustness of technology used.
Acceptability – degree of approval of a technology.
Circumvention – ease of use of a substitute.
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Properties of a biometric
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+Hand Biometrics
Biometrics are used to match an unknown sample to a database of known samples Criminal investigations
Biometrics are used to authenticate identities Fingerprint computer login
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Why use a biometric?
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+Hand Biometrics
Create a database of 4 known samples from measurements of your hands
Develop a rule or algorithm by which you can: …accept an unknown sample and
match it to an entry in your database; or
…reject the unknown sample as not appearing in the database at all
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Your Turn
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+Hand Biometrics
Work in groups of 4 Each person gets their hand measured 2
times You measure your own right hand Another teammate measures
your right hand 1 “Testing” sample,
1 “Database” sample DO NOT SWAP FORMS!
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Procedure – Part 1
Testing SampleA___B___C___D___
Testing SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
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+Hand Biometrics
Measuring a hand
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Measurement A:Distance from index fingertip to bottom knuckle
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+Hand Biometrics
Measuring a hand
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Measurement B:Width of ring finger, measured across the top knuckle
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+Hand Biometrics
Measuring a hand
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Measurement C:Width of palm across 4 bottom knuckles
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+Hand Biometrics
Measuring a hand
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Measurement D:Width of palm from middle knuckle of thumb across hand
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A
B
C
D
Measurement A:Distance from index fingertip to bottom knuckle
Measurement B:Width of ring
finger, measured across the top
knuckle
Measurement C:Width of palm
across 4 bottom knuckles
Measurement D:Width of palm from middle knuckle of thumb across hand
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+Hand Biometrics
Set aside all 4 white “Testing” forms Looking at just the 4 pink Database samples, develop a
mathematical and/or logical rule that can be used to match an unknown sample to an entry in the “Database”
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Procedure – Part 2
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
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+Hand Biometrics
Let Sn=An+Bn+Cn+Dn
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Example Rule
S3 = 20.5cm
S4 = 24.9cm
S2 = 25.3cm
S1 = 22.1cm
Testing SampleA___B___C___D___
Testing SampleA___B___C___D___
S = 24.7cm
Compute Sn for each entry in “Database”
Compute S for unknown test sample
Choose Database sample with least error < 0.5 cm,Else state “No Match”Error = 0.2cm
MATCH
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
Database SampleA___B___C___D___
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+Hand Biometrics
Combine “Testing” samples for entire table (8 samples)
Mix and shuffle “Testing” samples Each group picks 2 random Testing samples For each sample, use your RULE to determine
if there is a match in your “Database” and, if yes, which entry matches
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Procedure – Part 3
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+Hand Biometrics
Fill in worksheet
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Procedure – Part 3
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