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bioMetric Veriprox, Руководство по эксплуатации

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A

P P E N D I X  

A

 

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U A L I T Y   A N D  

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O N T E N T

Page 52

© 1999 Biometric Identification, Inc.

Section A.3 - Using Content and Quality during Enrollments

As described in section A.1, Quality and Content scores are returned in the enrollment
process. These scores give an indication of the performance of the template enrolled. To a
large degree, the verification algorithm compensates for deficiencies in image quality and
loss of information content. Nonetheless, knowledge of these parameters and what they
mean helps ensure optimal performance of the Veriprox.

False Acceptance and False Rejection

In order to understand the effects of poor image quality

 

and poor information content

it is necessary to understand how to measure performance. Performance of the
Veriprox is presented in terms of False Rejection and False Acceptance.

False Rejection indicates that the Veriprox incorrectly rejected a fingerprint
that corresponds to the person’s template. False Rejections rarely occur
and primarily result from the inability to get a good image of the finger.

False Acceptance indicates that the Veriprox accepted a fingerprint that
does not correspond to the template it was compared against. False
Acceptances also are rare and primarily result when a fingerprint template
is characterized by low information in the enrolled print.

The algorithm on the Veriprox has been tuned so that the false acceptance and false
rejection rates are equal at the medium security level (level 3), delivering the industry
leading accuracy. This is known as the Equal Error Rate. Increasing the security
(e.g., changing the security level from 3 to 1) will decrease the chance for false
acceptance at the expense of increased false rejection. Reducing the security (e.g.,
changing the security level from 3 to 5) will decrease the chance of a false rejection
at the expense of false acceptance. The table below indicates the expected error
rates at the different security levels.

Security Level

False Rejection Rate

False Acceptance Rate

Very Low (5)

1 / 10,000

1 / 100

Low (4)

1 / 5000

1 / 200

Medium (3)

1 / 1000

1 / 1000

High (2)

1 / 200

1 / 5000

Very High (1)

1 / 100

1 / 20,000

Содержание Veriprox

Страница 1: ...Td1136_rev0700 1999 Biometric Identification Inc Veriprox Operations Manual ...

Страница 2: ...revise this document without notice It is always our goal at BiometricID Inc to supply accurate and reliable documentation If you discover a discrepancy in this document please e mail your comments to support BiometricID com or contact Biometric ID Technical Support at the telephone number listed below No part of this publication may be placed in a retrieval system transmitted or reproduced in any...

Страница 3: ... is using the designations only for editorial purposes and to the benefit of the trademark owner with no intent to infringe upon that trademark The following trademarks are found in this manual Microsoft and Windows 95 Windows 98 and Windows NT are trademarks of the Microsoft Corporation Veriprox is a registered trademark of Biometric Identification Inc HID is a trademark of the HID Corporation Mo...

Страница 4: ... voided for failure to comply with Biometric ID s return procedures as given in the Biometric ID Technical Support Guide Any service provided by unauthorized personnel voids the warranty Biometric ID offers three 3 options to our customers that have a problem with one of our products 1 Warranty Service if the unit is covered under either the factory one year warranty period or any extended warrant...

Страница 5: ...not extend the warranty period Repair work is warranted for 90 days from the date of shipment Replacement components are warranted for one year from the date of shipment Returned product s whether warranty or out of warranty diagnosed as No Problem Found will be subject to a 150 handling charge and will be returned as is at the buyer s expense Privacy Statement Biometric Identification s unique ap...

Страница 6: ... 1 User Cards 14 Command Cards 14 Basic System Administration 15 Enrollment 15 Templates 15 Multiple Readers 16 Backing Up Templates 16 Lights 17 Veriprox Administrative Software 18 Concepts of Operation 18 Transmit ID 18 Ports 19 Serial Port Settings And Baud Rates 19 Installing the Software 20 Setting up the ID File 21 ID File Format 21 Communication Settings file 22 Setting up a Network 23 Icon...

