Biometry: Difference between revisions
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*good (e.g. low) far |
*good (e.g. low) far |
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*a low intensity light source is used to scan the vascular pattern |
*a low intensity light source is used to scan the vascular pattern |
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=Other techniques= |
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*voice verification |
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*signature verification |
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*vein pattern scanning |
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*scent |
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*keystroke patterns |
Revision as of 13:11, 15 February 2005
Overview
- Broad Overview on Biometric Criteria
- Facial recognition
- Use, Scenario, Features
- General course
- Approaches
- Summary
- Insights on Fingerprints
- Features
- Acquisition
- Recognition
- Demonstration
- Problems
Short Introduction
- I biometry: the statistical analysis of biological
observations and phenomena (Merriam-Webster Online Dictionary)
- I biometric: a measurable, physical characteristic or
personal behavioral trait used to recognize the identity, or verify the claimed identity of a person
- I Three levels:
- 1. I know something (passwords)
- 2. I have something (tokens)
- 3. I am something (biometry)
Classification
Two diffent modes must be distinguished:
- Identification “Who is it?”
- Authentication “Is it her?”
Quality indices
False Rejection Rate (frr)
- Rate of authentication attempts from legitimate users that are rejected.
False Acceptance Rate (far)
- Rate of authentication attemps from illegitimate users (e.g. attackers) that are accepted.
Equal Error Rate (eer)
- The eer equals the far and frr when the system is configured so that far = frr.
Failure to Enroll Rate (fer)
- Rate of users that can’t enroll into the system at all.
Hand geometry
- Hand is placed on a reflective surface
- Hand is lit by some light source (e.g. bright LED)
- a camera and some mirrors are used to gather images of several parts of the hand from several angles
- the template consists of measurements extracted from the image
Retina scanning
- was available before iris scanning
- good (e.g. low) far
- a low intensity light source is used to scan the vascular pattern
Other techniques
- voice verification
- signature verification
- vein pattern scanning
- scent
- keystroke patterns