WO2011078887A1 - Dispositif pour acquérir simultanément toutes les empreintes digitales des deux mains - Google Patents

Dispositif pour acquérir simultanément toutes les empreintes digitales des deux mains Download PDF

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Publication number
WO2011078887A1
WO2011078887A1 PCT/US2010/029449 US2010029449W WO2011078887A1 WO 2011078887 A1 WO2011078887 A1 WO 2011078887A1 US 2010029449 W US2010029449 W US 2010029449W WO 2011078887 A1 WO2011078887 A1 WO 2011078887A1
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WIPO (PCT)
Prior art keywords
fingerprint
thumb
fingerprints
fingers
hand
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Application number
PCT/US2010/029449
Other languages
English (en)
Inventor
Bruce E. Imsand
Nicholas R. Imsand
Ira J. Tabankin
Kipp O. Woodard
Original Assignee
Imsand Bruce E
Imsand Nicholas R
Tabankin Ira J
Woodard Kipp O
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Imsand Bruce E, Imsand Nicholas R, Tabankin Ira J, Woodard Kipp O filed Critical Imsand Bruce E
Publication of WO2011078887A1 publication Critical patent/WO2011078887A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths

Definitions

  • Biometric data acquisition and specifically the acquisition of all of the fingerprints of both hands, is the key to the identification of individuals. Fingerprint capture and comparison has been done for many years; it has been time consuming, often messy, and the person who is having their prints taken usually feels like a criminal even if they are innocent of any crime. Historically, this has been done through the use of ink and paper. The paper was then scanned into a computer scanner where data was shared and compared. In more recent times, the capture of a fingerprint is done directly by a small single finger digital scanner and the results communicated directly to a computer. Such capture of a single fingerprint at a time is currently in wide use today for portable biometric data gathering devices and personal notebook computers. The obvious disadvantage of a single finger scanning system is that it takes time to individually scan all 10 fingers. In addition, care must be taken to correctly document which fingerprint goes with which finger position record as it is recorded.
  • Fig. 1 is a view of fingers of a child gripping a softball.
  • Fig. 2 is a view of fingers of a female gripping a softball.
  • Fig. 3 is a view of fingers of a large male gripping a softball.
  • Figs. 4a and 4b are bottom views of fingers of right and left hands gripping a softball.
  • Figs. 5a and 5b are top views of fingers of right and left hands gripping a softball.
  • Fig. 6 is a view of right and left hands superimposed and gripping a softball.
  • Fig. 7 is a front view of the fingerprint capture device of the instant invention being gripped by a hand.
  • Fig. 8 is a side view of the fingerprint capture device of the instant invention being gripped by a hand.
  • Fig. 9 is a top view of location orientation of fingerprint scanners in the fingerprint capture device of the instant invention.
  • Fig. 10 is a top view of angular position of fingerprint scanners in the fingerprint capture device of the instant invention.
  • Fig. 1 1 is a side view of position of a fingerprint scanner as mounted in the fingerprint capture device, and showing a vertical inclination of the fingerprint scanner.
  • Fig. 12 is a block diagram of a fingerprint capture device of the instant invention.
  • Fig. 13 is a different embodiment of the instant invention.
  • Figs. 14 and 14a are illustrations of another different embodiment of the instant invention.
  • Fig. 15 is an upper level flowchart of logic flow illustrating a fingerprint capture process.
  • Fig. 15a is a more detailed flowchart of the fingerprint capture process.
  • Fig. 15b is a flowchart of detection of which hand the fingerprint is from based on location of a thumbprint.
  • Fig. 16 is an illustration of one example of a computer display associated with the process of obtaining fingerprints.
  • Fig. 16a is an illustration of a pop-up or similar menu related to Fig. 16. DETAILED DESCRIPTION OF THE DRAWINGS
  • a new class of fingerprint capture systems is provided with this invention, and which can capture the five individual fingerprints from each hand in two seconds or less.
  • Applicants invention automatically identifies which fingerprint goes with which finger, judges the quality of each fingerprint individually and provides feedback as to acceptability with respect to fingerprint standards.
  • the instant invention allows fingerprint information to be accepted from either hand in no required order, with handedness of fingerprints for the right and left hand being automatically identified and assigned.
  • the fingerprint capture device typically weighs less than a pound, is generally the size of a fast pitch softball, and can be adapted as a standalone device or used as a tabletop enrollment system in conjunction with desktop or portable computers.
  • a fingerprint capture device of the instant invention integrates a plurality, such as six, small individual fingerprint scanners supported by a support structure.
  • the support structure provides mounting structure for mounting scanning surfaces or fingerprint surfaces of the scanners from which a fingerprint is obtained at uniquely arranged locations and at predetermined orientations generally around a periphery of a ball-like object.