Страница 7: ...OUT 43 Failure Code 43 Site Code 43 Host Port and Aux Port Baud Rates 44 Host Port Protocol 44 Broadcast 45 Net Status 46 Getting Service and Support 47 Technical Support 47 Customer Service and Sales Support 47 World Wide Web Site 47 Appendix A Quality and Content 48 Section A 1 Basic Biometric Concepts 48 Biometric Definitions 48 Scanning an Image 48 Storing User Templates on the Veriprox 49 Sec...

Страница 8: ...Page 7 1999 Biometric Identification Inc ...

Страница 9: ...Page 8 1999 Biometric Identification Inc Notes ...

Страница 10: ...ngerprint recognition technology with the highest degree of accuracy at a reasonable cost while still being easy to use BiometricID has successfully migrated technology once found only in government or military applications toward private industry and small businesses around the globe It has been known for years that each person has unique fingerprints Using fingerprints as a means of identificati...

Страница 11: ...on software hosted on a PC Once installed users simply present their identification cards when entering the secure area and then touch a fingertip to the recessed area on top of the unit The system validates their fingerprint against a previously enrolled template stored in flash memory The Veriprox system provides security features that can minimize fraud and can tolerate changes to the user s fi...

Страница 12: ... T I O N Page 11 1999 Biometric Identification Inc Veriprox Physical Layout Figure 1 Top View Figure 2 Bottom View Top LED Front LED power on Sensor Ridge Lock Power On Light Bottom Aux Port Cover closed Locking Screw ...

Страница 13: ...4 Bottom Panel open Figure 5 Veriprox Unit and Mounting Plate For additional information on installing and connecting your Veriprox unit please refer to the Veriprox Installation Manual Locking Screw RJ 11 Auxiliary Port Mounting Plate Part and Serial Number Tag Pigtail Connector ...

Страница 14: ...can be configured to send out a pre determined failure ID whenever an unsuccessful verification occurs An additional option allows the site code to be replaced with another number The Veriprox has several communication options It is equipped with both a Host port and an auxiliary port The Host port may be configured to operated in RS 232 mode or RS 485 mode The auxiliary port is always set to RS 2...

Страница 15: ...created to add and remove users from a Veriprox reader without using the PC based Administrative Software These can be useful for creating and removing temporary visitor s badges or administering the system when your PC is down or unavailable There are two types of Command Cards associated with the Veriprox Enroll Command Cards Delete Command Cards Note The command cards must be created using the ...

Страница 16: ...ch time a fingerprint is enrolled a new template is generated using the number from the proximity card as the Template ID number The system automatically increments and assigns an index value to each template Figure 7 Template ID Numbers 1 The ID number of the card to which the template is being assigned 2 The index number of the template this is assigned automatically by the software Index number...

Страница 17: ... 485 lines using the Administrative Software If the readers are not interconnected a laptop can be used to download the templates from the administration reader and then uploaded to each reader through its Aux Port Backing Up Templates Templates can be backed up by downloading them to a PC On the PC template files are of the type tem The name of the file is derived from the Template ID Number and ...

Страница 18: ...n an Enroll Command Card is used to add a new user to the reader Steady Green the Veriprox is indicating the successful completion of one of the following operations Verification Enrollment Deletion A steady green light is accompanied by an audible beep Steady Red the Veriprox is indicating the current operation has failed Blinking Red the Veriprox is requesting a proximity card be waved The card ...

Страница 19: ... networked environment and view and or edit the templates on those readers Concepts of Operation Transmit ID On the tool bar of the Administration Software there is a drop down list titled Transmit ID see Figure 10 below The ID number that appears in the field is the Veriprox reader with which the software currently is communicating For this reason each Veriprox reader must be assigned a Network I...

Страница 20: ... on the PC are talking with which readers As usual the serial ports on the host PC are designated as COM1 COM2 etc You may connect up to 31 Veriprox readers to each COM line using RS 485 You must provide the Administration Software with the information as to which Network ID has been assigned to which COM line This information is stored in an initialization file that is read by the software on app...

