Method and system for biometric recognition using unique internal distinguishing characteristics
First Claim
1. A non-invasive method of recognizing the identity of a human or animal by recognizing non-visible internal tissue having a substantially stable unique distinguishing characteristic comprising the following steps:
- a) generating an electrical oscillating signal;
b) converting said electrical oscillating signal of step (a) to an acoustic energy beam, said acoustic energy beam having at least one frequency in the range between 100 KHz and 10 MHz;
c) transmitting said acoustic energy beam through an external accessible surface to said non-visible internal tissue;
d) receiving an emitted acoustic energy beam from said non-visible internal tissue, said emitted acoustic energy beam responsive to said transmitted acoustic energy beam;
e) converting said emitted acoustic energy beam to an emitted electrical signal;
f) forming a current representative pattern of said non-visible internal tissue having said substantially stable unique distinguishing characteristic in response to said emitted electrical signal, said forming of said current representative pattern comprising;
(i) generating at least one amplitude versus time plot, wherein the amplitude and interpeak distance of an echo peak is in response to said emitted electrical signal;
(ii) determining a minimum threshold amplitude value parallel to an x-axis and normal to a y-axis of said plot, thereby dividing said plot into selecting and eliminating areas;
(iii) calculating at least one ratio of said peaks in the selecting area to provide a representative pattern; and
g) comparing a previously produced and stored master representative pattern of said non-visible internal tissue with said current representative pattern of same.
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Abstract
The present invention is a biometric recognition method and system for identifying humans and animals with acoustic scanning techniques. The invention is based upon transmitting acoustic energy through an external accessible surface to non-visible internal tissue having a unique distinguishing characteristic. A master representative pattern of the unique distinguishing characteristic is produced by the interaction of an acoustic energy beam with discontinuities and inhomogeneities within the non-visible internal tissue. The master representative pattern is used for reference and compared to a current representative pattern formed upon each attempted reentry into the system.
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Citations
47 Claims
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1. A non-invasive method of recognizing the identity of a human or animal by recognizing non-visible internal tissue having a substantially stable unique distinguishing characteristic comprising the following steps:
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a) generating an electrical oscillating signal;
b) converting said electrical oscillating signal of step (a) to an acoustic energy beam, said acoustic energy beam having at least one frequency in the range between 100 KHz and 10 MHz;
c) transmitting said acoustic energy beam through an external accessible surface to said non-visible internal tissue;
d) receiving an emitted acoustic energy beam from said non-visible internal tissue, said emitted acoustic energy beam responsive to said transmitted acoustic energy beam;
e) converting said emitted acoustic energy beam to an emitted electrical signal;
f) forming a current representative pattern of said non-visible internal tissue having said substantially stable unique distinguishing characteristic in response to said emitted electrical signal, said forming of said current representative pattern comprising;
(i) generating at least one amplitude versus time plot, wherein the amplitude and interpeak distance of an echo peak is in response to said emitted electrical signal;
(ii) determining a minimum threshold amplitude value parallel to an x-axis and normal to a y-axis of said plot, thereby dividing said plot into selecting and eliminating areas;
(iii) calculating at least one ratio of said peaks in the selecting area to provide a representative pattern; and
g) comparing a previously produced and stored master representative pattern of said non-visible internal tissue with said current representative pattern of same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 44, 45, 46, 47)
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20. A non-invasive method of verifying the identity of a human or animal by recognizing non-visible internal tissue having a substantially stable unique distinguishing characteristic comprising the following steps:
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a) producing a master representative pattern of said non-visible internal tissue having said substantially stable unique distinguishing characteristic;
b) storing in at least one memory storage system said master representative pattern of said non-visible internal tissue;
c) generating an electrical oscillating signal;
d) sending signal of step (c) to at least one transmitting transducer wherein said signal is converted to an acoustic energy beam;
e) transmitting said acoustic energy beam from said transmitting transducer through an external accessible surface to said non-visible internal tissue wherein said transmitting acoustic energy beam before being emitted is altered by interaction with discontinuities and inhomogeneities within said non-visible internal tissue;
f) receiving said emitted acoustic energy beam from said non-visible internal tissue with at least one receiving transducer wherein said emitted acoustic energy beam is converted to an emitted electrical signal;
g) forming a current representative pattern of said non-visible internal tissue having said unique distinguishing characteristic in response to said emitted electrical signal, said forming of said current representative pattern comprising;
(i) generating at least one amplitude versus time plot, wherein the amplitude of an echo peak is in response to said emitted electrical signal;
(ii) determining a minimum threshold amplitude value parallel to the x-axis and normal to the y-axis of said plot, thereby dividing said plot into selecting and eliminating areas; and
(iii) eliminating said echo peaks below said minimum threshold amplitude value, leaving only selected echo peaks; and
h) comparing said stored master representative pattern of said non-visible internal tissue with said current representative pattern of same.
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21. A system for verifying the identity of a human or animal by recognizing non-visible internal tissue having a substantially stable unique distinguishing characteristic comprising the following steps:
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a) a means for generating an electrical oscillating signal;
b) at least one transmitting transducer connected to element (a) for converting said electrical oscillating signal to an acoustic energy beam thereby transmitting said acoustic energy beam through an external accessible surface to said non-visible internal tissue wherein said transmitting acoustic energy beam is altered by interaction with discontinuities and inhomogeneities within said non-visible internal tissue before being emitted;
c) at least one receiving transducer for converting said emitted acoustic energy beam from said non-visible internal tissue to an emitted electrical signal;
d) a means for forming a current representative pattern, wherein said emitted electrical signal received from element (c) is transformed into a current representative pattern of said substantially stable unique distinguishing characteristic, said forming of said current representative pattern comprising;
(i) generating at least one amplitude versus time plot, wherein the amplitude of an echo peak is in response to said emitted electrical signal;
(ii) determining a minimum threshold amplitude value parallel to the x-axis and normal the y-axis of said plot, thereby dividing said plot into selecting and eliminating areas; and
(iii) eliminating said echo peaks below said minimum threshold amplitude value, leaving only selected echo peaks; and
e) a means for comparing connected to element (d), wherein said current representative pattern is compared with a previously produced and stored master representative pattern of same. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 42, 43)
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Specification