Individualized fingerprint scanner

• US 20010033677A1
• Filed: 01/16/2001
• Published: 10/25/2001
• Est. Priority Date: 04/28/1998
• Status: Active Grant

• Current Assignee: Cross Match Technologies Incorporated (Assa Abloy AB)
• Original Assignee: Cross Match Technologies Incorporated (Assa Abloy AB)
• Inventors: Scott, Walter G., Fedele, Dean J.
• Granted Patent: US 6,628,813 B2
• Time in Patent Office: Days
• US Class Current: 382/124
• CPC Class Codes: G06V 40/1335 Combining adjacent partial images (e.g. slices) to create a composite input or reference pattern; Tracking a sweeping finger movement

Abstract

A method and apparatus whereby a fingerprint verifier has a mechanism to slide a prism over an imaged area of a camera. The position of the prism being determined by a binary absolute linear code on a sliding mechanism imaged by the same camera at the side of the fingerprint wherein the images are knitted together to simulate a large CCD.

Claims

1. A process for electronically capturing the attributes of the image of a fingertip which comprises:

furnishing an optical platen having a transparent scanning area and adjacent indicia imprinted thereon;

providing an electro-optical device constructed and arranged so as to receive scanned data from said platen;

scanning the fingertip by rotational movement of said fingertip across the scanning area of said platen;

randomly recording segments of said scanned data during rotation of said fingertip, inclusive of the adjacent indicia;

archiving said randomly recorded segments when the quality thereof is of an acceptable level; and

knitting together an integrated image of said fingertip;

whereby the absolute positioning of said recorded segments relative to said platen is defined by viewing the adjacent indicia recorded therewith.

2. The process according to

claim 1

wherein the indicia is a bar code.

3. The process according to

claim 1

wherein the step of scanning comprises the step of acquiring a rolled print and output a knitted bitmap 3000 by 3200 pixels with resolution of 2000 dpi in 4196 shades of gray and reduced to 750 by 800 by 256.

4. The process according to

claim 1

wherein the step of scanning comprises the step of acquiring a flat print and output a bitmap 750 by 2000 pixels with resolution of 500 dpi and 4196 shades of gray and reduced to 256 shades of gray.

5. The process according to

claim 1

including the step of extracting and report quality of image to trigger acceptance set in config menu in INI.

6. The process according to

claim 1

including the step of matching and reporting quality of match to trigger acceptance set in config menu in INI. (DLL2)

7. A device for electronically capturing the attributes of the image of a fingertip which comprises:

an optical platen having a transparent scanning area and adjacent indicia imprinted thereon;

an electro-optical device constructed and arranged so as to receive scanned data from said platen;

means to randomly record the image of the fingertip generated by rotational movement of said fingertip across the scanning area of said platen;

means for archiving said randomly recorded segments when the quality thereof is of an acceptable level; and

means for knitting together an integrated image of said fingertip;

whereby the absolute positioning of said recorded segments relative to said platen is determined by viewing the adjacent indicia recorded therewith.

8. The device according to

claim 7

wherein said electro-optical device comprises a housing means;

a fingerprint reader means having a prism with a first side surface exposed through a surface of said housing means with a second side surface of said prism positioned in said housing;

a plurality of aspheric lens optically coupled to said prism for collimating a fingerprint image;

camera means for capturing the fingerprint image focused through said aspheric lens; and

a microprocessor means for encoding the fingerprint image captured by said camera means.

9. The device according to

claim 8

wherein said housing means further includes a manually movable platen wherein the moves the platen past the scanner.

10. A process for creating a fingerprint record for incorporation in an automated fingerprint identification system comprising:

individually rolling the fingers of each hand across a scanning area having adjacent indicia imprinted thereon;

upon receiving an appropriate signal, placing four fingers of each hand on said scanning device whereby verification of the order of said individual fingers is verified; and

upon completion of the verification process, archiving the data collected to said automated fingerprint identification system.