Страница 21: ...which to install the software The default path is C Program Files BioID Veriprox Like most Windows based installations you will step through a number of windows approximately 5 that will request basic installation information such as file name and directory location It is recommended that you use the default settings for these however you can change them Once the installation is complete a short c...

Страница 22: ...is port Separate each ID by a space Line 3 Type a to end the comm port Example COM 1 UnitIDs 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 COM 2 UnitIDs 31 32 33 Notice how the line for the Unit IDs for Comm 1 wraps the software will continue to read the line until the A space should appear after each colon and between each reader ID number Once you have comple...

Страница 23: ...are This is the CommParameters cfg file The program automatically writes this file when it is closed The next time the program is opened this file is read and the communication parameters are set to match their state when the program was last shut down The first time you run the Veriprox Administrative software this file does not exist You will see the following dialog appear Fill out the desired ...

Страница 24: ...f 2 Plug into the Aux Port using the RJ 11 jack on the bottom of the unit and connect the cable to one of the serial ports on your PC 3 Access the Communication Settings window by clicking on the icon or using the menu 5 Click the Modify button Set the Transmit ID to 1 Set the Comm Port setting to match the designation for the port you are using on the PC e g COM1 COM2 6 Set the baud rate setting ...

Страница 25: ...that will be used when you connect to the Veriprox through the Host Port wires on the back of the unit 13 Set the Host Port Protocol to RS 485 if you will be using a networked environment Alternatively you may choose RS 232 if you will not be networking the Veriprox Remember that the RS 232 and RS485 connections are made through different wires on the pigtail Consult the installation manual Make s...

Страница 26: ...le to access the features mentioned above either through the icons and drop down box on the toolbar or through the command menus Template Manager page 27 Icon Command Path File Template Manager Command Card Manager page 36 Icon Command Path File Command Card Manager Communication Settings page 39 Icon Command Path Configure Communication Settings Veriprox Parameters page 40 Icon Command Path Confi...

Страница 27: ...smit ID Drop Down The Transmit ID number refers to the IDs given to individual Veriprox units Whichever number appears in the box is the unit with which the software is communicating If you have networked more than one Veriprox unit you can use the Transmit ID drop down box to access a specific unit by its ID number The ID numbers show in the drop down list come from the UnitIDs dat file described...

Страница 28: ...c Template Manager The Template Manager allows you to Edit Templates Enroll Templates Delete Templates Verify Templates Transfer templates to and from a PC or from one Veriprox unit to another Veriprox unit Figure 12 Template Manager Click this button to update the window ...

Страница 29: ... number in the window and an Edit box will open Note While you can use the Shift and Ctrl keys to select multiple templates realize that a separate window will open for each template you select A window like the one below will open Figure 13 Template Viewer From here you can view and edit the attributes of the template such as the Employee Name and Security Threshold You must press the Save Change...

Страница 30: ...e designation 2 Click the Enroll button The light on the Veriprox will glow amber requesting the enrollee to place a finger on the sensor Nestle the ridgelock into the first joint line on the finger The finger may be removed when the amber light goes out 3 The light will glow green and the unit will beep once to acknowledge that the fingerprint has been captured If a finger is not placed within te...

Страница 31: ...you are enrolling Note remember that if the card number already has been designated as one of the three types then any subsequent templates assigned to the card must be of the same type If you wish to re read the fingerprint repeat steps 3 through 5 above 6 Press the Accept button and the template will be enrolled At this point the Edit Template window will open see page 28 Complete the Username f...

Страница 32: ...ge 45 Select the appropriate ID number s in the Templates window and click the Delete button recall that you can use the Shift and Ctrl keys to select multiple templates Note You WILL NOT receive a warning when you delete templates so confirm that you have selected the correct ones the first time ...