  • the support structure may be configured as a housing generally about the size of a fast pitch softball, and may be generally about 3 inches to 4 inches in diameter, although this size may be varied, as will be further explained.
  • Such an arrangement allows the vast majority of people to quickly grip the capture device so that their fingers are located on the fingerprint scanners, allowing capture of all four fingerprints and a thumbprint from fingers and thumbs of either hand simultaneously or in closely simultaneous relation.
  • a sixth scanner allows discrimination of each of the two thumbs, allowing the capture device to identify which hand, i.e. right or left, the five prints belong to by noting which thumb scanner is actively in use. This eliminates the need to present the fingers in any particular order. Either hand can be presented without declaration. Due to only one thumb scanner being used at a time, and that it is anatomically impossible for the right thumb to register on the left thumb scanner and vice versa, a thumbprint detected on a particular thumb scanner clearly and unambiguously declares whether the fingerprints are from a right or left hand.
  • the six scanners are arranged so that they can optimally function for the full range of hand size and gender, as will be described.
  • a regulation size fast pitch softball may be gripped. Such a softball can be picked up comfortably by a 12 year old child, or any man or woman using all five fingers.
  • the human hand and fingers may be of a wide range of sizes, but remarkably all can grasp a ball-like object 10 about the size of a fast pitch softball (3.8" in diameter). Moreover, it is observed that regardless of the size of the hand, the ends of the fingers can be positioned while grasping the ball so that the ends of the fingers are in the same geometric plane 12.
  • Fig. 1 shows typical child's fingers gripping a ball
  • Fig. 2 shows typical adult female's fingers gripping a ball
  • Fig. 3 shows fingers of a large male hand gripping a ball.
  • all sizes of hands can grip ball 10 in such a way that a plane 12 is defined by ends of their fingertips.
  • FIG. 12 Another way to define plane 12 is if the hand were positioned as if it were griping a ball 10, but the fingertips and thumb tip are pressed against a flat surface, as though plane 12 in Figs. 1 , 2 and 3 were a flat surface. Another observation is that the four fingers of the left and right hands can comfortably occupy the same spots on the surface of ball 10, with their fingertips generally along plane 12. This is true within a small margin regardless of the size of the hand. To illustrate this, Figs. 4a and 4b show bottom views of hands on the ball wherein locations L1-L4 are occupied by fingers on both hands, with the thumbs occupying unique thumb positions Tl and T2.
  • a third point is that while the position of the thumb for the right and left hands is different, these thumb positions are symmetrical about vertical center line C between locations L3 and L2. Also, the locations of the thumbs at Tl and T2 are substantially the same regardless of the size of the hand.
  • Another point is, as shown in Figs. 4a, 4b, and 5a, 5b, that when gripping ball 10, the thumb, and fingers 2 and 3, are positioned so that the areas of these fingertips having at least most of the fingerprint patterns thereon are flat against the surface of ball 10. However, fingers 1 and 4 are oriented so that these fingertips are somewhat sideways on the surface of ball 10.
  • a digital fingerprint capture device may be constructed from an article of ball-like construction including a support structure for 6 fingerprint scanners located generally at the predetermined orientation of fingertip locations L1-L4 and thumbtip locations Tl and T2, as shown in Figs. 4a and 4b.
  • the fingerprint surfaces of these scanners from which fingerprints are taken are generally normal to plane 10, and may be angled generally as shown in Figs.
  • the fingerprint surfaces may be or include optical devices, such as prisms and /or mirrors that fold the image of a fingerprint and direct it to a single scanner, or to scanners remotely located from the fingerprint surface.
  • Fig. 7 shows a fingerprint capture device 1 having a housing 16 constructed to receive fingers and each thumb of a subject whose fingerprints are to be taken.
  • Housing 16 is generally hemispherical, and configured to receive fingers and a thumb of one hand as though a ball, such as ball 10, is being gripped.
  • fingers 18, 20, 22 and 24 are placed in fingerprint stations or slots 26, 28, 30 and 32 respectively, of housing 16.
  • Slots 26, 28, 30 and 32 are positioned at locations around device 14 generally corresponding to locations L1-L4 of Figs. 4a and 4b, with small, discrete fingerprint scanners 34, 36, 38, 40 each having a face angled generally along one of the chords shown in Figs.
  • the fingerprint scanners 34, 36, 38 and 40 are mounted as shown so that the fingerprint surfaces thereof terminate at the far side of the recess formed by slots 26, 28, 30 and 32, respectively.
  • these stations or slots 26, 28, 30 and 32 are configured at locations around device 14 to receive fingers from either a right or left hand, as shown in Figs. 4a and 4b.
  • Thumbprints are obtained from two separate stations or slots disposed around device 14 at locations corresponding to locations Tl and T2 in Figs. 4a and 4b, with one such thumb slot 42 shown in Fig. 8.
