Prices for fingerprint scanners start at around 20 and can reach up to 100 or more for a single unit. If you’re in the market for several fingerprint scanners, such as for an office, search for companies selling multiple unit bundles, because you can save money purchasing scanners MFS100 OPTICAL FINGERPRINT SENSOR - STQC certified single finger scanner MFS100 is high quality USB fingerprint sensor for fingerprint authentication in desktop or network security. The FM220U fingerprint scanner has been successfully tested and deployed in remote corners of India, and it has proven to work in dusty and harsh conditions. Shock-proof to prevent any damage caused by accidents, the FM220U is also protected against dust and water ingress. Its ergonomic design guides the finger to the optimal position for.
It uses the name of the two persons and.About STQC - Standardisation Testing and Quality Certification (STQC) Directorate is an attached office of the Department of Electronics and Information Technology, Government of India. Apart from STQC, MFS100 is CE, FCC, RoHS, WHQL, CB 60950 approved. Equivalent to FBI PIV certification. Leaders in providing Total HR Solution and Turnkey System. Export and linking to.MFS100 is brand of Mantra softech - STQC, GOVT.
Fingerprint Scanner Test Verification Functions That
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US10/690,641 Other versions US20040156555A1( en Inventor Richard D. US7010148B2 - Calibration and correction in a fingerprint scanner- Google Patents US7010148B2 - Calibration and correction in a fingerprint scanner- Google Patents Calibration and correction in a fingerprint scannerDownload PDF Info Publication number US7010148B2 US7010148B2 US10/690,641 US69064103A US7010148B2 US 7010148 B2 US7010148 B2 US 7010148B2 US 69064103 A US69064103 A US 69064103A US 7010148 B2 US7010148 B2 US 7010148B2 Authority US United States Prior art keywords gray level value test information calibration focus Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. MFS100 can be used for authentication, identification and verification functions that let your fingerprint act like digital passwords that cannot be lost, forgotten or stolen.
Assigned to CROSS MATCH TECHNOLOGIES, INC., CROSS MATCH HOLDINGS, INC., CROSS MATCH, INC., CROSS MATCH TECHNOLOGIES GMBH reassignment CROSS MATCH TECHNOLOGIES, INC. Assignors: IRVING, RICHARD D., SCOTT, WALTER GUY Application granted granted Critical Publication of US7010148B2 publication Critical patent/US7010148B2/en Assigned to SILICON VALLEY BANK, AS ADMINISTRATIVE AGENT reassignment SILICON VALLEY BANK, AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: CROSS MATCH HOLDINGS, INC., CROSS MATCH TECHNOLOGIES GMBH, CROSS MATCH TECHNOLOGIES, INC., CROSS MATCH, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Reassignment CROSS MATCH TECHNOLOGIES, INC. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to US14749899P priority Critical Priority to US09/425,947 priority patent/US6658164B1/en Application filed by Cross Match Technologies Inc filed Critical Cross Match Technologies Inc Priority to US10/690,641 priority patent/US7010148B2/en Publication of US20040156555A1 publication Critical patent/US20040156555A1/en Assigned to CROSS MATCH TECHNOLOGIES, INC. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)Original Assignee Cross Match Technologies Inc Priority date (The priority date is an assumption and is not a legal conclusion.
230000004044 response Effects 0.000 claims description 7 238000002310 reflectometry Methods 0.000 claims description 24 238000000034 method Methods 0.000 claims abstract description 80 RELEASE OF SECURITY INTEREST AT REEL/FRAME 028541/0559 Assignors: SILICON VALLEY BANK Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Assignors: SILICON VALLEY BANK Assigned to CROSS MATCH TECHNOLOGIES, INC., CROSS MATCH HOLDINGS, INC., CROSS MATCH, INC., CROSS MATCH TECHNOLOGIES GMBH reassignment CROSS MATCH TECHNOLOGIES, INC.
230000003287 optical Effects 0.000 description 6 238000004590 computer program Methods 0.000 description 7 230000000875 corresponding Effects 0.000 description 9 238000003860 storage Methods 0.000 description 12 210000003811 Fingers Anatomy 0.000 description 19
239000000835 fibers Substances 0.000 description 1 239000000428 dust Substances 0.000 description 1 238000009826 distribution Methods 0.000 description 1 238000004140 cleaning Methods 0.000 description 1 230000001413 cellular Effects 0.000 description 1 230000005540 biological transmission Effects 0.000 description 1
238000006011 modification reactions Methods 0.000 description 1 230000004048 modification Effects 0.000 description 1 238000005259 measurements Methods 0.000 description 1 238000004519 manufacturing process Methods 0.000 description 1
G06K— RECOGNITION OF DATA PRESENTATION OF DATA RECORD CARRIERS HANDLING RECORD CARRIERS 239000010703 silicon Substances 0.000 description 1 229910052710 silicon Inorganic materials 0.000 description 1
Slices) to create a composite input or reference pattern tracking a sweeping finger movement G06K9/00026— Image acquisition by combining adjacent partial images (e.g. G06K9/00006— Acquiring or recognising fingerprints or palmprints
H04L12/40123— Interconnection of computers and peripheralsFIG. H04L12/40117— Interconnection of audio or video/imaging devices H04L12/40052— High-speed IEEE 1394 serial bus Local area networks , wide area networks H04L12/28— Data switching networks characterised by path configuration, e.g.
Focus check function 304 identifies when tenprint scanner 100 is out of focus. Brightness function 302 will be described in detail with reference to FIGS. Brightness function 302 corrects for distortions in brightness due to pixel to pixel variations in the gain and offset of an image sensor. In another embodiment of the present invention, functions 302– 306 are performed as separate routines. In one embodiment of the present invention, functions 302– 306 are performed as one routine. Auto-calibration procedure 202 is comprised of three functions: a brightness function 302, a focus check function 304, and a geometric distortion function 306.
9–12.The present invention uses a gray level recorded by the image sensor for each pixel of the scanned bright strip and the scanned dark strip. Geometric distortion function 306 will be described below with reference to FIGS. Geometric distortion function 306 corrects for imperfect linearity in the geometry.
For example, the gray level recording for bright strip 406 might read 200, while the gray level recording for dark strip 408 might read 20. Ideally, both graphs should resemble a straight line since the gray levels throughout bright strip 406 and dark strip 408 do not vary. 7B is a diagram illustrating a graphical representation of an exemplary dark gray level 704 recorded by the image sensor for each pixel on the scanned dark strip.
In step 606, bright and dark gray level values are used to compute the equation of a line (y=mx+b) on a per-pixel basis. 6, step 604, control then passes to step 606. This is due to fabrication variations in the silicon of the CMOS image sensor.Referring back to FIG.
The equation of straight line 710 is determined by a y-intercept value, b 712 and a slope of line 710, m 714, where m 714 is equal to the rise over the run. A straight line 710 is drawn through bright gray level 708 and dark gray level 706 for pixel 14. A bright gray level 708 for pixel 14 is plotted at 90% reflectivity while a dark gray level 706 for pixel 14 is plotted at 10% reflectivity. For example, pixel 14 might have a gray level recording of 200 for bright gray level 702 and a gray level recording of 17 for dark gray level 704. As previously stated, the reflectivity of bright strip 406 is 90% and the reflectivity of dark strip 408 is 10%. For each pixel, the bright and dark gray level is plotted versus reflectivity.
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