Страница 33: ...nsfer from one to all templates Download to PC Figure 15 Download Template s to PC 1 In the Template Manager window select the template s you wish to transfer 2 Click the Download to PC button 3 When the screen in Figure 15 appears confirm the download path and directory make any applicable changes 4 Click the OK button When completed the files will be loaded in the designated directory on your PC...

Страница 34: ... E M P L A T E M A N A G E R Page 33 1999 Biometric Identification Inc Note if you are in a networked environment you only need to download from one unit since the template will be the same on all units ...

Страница 35: ... directory 3 Select the appropriate template s 4 Click the Open button Please note that when the template is uploaded the Template ID Number and Index Number is taken from data within the file not from the file name Therefore even if you change the name of the file on your PC the Template number will remain the same Networks if you have more than one Veriprox unit networked together use the above ...

Страница 36: ...wish to broadcast the templates to all units on the network If you broadcast to all units i e select 1 you can have the software verify that the individual steps are complete before moving on however this may increase the amount of time needed to complete the transfers It is recommended that the Verify box remain selected If some one is accessing one of the readers with a proximity card that actio...

Страница 37: ... when your PC is down or unavailable Administering Command Cards Creating Command Cards To create command cards use the Template Manager see Enroll Templates on page 29 Reviewing Command Cards By clicking the Command Card icon on the toolbar or selecting the option from the menu the window below will appear You will notice that the cards are listed by their Template ID numbers all indices for each...

Страница 38: ... Card To enroll a user 1 Wave the Enroll Command Card near the front of the Veriprox unit The light will glow amber directing the Administrator to place his her finger on the unit 2 If the Administrator is authorized to use the Command Card the light will glow green and the unit will beep Continue with the next step If not the light will glow red Return to Step 1 or stop 3 The light will flash yel...

Страница 39: ...r finger on the unit 2 If the Administrator is authorized to use the Command Card the light will glow green and the unit will beep Continue with the next step If not the light will glow red Return to Step 1 or stop 3 The light will flash red indicating the system is ready to delete the card Wave the user card to be deleted 4 The light will glow green and the unit will beep indicating that the card...

Страница 40: ...ommunication Baud rate Figure 19 Communication Port Settings Click the Modify button to change the displayed settings Figure 20 Modify Communications Settings Note Change only one setting at a time and be sure to test the change before clicking the Accept button Same as the Net Status button on the Toolbar Same as the Veriprox Parameters button on the Toolbar Click if you re uncertain of the baud ...

Страница 41: ...to a Veriprox unit Setting a Global Security Threshold for a Veriprox unit Enabling Disabling Wiegand Out Failure and Site codes Modify the Host and Aux Port baud rates Change the Host Protocol View the current statuses and settings of the various ports Figure 21 Veriprox Parameter Settings Note Use caution when changing settings to ensure that you don t lose communication with the unit s Current ...

Страница 42: ...e communication with the unit To re establish contact 1 Close the Veriprox Parameter Settings window 2 Select the new ID number in the Transmit ID drop down list on the toolbar 3 Reopen the Veriprox Parameter Settings window The information in the lower right corner will reflect the new ID number You will not loose communications when modifying the network ID parameter on the Veriprox if you use t...

Страница 43: ...orize using the lower of the two See the appendix for a discussion of security settings and algorithm performance Example If the template is set for Very High and the unit is set for Medium the authorization will be performed at the Medium setting Because of Veriprox s high accuracy rate which practically negates the possibility of a false read the above affords the unit a high rate of true author...

Страница 44: ...to the Wiegand device when a failed authorization occurs The string is numeric and ranges from 0 to 65535 If the box is unchecked then no string will be sent when a verification fails Site Code When you check the Check to Enable Site Code box whatever code you type in the Site Code field will override the site code on all cards used on the unit The string is numeric and ranges from 0 to 255 If the...