  • the fingerprint and thumbprint scanners are selected so as to have a sufficient resolution so as to distinguish patterns of fingers and a thumb pressed against respective scanners. Typically, a resolution of 500 DPI or better is used, although in some instances lower or higher resolutions may be used. Another highly desirable criterion for a fingerprint scanner is size. Fingerprint scanners used in device 14 are sufficiently compact so as to be mountable generally within the volume of a fast pitch softball for reasons described previously. By way of example only, one scanner that has been found to work well is a fingerprint scanner model number FS91 , manufactured by FUTRONICTM, located in Kwai Fong, NT, Hong Kong. This scanner is an optical scanner that uses a CMOS array as a sensor and an infra-red LED as a light source.
  • the FS91 is small, allowing six of these sensors to be fitted into device 14, which as stated is about the size of a fast pitch softball about 3.8 inches in diameter. While these specific scanners are described as being used in device 14, it will be readily apparent to those skilled in the relevant arts that other scanners generally of a similar size and with specifications may also be used. There are also a range of orientations the fingerprint scanners may be positioned at that yield good results, but key to the design is the size of the scanners. The scanners must be small enough so that they fit in the required softball (more or less) sized volume while being arranged at the best angles and spacing.
  • Figs. 9, 10 and 1 Predetermined orientation of fingerprint scanners 34, 36, 38 and 40, and thumbprint scanners 42, 44, may be as shown in Figs. 9, 10 and 1 1.
  • Figs. 9 and 10 show the scanners from above as they are oriented in device 14, and referenced by an X, Y and Z coordinate system. This coordinate system is established such that the X axis is the vertical axis, the Y axis the horizontal axis and the Z axis is at the intersection of the X and Y axes and normal to the plane of the page.
  • a black dot denotes a center of a face of each fingerprint scanner, with the indicated distances and angles referenced from a line L extending from a respective black dot of each scanner, lines L being normal to the face of the scanner.
  • the fingerprint scanners 34, 36, 38 and 40 are inclined slightly from vertical as shown in Fig. 1 1 but otherwise vertically arranged. Distances of the black dot at the center of the face of the scanners from the X and Y axes are as shown in Fig. 9. Angles of the face of the fingerprint scanners with respect to the X and Y axes are as shown in Fig. 10, with angles of scanners 34, 36 and 42 being mirrored by the angles of scanners 38, 40 and 44. Thumbprint scanners 42, 44 are also inclined 5 degrees from vertical as shown in Fig. 1 1 , but are also tilted sideways toward each other at between about 20 and 25 degrees, with 23 degrees being optimal.
  • Such orientation of these fingerprint and thumbprint scanners is selected so that when device 14 is gripped by fingers and a thumb as though a ball were being gripped, a maximum surface area of the fingertips and thumb having the print patterns to be captured is pressed against respective fingerprint and thumbprint scanners.
  • the tilt of the thumb scanners allows the thumbprints to be captured in their proper orientation on the thumbprint scanners. This helps to minimize processing overhead. While specific positions and angles of the finger and thumb scanners are disclosed and arranged about a ball-like configuration of a specific size that accommodates the widest range of hands, other ball-like sizes are also contemplated as being encompassed by the instant invention.
  • the ball-like configuration may be made smaller by mounting the scanners in a smaller housing identical to or similar to that as described herein.
  • the housing may be made larger to accommodate larger fingers and hands.
  • angular orientation of the sensors may be varied within a range of comfort as long as such variance does not result in an unacceptable fingerprint.
  • a respective indicator 50 (Figs. 7, 8), which may be an LED indicator, is provided for each fingerprint scanner 20, 22, 24, 26, and a respective indicator 52 is provided for each thumbprint scanner 42, 44. These indicators provide at least a visual indication of when a respective fingerprint or thumbprint is successfully captured. While LED indicators for this function are disclosed, other indicators, such as low-power incandescent lamps, LCD displays, or even a speaker that provides audible tones or a voice indication may be used to indicate successful capture of each fingerprint and thumbprint. In addition, other conditions may be indicated, and where the indicator is an LED, the LED may be a bi-color or tri-color LED, with different conditions indicated by different colors, as will be further explained. In other embodiments, separate differently- colored LEDs or lamps may be used to indicate such other different conditions.
  • capture device 14 may be connected or coupled to a computer, which may be a host computer, i.e. a desktop computer or laptop computer or the like via an electronic interface, in order to control device 14 and capture at least fingerprints and a thumbprint therefrom.
  • a computing device such as a small computer processor or microcontroller 14a may be built into or integral with the housing of device 14.
  • Such a local processor 14a may be used to locally evaluate the quality and validity of each scanned fingerprint and send the resulting fingerprint data through a data link for storage or use by a remote computer or user.
