Method and apparatus for asperity detection
First Claim
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1. A method, comprising:
- detecting, over time, at least one identifying asperity on an external surface to provide asperity information;
using the asperity information to determine topographical characterizing information for the external surface.
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Abstract
An asperity detection apparatus and method wherein asperities are detected over a period of time. The resultant information can be used to characterize the asperities as three dimensional structures and/or with respect to their elastic and/or resilient behaviors or properties over time.
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Citations
27 Claims
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1. A method, comprising:
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detecting, over time, at least one identifying asperity on an external surface to provide asperity information;
using the asperity information to determine topographical characterizing information for the external surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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detecting, over time, at least one identifying asperity on an external surface to provide temporally-based asperity information;
using the temporally-based asperity information to determine at least one of elasticity and resiliency characterizing information for the external surface. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An apparatus comprising:
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an identifying asperity detector;
a detector controller having a control output operably coupled to the identifying asperity detector;
a memory operably coupled to the identifying asperity detector and having a topographic representation stored therein of a surface that has an identifying asperity disposed therein, the topographic representation comprising a plurality of temporally-spaced asperity detection events for the identifying asperity. - View Dependent Claims (19, 20, 21, 22)
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23. A method of reading a fingerprint comprised of a plurality of characterizing friction ridges, comprising:
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providing a fingerprint reader surface;
as the fingerprint is moved with respect to the fingerprint reader surface, capturing a series of representations of the friction ridges that have at least a predetermined degree of proximity with the fingerprint reader surface at a time when the corresponding representation is captured;
using the series of representations to form a topographic characterization of the fingerprint. - View Dependent Claims (24, 25, 26, 27)
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Specification