Страница 45: ... or Aux Port select the appropriate baud rate from the drop down list 2 Click the Set button If the display in the lower right corner does not update close and re open the window Host Port Protocol The usual protocol settings are as follows RS 232 stand alone devices RS 485 networked devices 1 In the Host Port Protocol section select the appropriate protocol from the drop down list 2 Click the Set...

Страница 46: ...o the Veriprox Parameters window Figure 22 Broadcast Parameters Window Note As with the Veriprox Parameter Settings window change one setting at a time and click the Broadcast button after each change For example if you wish to change the Security Threshold and the Wiegand Out string 1 change the threshold 2 click the Broadcast button in the security section 3 change the string and 4 click the Bro...

Страница 47: ... S Page 46 1999 Biometric Identification Inc Net Status The Net Status window displays the condition of all units networked Figure 23 Net Status Window There are three possible conditions 1 Online 2 No Response 3 Busy ...

Страница 48: ...is can be found in the Help menu under About Veriprox Technical Support For assistance with technical matters contact the Technical Support Department by sending e mail to support biometricid com To speak directly with a technician call 818 501 3908 Customer Service and Sales Support BiometricID is here to assist you with your questions Contact our Customer Service and Sales support departments by...

Страница 49: ...e data stored on the Veriprox that mathematically represents the ridge pattern of an enrolled fingerprint This data is not the raw image of the fingerprint but the result of processing a raw image through our unique algorithmic process preparing the data for later comparisons and compressing the data for maximum storage An image of the uncompressed template data does resemble the raw image but whe...

Страница 50: ... a user to have a single proximity card but be able to enroll multiple fingers During VERIFICATION a user waves their card at the Veriprox reader and places their finger on the sensor The Veriprox then will scan the current fingerprint and compare it against all enrolled templates for that specific card If there are multiple templates enrolled under one card then the Veriprox will check templates ...

Страница 51: ...the fingertip into place instead of lowering it onto the sensor will cause distortion of the fingerprint and will degrade image quality Keep the fingertip raised while locating the Ridge Lock then lower the fingertip Rotating the finger into position also will cause distortion of the fingerprint subsequently making verification less reliable Positioning the finger to one side and leaving a portion...

Страница 52: ...he best performance in the candidate matching process depends on consistency Obviously the user must use the same finger for ID verification as was used to form the original template It also is important to position the finger correctly for each verification as was done when the template was enrolled so the Veriprox sees approximately the same information each time ...

Страница 53: ...jections rarely occur and primarily result from the inability to get a good image of the finger False Acceptance indicates that the Veriprox accepted a fingerprint that does not correspond to the template it was compared against False Acceptances also are rare and primarily result when a fingerprint template is characterized by low information in the enrolled print The algorithm on the Veriprox ha...

Страница 54: ...ty sensors If the quality score falls below three stars BII recommends the following options Ensure that the sensor and finger are clean If the finger and sensor are clean and a dry finger is suspected try re enrolling one more time leaving the finger on the sensor for several seconds prior to enrollment Frequently finger moisture accumulates over time to provide a good image Fingerprint quality c...

Страница 55: ...ources of poor content include improper finger positioning and extremely bland fingerprints If the content score falls below three stars BII recommends the following options Try re enrolling the same finger if finger positioning seems to be the issue see section A 2 Ensure that the user can comfortably place the finger on the sensor while maintaining the core region in the image Fingerprint conten...

Страница 56: ...tive application map of score versus category Score Quality Content Category Very poor Poor Fair High Very high Recommended Enrollment Process Have the user pick one of the following fingers for enrollment Left Index Left Middle Right Index or Right Middle Enroll the chosen finger and note the quality and content results If either is below the minimum threshold follow the directions outlined in th...

Страница 57: ...L I T Y A N D C O N T E N T Page 56 1999 Biometric Identification Inc Biometric Identification Inc 5000 Van Nuys Blvd Suite 300 Sherman Oaks CA 91403 Phone 818 501 3908 Fax 818 461 0843 World Wide Web Site www BiometricID com ...

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