  • Such a remote computer may provide functions such as attempting to match newly obtained and transmitted fingerprints to a data base of fingerprints for identification purposes, or to match fingerprints of an individual with their own fingerprints stored in a database of fingerprints in order to control access to secure areas by operating locks of one or more doors or other secure areas.
  • capture device 14 may be mounted near a door controlled by the capture device 14, and operated by the individual wishing to gain access through the controlled door.
  • a small database of fingerprints of those having access permission may be stored within device 14, and provide local comparison for access to a single building or room by matching an individual's fingerprints with his/her own fingerprints in the local database within device 14. This provides greater security by eliminating the necessity for a so-configured device 14 to be connected to a network, and requires all fingerprints from an individual instead of just one fingerprint.
  • computer 14a may be used to temporarily store fingerprint data as raw data prior to transmission to a host computer, or convert the raw data to a particular protocol as desired by the user.
  • the memory associated with computer 14a may be sized so that a number of sets of fingerprints, such as up to 100 or more, may be temporarily stored for later transmission to a host computer.
  • a small, portable keyboard similar to those found for use with some cellular telephones and PDAs may be attached to computer 14a, as by a USB or other port, so as to associate identification data, such as a name or social security number, with each set of stored prints.
  • such a port may also be used to connect device 14 to a host computer in order to obtain fingerprints from a subject or to download stored fingerprints in device 14 to another computer.
  • capture device 14 is coupled to a desktop or laptop computer, as by the aforementioned USB or other link
  • the fingerprint /thumbprint data is transferred using a USB or other port protocol.
  • Other links may be any suitable serial link, such as a FirewireTM link, or a parallel link such as a printer link. As noted, any such link would necessarily be supported by the appropriate components mounted within the housing of capture device 14 or attached thereto.
  • Another example of a wired link that may be used to transfer fingerprint data is an Ethernet network link.
  • the link may be a wireless communications link, such as a WiFi link.
  • a modular WiFi transmitter and receiver, and ancillary components may be built into the housing of device 14, and configured for sending the fingerprint /thumbprint data to a WiFi transmitter and receiver of the laptop or desktop computer in a peer-to-peer system.
  • the WiFi transmitter in device 14 may be configured to connect to the Internet and send the fingerprint /thumbprint data to a local computer over the Internet or to a remotely-located computer over the Internet.
  • Other wireless links may include a cellular link through a cellular network, which may be 3G/4G networks, or any other suitable cellular network.
  • Yet other wireless links may include an optical link such as an infrared link.
  • the fingerprint data could be transferred from device 14 to a temporary storage device, such as a thumb drive, SD card or the like, for temporarily storing the fingerprint data until it can be downloaded for more permanent storage or processing.
  • a temporary storage device such as a thumb drive, SD card or the like
  • the appropriate port, and if necessary, drivers for the storage device or devices would be incorporated in device 14.
  • the fingerprint and thumbprint data may be temporarily stored as raw scanned data, either in a computer integrated with capture device 14 or in a computer the device is linked to, and later converted to whatever fingerprint format desired, or processed immediately into the appropriate format.
  • a dedicated computer 14a is housed within capture device 14 or integrated therewith, processing of the fingerprint and thumbprint data into a desired format may be done within device 14 prior to transmission of the fingerprint data to another location for use, analysis or storage.
  • fingerprint scanners 34, 36, 38 and 40, and thumbprint scanners 42, 44 may be connected to a USB hub 54.
  • an LED microcontroller 56 may be provided, and is connected to the USB hub for receiving signals from a computer in order to operate the LEDs to indicate when a fingerprint or thumbprint is obtained.
  • a sound decoder 58 and associated speaker 60 may be provided to indicate that capture for all fingerprints and thumbprints is complete, and possibly request some other action, such as insertion of a smart card into a smart card reader 60 or activation of some other form of identification device, such as an optional RFID (radio frequency identification) device 62.
  • Circuit 62 may also be used to acquire biographical or other data from ID cards.
  • a computer 64 which may be a host computer or integrated computer, polls and interleaves scan data from the fingerprint and thumbprint scanners in blocks of data, which may be 512 bytes, and transmitted, by way of example, at 480 MB/S from each of the fingerprint and thumbprint scanners using a conventional USB format.
  • the computer When fingerprints are detected on the scanners, or when an operator of a host computer chooses from a menu selection to begin a fingerprint scan, and as noted above, several fingerprints are obtained at different illuminations, typically by varying the light intensity output from a respective infra-red LED within each scanner. Upon selecting the best fingerprint image from the several images taken by a scanner and determining that it is acceptable, as will be further explained, the computer flags that scanner input as having provided a fingerprint image. The LED is switched to indicate a processing function or that a good fingerprint image has been obtained, and the image is saved for further processing or storage.
