Claims
- 1. A method of processing an unknown physical fingerprint comprising:
- i) obtaining an unknown fingerprint image that includes images of ridges in said unknown physical fingerprint;
- ii) binarizing said images of ridges in said unknown fingerprint image to produce a binarized image of said ridges;
- iii) generating an image with fused ridges by expanding said images of ridges in said binarized image of said unknown fingerprint;
- iv) shrinking said image with fused ridges to create a scaled-down image; and
- v) masking a first portion of said unknown fingerprint image with said scaled-down image so as to create a modified image of said unknown fingerprint.
- 2. A method of processing an unknown fingerprint image as defined in claim 1, wherein said shrinking includes:
- i) determining a diameter of said unknown fingerprint image and a diameter of said fused image;
- ii) comparing said diameter of said unknown fingerprint image and said diameter of said fused image; and
- iii) continuing to shrink said fused image until a predetermined relationship between diameter of said fused image and said diameter of said unknown finger image is reached.
- 3. A method of processing an unknown fingerprint image as defined in claim 1, further comprising:
- i) extracting a second portion of said unknown fingerprint image that was not covered by said scaled-down image during said set of masking a first portion of said unknown fingerprint image.
- 4. A method of processing an unknown fingerprint image as defined in claim 3, wherein said second portion of said unknown fingerprint image corresponds to peripheral edge portion of said unknown fingerprint image.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3-190590 |
Jul 1991 |
JPX |
|
3-190592 |
Jul 1991 |
JPX |
|
Parent Case Info
This is a continuation of application No. 07/906,847, filed on Jun. 30, 1992, now abandoned, which was abandoned upon the filing hereof.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0173972 |
Mar 1986 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
906847 |
Jun 1992 |
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