  • the single thumbprint scanner that detects a thumbprint indicates whether the scans are from a right or left hand due to the unique positioning of the thumbprint scanners, as earlier explained. Typically, the process of obtaining fingerprints and a thumbprint from one hand takes about 1-2 seconds or less, a significant reduction in time over that of a single portable fingerprint scanner where each fingerprint and thumbprint must be taken individually.
  • a red condition of an LED or other indicator associated with a discrete scanner may be used to initially indicate that the scanner is ready to scan for a fingerprint. After a finger is placed on the scanner and a fingerprint obtained, the LED may be switched to yellow to indicate that the sampled fingerprint is being processed or checked against predetermined criteria. If processing determines the fingerprint is defective or the process was not able to be completed, then the LED may be once again switched to red to indicate a problem to the person whose fingerprints are being taken. If all the fingerprints are determined to be good, or possibly that other additional processing is completed, the LED or LEDs may be switched to green, indicating completion of the process.
  • Such next action may instruct the subject to grip device 1 with the other hand or request other data to be entered, which may be via an optional RFID (radio frequency identification) incorporated in capture device 14 or via a keyboard.
  • RFID radio frequency identification
  • the fingerprint data typically would then be cataloged in the computer in a database format deemed appropriate by the user or organization for which the fingerprints are obtained.
  • only 5 scanners may be used, with the thumb scanner positioned in the rear and generally centered on line C (Figs. 4a and 4b) in a vertical orientation that allows the thumb of either hand to reach.
  • This embodiment may be somewhat more awkward for some people to use, although there is slightly less processing overhead in that only five fingerprint scanners need to be examined for fingerprints. It also has the disadvantage of not automatically identifying which hand (right or left) the prints are from. In this embodiment, handedness is assigned manually by an operator, who assigns which prints goes with which fingers.
  • an embodiment with 5 scanners may be constructed so that it is gripped on one side by one hand, and gripped on the other side by the other hand. In other words, and referring to Fig.
  • the device may be constructed on a bottom side similar to the top side so that fingers and a thumb could be placed in their respective slots or stations from either a top or bottom, the top being one hand and the bottom being the other hand.
  • a sensor such as an optical sensor or a mechanical trigger, may be used to determine which side the hand is on, thereby determining handedness.
  • the LEDs 50 would be relocated as appropriate, or omitted.
  • FIG. 13 Another embodiment is shown in Fig. 13. This embodiment provides 10 fingerprint scanners organized in two sets, one for each hand, each set of 5 scanners arranged as shown in Figs. 9 and 10, except there is only one thumb scanner for each hand. This embodiment allows fingers and thumbs of both hands to be scanned at the same time.
  • a capture device 14 is attached to or integral with a hand held computer 64 that incorporates a digital camera having a viewing screen 66.
  • This embodiment may be constructed to be positioned in one of two configurations.
  • capture device 14 may be folded away from a lens of the camera (not shown) to allow the subject to be photographed (using viewing screen 66 or a viewfinder 68) by an operator, and present capture device 14 for quickly obtaining the subject's fingerprint data.
  • the second configuration as shown in Fig. 14a, allows capture device 14 to be folded over viewing screen 66 so that the combined hand held computer/ camera may be used as a standalone fingerprint capture device for use on a table top or other surface.
  • any of the embodiments of the invention may be powered by batteries and/ or a vehicle power supply such as a 12 volt supply of an automobile, or be powered by a power supply that plugs into a conventional electrical receptacle.
  • the power supply may be integrated within the device, and powered by conventional AC power.
  • FIG. 15 shows, by way of example only, a typical host computer logic flow for capturing fingerprints.
  • This flowchart is a relatively high-level flowchart depicting capture of fingerprints that would typically be stored in a database of fingerprints, each set of fingerprints accompanied by other data related to the individual, as will be further explained.
  • the program may be written in C++, or any other programming language deemed appropriate by a programmer.
  • an open source code operating system such as LinuxTM, may be used and appropriately programmed.
  • the operating system or code used to operate and control device 14 may also be integrated in firmware such as field programmable gate arrays or ASICs using the appropriate hardware description language.
  • each fingerprint /thumbprint scanner becomes active, and the scanners may be repeatedly and continuously polled or otherwise examined for fingerprint /thumbprint data, or programmed to begin operating responsive to an operator of a host computer selecting an option from a displayed menu.
  • a user grips the fingerprint scanners of device 14, which as stated is similar to gripping a fast pitch softball, all the fingerprint scanners (6 in the case of Fig. 15) that are gripped register fingerprint data.
  • fingerprint data is detected, as by polling of each scanner, and at box 70, six parallel threads of logic flow, one for each scanner, are established.
  • threads 34, 36, 38, 40 for the respective finger scanners, and scanners 42 and 44 for the respective thumb scanners (Figs. 9, 10).
  • threads 34-44 For each of threads 34-44, and using thread 34 for descriptive purposes, at box 72 several scans, such as 7 scans, of the fingerprint are initially taken at different infra-red illumination levels, the illumination levels typically arranged from lowest illumination to highest illumination, and the 7 scans cached.
  • the cached scans are examined, and the best fingerprint scan is selected. Such selection may be based on a contrast level, in which case the scan having the highest contrast is selected, although other criteria for selection of the best fingerprint image may be used.
  • the selected image may be compared with predetermined criteria of a fingerprint standard, such as the NIST standard (the American National Standard for Biometrics). If the fingerprint image is not acceptable, the logic flow loops back to box 72 where new scans are taken. In most instances, this loop occurs because the several scanned fingerprint images do not fully capture as much of the fingerprint as necessary to sufficiently describe the fingerprint, in which case the subject will be instructed or prompted to move or rotate the offending finger to a new orientation where more fingerprint data can be collected. In other instances, dirt, grease or like may obscure the fingerprint, in which case it will be necessary for the subject to wash his/her hands, or the face of the fingerprint scanner cleaned.
  • a fingerprint standard such as the NIST standard (the American National Standard for Biometrics).
  • a plurality of new scans are then taken using the same different illumination levels, or in some embodiments the different illumination levels may be changed, for instance to accommodate a bright or dark environment or other environmental factors.
  • the logic flow proceeds to box 80 where the logic waits for all 5 threads to complete. If a successful scan on all five fingers is not completed in a predetermined period of time, by way of example 5 - 10 seconds or so, then failure indications for the offending finger may be provided by a YES at box 82, such as illuminating a respective LED red, or activating other failure indicators that may be activated at box 84, including prompting an operator for an action.
  • scans continue to run on the offending finger at boxes 72-76, and the subject is instructed to adjust position of his finger until a successful scan is obtained, or the operator intercedes or is prompted to document the missing or unscannable finger.
  • the operator may be queried at box 84 as to whether further scans are to be attempted, and if so then the logic loops back to box 80 in order to attempt to obtain an acceptable fingerprint.
  • the operator may select a menu selection indicating that no retry is to be performed, and a NO is returned at box 84, and the good fingerprints are saved at box 86.
  • a notation may be entered with that person's identification data that the missing fingerprint was unobtainable. Where a person has six fingers, the sixth finger may be scanned separately, for instance by the unused thumbprint scanner, or simply ignored and a notation that the extra finger was not scanned entered along with that person's identification data.
  • the query is posed whether both hands have been scanned and saved, and if the answer is NO the logic loops back to box 70 to provide a prompt for the subject to grip the scanners of capture device 14 with fingers of the other hand. Where the answer is YES, the process of obtaining fingerprints from both hands for that person is completed. Either before or after obtaining the fingerprints, other identification data, such as a name, employee identification number, place of residence and the like may be entered and associated with the obtained fingerprints in whatever database format is deemed acceptable.
  • each fingerprint /thumbprint scanner captures a relatively high resolution image, such as at 500 dpi (dots per inch) and selects a best choice of a plurality, such as 7, different illumination levels, typically provided by a Near Infrared (NIR) LED driven at different power levels. As noted, other types of illumination may be used, depending on the type of scanner used.
  • NIR Near Infrared
  • the best scanned image for each finger is then analyzed to insure that it meets at least one selected fingerprint or biometric quality standard, such as the NIST standard.
  • the USB address port of each scanner is paired with and known with respect to each finger position.
  • a thumb when a thumb is applied to one of the thumb scanners, it is immediately known whether the fingerprints are from the right or left hand, and which fingerprints are associated with which finger.
  • a thumbprint is detected on scanner 42, it is immediately known that scanner 34 is obtaining a fingerprint from an index finger, scanner 36 is obtaining a fingerprint from a middle finger, scanner 38 is obtaining a fingerprint from a ring finger and scanner 40 is obtaining a fingerprint from a pinky finger.
  • scanner 40 is obtaining a fingerprint from an index finger, and so forth.
  • Fig. 15a illustrates, by way of example, and in more detail, the process of boxes 72, 74 and 76 (dashed lines) of Fig. 15. As noted, this process occurs for each of threads 34, 36, 38 and 40, which processes applying to fingerprints. Thumbprints are handled slightly differently, as will be explained with respect to Fig. 15b.
  • an indicator such as an LED
  • the LED is a multicolor indicator, such as a tricolor LED capable of displaying red, green and yellow, red may be used to indicate this initialized condition.
  • the process may be started automatically, as when the scanners are constantly taking images at a predetermined rate, such as 5- 10 images per second, or when an operator of a host computer initiates scanning via a keyboard. In either case, the logic drops to box 92 where several fingerprint scans, such as 7, are recorded at different illumination levels by varying the illumination for each scan.
  • the scanners given by example utilize near infra-red light, although other suitable scanners may use different wavelength illumination.
  • the scan having the best contrast is selected as being the best scan, and this best scan is saved or cached.
  • the LED is switched to a different color to indicate processing in progress, and at box 98 the saved scan is compared or analyzed with respect to the criteria to determine quality of the scan. If analysis shows that the print is good at box 100, then the logic proceeds to box 102 where the LED is switched from the color selected for processing to a color indicating a good print has been obtained, such as green. If, at box 100, the analysis determines that the print is insufficient or does not meet the required criteria, the logic proceeds to box 104 where the LED is switched to a color indicative of a bad print, such as red, and the operator is prompted at box 106 for a response.
  • a bad print such as red
  • the operator may be presented with a menu selection wherein the operator may choose to retry at least the finger or fingers associated with the bad print at box 108, make a notation in the database that the individual has a missing finger at box 1 10, make a notation at box 1 12 that the fingerprint is unobtainable, or ignore the fingerprint at box 1 14.
  • the logic loops back to box 92 to repeat the process of boxes 92-98.
  • the process repeatedly fails for one or more fingers, then at box 1 16 the aforementioned notations may be entered into a database.
  • a process is shown for detecting whether fingerprints of a right or left hand are being obtained. This process may occur in threads 42, 44 as indicated at B in Fig. 15.
  • scanners 42, 44 in Figs. 9 and 10 are scanners for receiving thumbprints, with scanner 42 receiving a thumbprint of a right hand and scanner 44 receiving a thumbprint of a left hand.
  • thread 42 in Fig. 15b indicates a process for a right hand while thread 44 indicates a process for a left hand.
  • the query is posed as to whether fingerprints are detected on the other fingerprint scanners 34, 36, 38, and 40.
  • the logic drops to one of boxes 124, 126 where the query is posed whether the thumbprint is detected on scanner 42 or 44. If the thumbprint is detected on scanner 42 then the logic at box 124 proceeds to box 128, where the fingerprints are designated as being from a right hand. Likewise, if the thumbprint appears on scanner 44, then the logic at box 126 drops to box 130, where the fingerprints are designated as being from the left hand. In either case, after a handedness designation is made, the prints are populated at boxes 132, 134 for the correct hand, and the logic returns to B of Fig. 15.
  • a NO response is provided by both boxes 124 and 126 to box 136.
  • box 136 receives a NO response from both boxes 24, 126, an indication is provided at box 138 to prompt the operator for a response.
  • the operator may manually assign handedness at box 140, or return the logic to box 70 of Fig. 15 to retry the process. If the logic of Figs. 15, 15a and 15b is free-running, then it will stop at box 138 with no fingerprints or thumbprints on device 14 since boxes 124, 126 are both providing a NO response to box 136.
  • This may be a logical starting point for an embodiment that employs a host computer wherein an operator chooses from a menu at box 138 to proceed to box 70 of Fig. 15 to initiate scanning for a new set of fingerprints.
  • handedness may be manually assigned at box 140.
  • the process at box 76 for threads 34-44 would be to compare the instant fingerprints and thumbprint to fingerprints and thumbprints in a database. Also, at box 82, rather than prompting an operator for action at box 84, the person seeking access would be prompted either to retry the scan or alter position of one or more fingers or thumb in order to obtain a good fingerprint or thumbprint, and the process would loop back to box 70. Once the fingerprints and thumbprints of the person seeking access are identified as a matching a set of prints in the database, access for that person would be granted.
  • FIG. 16 an illustration, by way of example only, of a graphic interface is shown.
  • Graphic interface 16 allows a user to at least monitor, and if necessary manually control at least portions of the fingerprint acquisition process.
  • a computer or other display 150 may show graphics of a left hand 152 and a right hand 154.
  • At the end of each of fingers F and thumbs T may be provided an indicator 156 for fingers and an indicator 158 for a thumb. These indicators may be switched in color in accordance with the LED color scheme as described for Fig. 15a.
  • the respective indicator 156 would indicate a red color, as indicated at box 104 (Fig. 15a).
  • the "EXCEPTIONS” button would be highlighted or change color, and a menu selection 162 would appear, as indicated at boxes 108- 1 14 and as shown in Fig. 16a.
  • the "EXCEPTIONS” button would simply become highlighted or change color, and the operator would select the "EXCEPTIONS” button in order to make the menu of Fig. 16a appear.
  • the menu selection of Fig. 16a may be a pop-up menu, a drop-down menu, a new screen, or any other suitable presentation.
  • buttons or other indicators may be provided with distinctive colors as previously described, or may otherwise be highlighted.
  • a "CLEAR" indication may be provided for the respective fingers, with these buttons being colored green, uncolored or otherwise not highlighted.
  • the corresponding "MISSING" button or indicator of Fig. 16a may be illuminated, given a red color or otherwise highlighted, as indicated by hatching of the "MISSING" box for the ring finger of Fig. 16a, to indicate the fingerprint was unacceptable or unavailable.
  • the operator may choose the 'UNAVAILABLE" button, and make the appropriate notation in the file record for that person.
  • a visual indication or display of the obtained fingerprints from each finger of each hand may be provided in fields 164 (Fig. 16). Such visual indications may be used by the operator to determine the reason for a bad fingerprint so that a subject may be instructed as to how to reposition a finger or thumb for a retry.
  • Other pertinent information related to the subject may be entered by the operator in field 166, as by a keyboard. Once all the information is entered and the fingerprints processed or otherwise acted upon, the operator may save all information to one or more files at box 168.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Image Input (AREA)

Abstract

L'invention divulgue un dispositif d'acquisition d'empreintes digitales (14) pour acquérir simultanément ou dans une relation pratiquement simultanée les empreintes digitales de tous les doigts et d'un pouce. Une pluralité de surfaces d'empreintes digitales (34, 36, 38, 40) pour recevoir des empreintes digitales sont orientées dans un boîtier hémisphérique (16). Le montage particulier de ces surfaces d'empreintes digitales lui permet de recevoir les empreintes digitales comme si la main de la personne à laquelle on prend les empreintes saisissait une balle (10) et pressait les extrémités de ses doigts contre une surface (12). De ce fait, les surfaces d'empreintes digitales sont montées de façon essentiellement normale au plan ou à la surface (12). Dans un mode de réalisation, 5 surfaces d'empreintes digitales sont utilisées, avec une surface d'empreinte de pouce qui est utilisée pour les deux pouces. Dans un autre mode de réalisation, 6 surfaces d'empreintes digitales sont utilisées, avec une surface séparée pour chacun des pouces, ce qui permet une discrimination automatique de manualité. Le dispositif (14) peut être un dispositif de prise d'empreintes digitales à accès autonome qui incorpore un micro-dispositif de commande, ou qui est connecté à un ordinateur à des fins d'enregistrement.
PCT/US2010/029449 2009-12-24 2010-03-31 Dispositif pour acquérir simultanément toutes les empreintes digitales des deux mains WO2011078887A1 (fr)

Applications Claiming Priority (2)

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US29016709P 2009-12-24 2009-12-24
US61/290,167 2009-12-24

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Cited By (3)

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WO2016007401A1 (fr) * 2014-07-07 2016-01-14 3M Innovative Properties Company Détection de médicament inviolable auto-administré
US10169631B2 (en) 2017-03-06 2019-01-01 International Business Machines Corporation Recognizing fingerprints and fingerprint combinations as inputs
CN109858348A (zh) * 2018-12-25 2019-06-07 航天信息股份有限公司 一种基于线程控制采集十指指纹的方法及***

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WO2007042918A2 (fr) * 2005-10-12 2007-04-19 Sygade Solutions (Proprietary) Limited Dispositif d'acquisition d'images d'empreintes digitales simultanees pour une pluralite de doigts
US7218761B2 (en) * 2002-12-06 2007-05-15 Cross Match Technologies, Inc. System for obtaining print and other hand characteristic information using a non-planar prism
KR20070087532A (ko) * 2007-05-15 2007-08-28 연세대학교 산학협력단 비접촉식 5지 지문 영상 획득 장치

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US7218761B2 (en) * 2002-12-06 2007-05-15 Cross Match Technologies, Inc. System for obtaining print and other hand characteristic information using a non-planar prism
WO2007042918A2 (fr) * 2005-10-12 2007-04-19 Sygade Solutions (Proprietary) Limited Dispositif d'acquisition d'images d'empreintes digitales simultanees pour une pluralite de doigts
KR20070087532A (ko) * 2007-05-15 2007-08-28 연세대학교 산학협력단 비접촉식 5지 지문 영상 획득 장치

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016007401A1 (fr) * 2014-07-07 2016-01-14 3M Innovative Properties Company Détection de médicament inviolable auto-administré
US20170196504A1 (en) * 2014-07-07 2017-07-13 3M Innovative Properties Company Self-administered tamper-evident drug detection
AU2015288124B2 (en) * 2014-07-07 2018-07-05 Attenti Electronic Monitoring Ltd Self-administered tamper-evident drug detection
US10433787B2 (en) 2014-07-07 2019-10-08 3M Electronic Monitoring Ltd Self-administered tamper-evident drug detection
US10169631B2 (en) 2017-03-06 2019-01-01 International Business Machines Corporation Recognizing fingerprints and fingerprint combinations as inputs
CN109858348A (zh) * 2018-12-25 2019-06-07 航天信息股份有限公司 一种基于线程控制采集十指指纹的方法及***
CN109858348B (zh) * 2018-12-25 2023-06-30 航天信息股份有限公司 一种基于线程控制采集十指指纹的方法及***

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